{"id":7798,"date":"2023-11-08T10:22:20","date_gmt":"2023-11-08T04:52:20","guid":{"rendered":"https:\/\/www.mygreatlearning.com\/blog\/nlp-interview-questions\/"},"modified":"2025-02-14T18:06:51","modified_gmt":"2025-02-14T12:36:51","slug":"nlp-interview-questions","status":"publish","type":"post","link":"https:\/\/www.mygreatlearning.com\/blog\/nlp-interview-questions\/","title":{"rendered":"Top 50 NLP Interview Questions and Answers"},"content":{"rendered":"\n<p>Natural Language Processing helps machines understand and analyze natural languages. NLP is an automated process that helps extract the required information from data by applying machine learning algorithms. Learning NLP will help you land a high-paying job as it is used by various professionals such as data scientist professionals, machine learning engineers, etc. <\/p>\n\n\n\n<p>We have compiled a comprehensive list of NLP Interview Questions and Answers that will help you prepare for your upcoming interviews. You can also check out these free <a href=\"https:\/\/www.mygreatlearning.com\/nlp\/free-courses\" target=\"_blank\" rel=\"noreferrer noopener\">NLP courses<\/a> to help with your preparation. Once you have prepared the following commonly asked questions, you can get into the job role you are looking for. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" class=\"wp-block-heading\" id=\"top-nlp-interview-questions\"><strong>Top NLP Interview Questions<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>What is Naive Bayes algorithm, when we can use this algorithm in NLP?<\/li>\n\n\n\n<li>Explain Dependency Parsing in NLP?<\/li>\n\n\n\n<li>What is text Summarization?<\/li>\n\n\n\n<li>What is NLTK? How is it different from Spacy?<\/li>\n\n\n\n<li>What is information extraction?<\/li>\n\n\n\n<li>What is Bag of Words?<\/li>\n\n\n\n<li>What is Pragmatic Ambiguity in NLP?<\/li>\n\n\n\n<li>What is Masked Language Model?<\/li>\n\n\n\n<li>What is the difference between NLP and CI (Conversational Interface)?<\/li>\n\n\n\n<li>What are the best NLP Tools?<\/li>\n<\/ol>\n\n\n\n<p>Without further ado, let's kickstart your NLP learning journey. <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NLP Interview Questions for Freshers<\/li>\n\n\n\n<li>NLP Interview Questions for Experienced<\/li>\n\n\n\n<li>Natural Language Processing FAQ\u2019s<\/li>\n<\/ul>\n\n\n\n<div class=\"topics\" style=\"background:#f6f7f8\">\n\t<div class=\"site-container\">\n\t\t<h2 class=\"section-title\" class=\"section-title\" id=\"check-out-different-nlp-concepts\"> Check Out Different NLP Concepts <\/h2>\t\n\t\t<div class=\"topic-wrapper\">\n\t\t\t\t\t\t<a class=\"card\" href=\"https:\/\/www.mygreatlearning.com\/academy\/learn-for-free\/courses\/natural-language-processing-projects\" target=\"_blank\"> NLP Projects Free Course <\/a>\n\t\t\t\t\t\t<a class=\"card\" href=\"https:\/\/www.mygreatlearning.com\/academy\/learn-for-free\/courses\/nlp-customer-experience\" target=\"_blank\"> NLP Customer Experience Free Course <\/a>\n\t\t\t\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n\n\n<h2 id=\"nlp-interview-questions-for-freshers\"><strong>NLP Interview Questions for Freshers<\/strong><\/h2>\n\n\n\n<p>Are you ready to kickstart your NLP career? Start your professional career with these Natural Language Processing interview questions for freshers. We will start with the basics and move towards more advanced questions. If you are an experienced professional, this section will help you brush up your NLP skills.<\/p>\n\n\n\n<h3 id=\"1-what-is-naive-bayes-algorithm-when-we-can-use-this-algorithm-in-nlp\"><strong>1. <span id=\"1-what-is-naive-bayes-algorithm-when-we-can-use-this-algorithm-in-nlp\">What is Naive Bayes algorithm, When we can use this algorithm in NLP?<\/span><\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/www.mygreatlearning.com\/blog\/introduction-to-naive-bayes\/\" target=\"_blank\" rel=\"noreferrer noopener\">Naive Bayes algorithm<\/a> is a collection of classifiers which works on the principles of the Bayes\u2019 theorem. This series of NLP model forms a family of algorithms that can be used for a wide range of classification tasks including sentiment prediction, filtering of spam, classifying documents and more.<\/p>\n\n\n\n<p>Naive Bayes algorithm converges faster and requires less training data. Compared to other discriminative models like logistic regression, Naive Bayes model it takes lesser time to train. This algorithm is perfect for use while working with multiple classes and text classification where the data is dynamic and changes frequently.<\/p>\n\n\n\n<h3 id=\"2-explain-dependency-parsing-in-nlp\"><strong>2. <span id=\"2-explain-dependency-parsing-in-nlp\">Explain Dependency Parsing in NLP?<\/span><\/strong><\/h3>\n\n\n\n<p>Dependency Parsing, also known as Syntactic parsing in NLP is a process of assigning syntactic structure to a sentence and identifying its dependency parses. This process is crucial to understand the correlations between the \u201chead\u201d words in the syntactic structure. <br> The process of dependency parsing can be a little complex considering how any sentence can have more than one dependency parses. Multiple parse trees are known as ambiguities. Dependency parsing needs to resolve these ambiguities in order to effectively assign a syntactic structure to a sentence.<\/p>\n\n\n\n<p>Dependency parsing can be used in the semantic analysis of a sentence apart from the syntactic structuring. <\/p>\n\n\n\n    <div class=\"courses-cta-container\">\n        <div class=\"courses-cta-card\">\n            <div class=\"courses-cta-header\">\n                <div class=\"courses-learn-icon\"><\/div>\n                <span class=\"courses-learn-text\">Texas McCombs, UT Austin<\/span>\n            <\/div>\n            <p class=\"courses-cta-title\">\n                <a href=\"https:\/\/onlineexeced.mccombs.utexas.edu\/online-ai-machine-learning-course\" class=\"courses-cta-title-link\">Post Graduate Program in AI &amp; Machine Learning: Business Applications<\/a>\n            <\/p>\n            <p class=\"courses-cta-description\">Master in-demand AI and machine learning skills with this executive-level AI course\u2014designed to transform professionals into strategic tech leaders.<\/p>\n            <div class=\"courses-cta-stats\">\n                <div class=\"courses-stat-item\">\n                    <div class=\"courses-stat-icon courses-user-icon\"><\/div>\n                    <span>Duration: 7 months<\/span>\n                <\/div>\n                <div class=\"courses-stat-item\">\n                    <div class=\"courses-stat-icon courses-star-icon\"><\/div>\n                    <span>4.72\/5 Rating<\/span>\n                <\/div>\n            <\/div>\n            <a href=\"https:\/\/onlineexeced.mccombs.utexas.edu\/online-ai-machine-learning-course\" class=\"courses-cta-button\">\n                Take your First Step\n                <div class=\"courses-arrow-icon\"><\/div>\n            <\/a>\n        <\/div>\n    <\/div>\n\n\n\n<h3 id=\"3-what-is-text-summarization\"><strong>3. <span id=\"3-what-is-text-summarization\">What is text Summarization?<\/span><\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/www.mygreatlearning.com\/blog\/text-summarization-in-python\/\" target=\"_blank\" rel=\"noreferrer noopener\">Text summarization<\/a> is the process of shortening a long piece of text with its meaning and effect intact. Text summarization intends to create a summary of any given piece of text and outlines the main points of the document. This technique has improved in recent times and is capable of summarizing volumes of text successfully.<\/p>\n\n\n\n<p>Text summarization has proved to a blessing since machines can summarise large volumes of text in no time which would otherwise be really time-consuming. There are two types of text summarization:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> Extraction-based summarization<\/li>\n\n\n\n<li> Abstraction-based summarization<\/li>\n<\/ul>\n\n\n\n<h3 id=\"4-what-is-nltk-how-is-it-different-from-spacy\"><strong>4. What is NLTK? How is it different from Spacy?<\/strong><\/h3>\n\n\n\n<p>NLTK or Natural Language Toolkit is a series of libraries and programs that are used for symbolic and statistical natural language processing. This toolkit contains some of the most powerful libraries that can work on different ML techniques to break down and understand human language. NLTK is used for Lemmatization, Punctuation, Character count, Tokenization, and Stemming.  The difference between NLTK and Spacey are as follows: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>While NLTK has a collection of programs to choose from, Spacey contains only the best-suited algorithm for a problem in its toolkit<\/li>\n\n\n\n<li> NLTK supports a wider range of languages compared to Spacey (Spacey supports only 7 languages)<\/li>\n\n\n\n<li> While Spacey has an object-oriented library, NLTK has a string processing library<\/li>\n\n\n\n<li> Spacey can support word vectors while NLTK cannot<\/li>\n<\/ul>\n\n\n\n<h3 id=\"5-what-is-information-extraction\"><strong>5. What is information extraction?<\/strong><\/h3>\n\n\n\n<p>Information extraction in the context of Natural Language Processing refers to the technique of extracting structured information automatically from unstructured sources to ascribe meaning to it. This can include extracting information regarding attributes of entities, relationship between different entities and more. The various models of information extraction includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tagger Module<\/li>\n\n\n\n<li>Relation Extraction Module<\/li>\n\n\n\n<li>Fact Extraction Module<\/li>\n\n\n\n<li>Entity Extraction Module<\/li>\n\n\n\n<li>Sentiment Analysis Module<\/li>\n\n\n\n<li>Network Graph Module<\/li>\n\n\n\n<li>Document Classification &amp; Language Modeling Module <\/li>\n<\/ul>\n\n\n\n<h3 id=\"6-what-is-bag-of-words\"><strong>6. What is Bag of Words? <\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/www.mygreatlearning.com\/blog\/bag-of-words\/\" target=\"_blank\" rel=\"noreferrer noopener\">Bag of Words<\/a> is a commonly used model that depends on word frequencies or occurrences to train a classifier. This model creates an occurrence matrix for documents or sentences irrespective of its grammatical structure or word order.&nbsp;<\/p>\n\n\n\n<h3 id=\"7-what-is-pragmatic-ambiguity-in-nlp\"><strong>7. What is Pragmatic Ambiguity in NLP?<\/strong><\/h3>\n\n\n\n<p>Pragmatic ambiguity refers to those words which have more than one meaning and their use in any sentence can depend entirely on the context. Pragmatic ambiguity can result in multiple interpretations of the same sentence. More often than not, we come across sentences which have words with multiple meanings, making the sentence open to interpretation. This multiple interpretation causes ambiguity and is known as Pragmatic ambiguity in NLP.<\/p>\n\n\n\n<h3 id=\"8-what-is-masked-language-model\"><strong>8. What is Masked Language Model?<\/strong><\/h3>\n\n\n\n<p>Masked language models help learners to understand deep representations in downstream tasks by taking an output from the corrupt input. This model is often used to predict the words to be used in a sentence.&nbsp;<\/p>\n\n\n\n<h3 id=\"9-what-is-the-difference-between-nlp-and-ciconversational-interface\"><strong>9. What is the difference between NLP and CI(Conversational Interface)?<\/strong><\/h3>\n\n\n\n<p>The difference between NLP and CI is as follows:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th><strong>Natural Language Processing (NLP)<\/strong><\/th><th><strong>Conversational Interface (CI)<\/strong><\/th><\/tr><\/thead><tbody><tr><td>NLP attempts to help machines understand and learn how language concepts work.<\/td><td>CI focuses only on providing users with an interface to interact with.<\/td><\/tr><tr><td>NLP uses AI technology to identify, understand, and interpret the requests of users through language.<\/td><td>CI uses voice, chat, videos, images, and more such conversational aid to create the user interface.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"10-what-are-the-best-nlp-tools\"><strong>10. What are the best NLP Tools?<\/strong><\/h3>\n\n\n\n<p>Some of the best NLP tools from open sources are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SpaCy<\/li>\n\n\n\n<li>TextBlob<\/li>\n\n\n\n<li>Textacy<\/li>\n\n\n\n<li>Natural language Toolkit (<a href=\"https:\/\/www.mygreatlearning.com\/blog\/nltk-tutorial-with-python\/\" target=\"_blank\" rel=\"noreferrer noopener\">NLTK<\/a>)<\/li>\n\n\n\n<li>Retext<\/li>\n\n\n\n<li>NLP.js<\/li>\n\n\n\n<li>Stanford NLP<\/li>\n\n\n\n<li>CogcompNLP<\/li>\n<\/ul>\n\n\n\n<p>Read more on <a href=\"https:\/\/www.mygreatlearning.com\/blog\/deep-learning-tools-you-should-know\/\">Best NLP Tools<\/a><\/p>\n\n\n\n<h3 id=\"11-what-is-pos-tagging\"><strong>11. What is POS tagging?<\/strong><\/h3>\n\n\n\n<p>Parts of speech tagging better known as <a href=\"https:\/\/www.mygreatlearning.com\/blog\/pos-tagging\/\" target=\"_blank\" rel=\"noreferrer noopener\">POS tagging<\/a> refer to the process of identifying specific words in a document and grouping them as part of speech, based on its context. POS tagging is also known as grammatical tagging since it involves understanding grammatical structures and identifying the respective component.<\/p>\n\n\n\n<p>POS tagging is a complicated process since the same word can be different parts of speech depending on the context. The same general process used for word mapping is quite ineffective for POS tagging because of the same reason.<\/p>\n\n\n\n<h3 id=\"12-what-is-nes\"><strong>12. What is NES?<\/strong><\/h3>\n\n\n\n<p>Name entity recognition is more commonly known as NER is the process of identifying specific entities in a text document that are more informative and have a unique context. These often denote places, people, organizations, and more. Even though it seems like these entities are proper nouns, the NER process is far from identifying just the nouns. In fact, NER involves entity chunking or extraction wherein entities are segmented to categorize them under different predefined classes. This step further helps in extracting information.&nbsp;<\/p>\n\n\n\n<h2 id=\"nlp-interview-questions-for-experienced\"><strong>NLP Interview Questions for Experienced<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"13-which-of-the-following-techniques-can-be-used-for-keyword-normalization-in-nlp-the-process-of-converting-a-keyword-into-its-base-form\"><strong>13. Which of the following techniques can be used for keyword normalization in NLP, the process of converting a keyword into its base form?<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. Lemmatization<\/span><br>b. Soundex<br>c. Cosine Similarity<br><span style=\"font-weight: 400\">d. N-grams<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong><strong>Answer:<\/strong><\/strong> a)<\/span><\/p>\n\n\n\n<p>Lemmatization helps to get to the base form of a word, e.g. are playing -&gt; play, eating -&gt; eat, etc. <span style=\"font-weight: 400\">Other options are meant for different purposes.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"14-which-of-the-following-techniques-can-be-used-to-compute-the-distance-between-two-word-vectors-in-nlp\"><strong>14.&nbsp;Which of the following techniques can be used to compute the distance between two-word vectors in NLP?<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. Lemmatization<\/span><br>b. Euclidean distance<br>c. Cosine Similarity<br>d. N-grams<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong><strong>Answer:<\/strong><\/strong> b) and c)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Distance between two-word<\/span> vectors can be computed using Cosine similarity and Euclidean Distance.&nbsp; Cosine Similarity establishes a cosine angle between the vector of two words. A cosine angle close to each other between two-word vectors indicates the words are similar and vice versa.<\/p>\n\n\n\n<p>E.g. cosine angle between two words \u201cFootball\u201d and \u201cCricket\u201d will be closer to 1 as compared to the <span style=\"font-weight: 400\">angle between the words \u201cFootball\u201d and \u201cNew Delhi\u201d.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Python code to implement CosineSimlarity function would look like this<\/span>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def cosine_similarity(x,y):\n    return np.dot(x,y)\/( np.sqrt(np.dot(x,x)) * np.sqrt(np.dot(y,y)) )\nq1 = wikipedia.page(\u2018Strawberry\u2019)\nq2 = wikipedia.page(\u2018Pineapple\u2019)\nq3 = wikipedia.page(\u2018Google\u2019)\nq4 = wikipedia.page(\u2018Microsoft\u2019)\ncv = CountVectorizer()\nX = np.array(cv.fit_transform(&#091;q1.content, q2.content, q3.content, q4.content]).todense())\nprint (\u201cStrawberry Pineapple Cosine Distance\u201d, cosine_similarity(X&#091;0],X&#091;1]))\nprint (\u201cStrawberry Google Cosine Distance\u201d, cosine_similarity(X&#091;0],X&#091;2]))\nprint (\u201cPineapple Google Cosine Distance\u201d, cosine_similarity(X&#091;1],X&#091;2]))\nprint (\u201cGoogle Microsoft Cosine Distance\u201d, cosine_similarity(X&#091;2],X&#091;3]))\nprint (\u201cPineapple Microsoft Cosine Distance\u201d, cosine_similarity(X&#091;1],X&#091;3]))\nStrawberry Pineapple Cosine Distance 0.8899200413701714\nStrawberry Google Cosine Distance 0.7730935582847817\nPineapple Google Cosine Distance 0.789610214147025\nGoogle Microsoft Cosine Distance 0.8110888282851575<\/code><\/pre>\n\n\n\n<p><span style=\"font-weight: 400\">Usually Document similarity is measured by how close semantically the content (or words) in the document are to each other. When they are close, the similarity index is close to 1, otherwise near 0.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">The&nbsp;<\/span><b>Euclidean distance<\/b><span style=\"font-weight: 400\">&nbsp;between two points is the length of the shortest path connecting them. Usually computed using Pythagoras theorem for a triangle.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"15-what-are-the-possible-features-of-a-text-corpus-in-nlp\"><strong>15. <span id=\"15-what-are-the-possible-features-of-a-text-corpus-in-nlp\">What are the possible features of a text corpus in NLP?<\/span><\/strong><\/h3>\n\n\n\n<p>a. Count of the word in a document<br>b. Vector notation of the word<br>c. Part of Speech Tag<br>d. Basic Dependency Grammar<br>e. All of the above<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> e)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">All of the above can be used as features of the text corpus.<\/span><\/p>\n\n\n\n<h3 id=\"16-you-created-a-document-term-matrix-on-the-input-data-of-20k-documents-for-a-machine-learning-model-which-of-the-following-can-be-used-to-reduce-the-dimensions-of-data\"><strong>16. You created a document term matrix on the input data of 20K documents for a Machine learning model. Which of the following can be used to reduce the dimensions of data?<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><span style=\"font-weight: 400\">Keyword Normalization<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Latent Semantic Indexing<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Latent Dirichlet Allocation<\/span><\/li>\n<\/ol>\n\n\n\n<p><span style=\"font-weight: 400\">a. only 1 <\/span><br><span style=\"font-weight: 400\">b.&nbsp;<\/span>2, 3<br><span style=\"font-weight: 400\">c. 1, 3<\/span><br><span style=\"font-weight: 400\">d. 1, 2, 3<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> d)<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"17-which-of-the-text-parsing-techniques-can-be-used-for-noun-phrase-detection-verb-phrase-detection-subject-detection-and-object-detection-in-nlp\"><strong>17. Which of the text parsing techniques can be used for noun phrase detection, verb phrase detection, subject detection, and object detection in NLP.<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. Part of speech tagging<\/span><br>b. Skip Gram and N-Gram extraction<br>c. Continuous Bag of Words<br>d. Dependency Parsing and Constituency Parsing<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> d)<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"18-dissimilarity-between-words-expressed-using-cosine-similarity-will-have-values-significantly-higher-than-0-5\"><strong>18. Dissimilarity between words expressed using cosine similarity will have values significantly higher than 0.5<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. True<br>b. False<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer: <\/strong>a)<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"19-which-one-of-the-following-is-keyword-normalization-techniques-in-nlp\"><strong>19. Which one of the following is keyword Normalization techniques in NLP<\/strong><\/h3>\n\n\n\n<p>a. Stemming<br>b.&nbsp;Part of Speech<br>c. Named entity recognition<br>d. Lemmatization<\/p>\n\n\n\n<p>Answer: a) and d)<\/p>\n\n\n\n<p>Part of Speech (POS) and Named Entity Recognition(NER) is not keyword Normalization techniques. Named Entity helps<span style=\"font-weight: 400\"> you extract Organization, Time, Date, City, etc., type of entities from the given sentence, whereas Part of Speech helps you extract Noun, Verb, Pronoun, adjective, etc., from the given sentence tokens.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"20-which-of-the-below-are-nlp-use-cases\"><strong>20. Which of the below are NLP use cases?<\/strong><\/h3>\n\n\n\n<p>a. Detecting objects from an image<br>b. Facial Recognition<br>c. Speech Biometric<br>d. Text Summarization<\/p>\n\n\n\n<p>Ans:&nbsp;d)<\/p>\n\n\n\n<p>a) And b) are Computer Vision use cases, and c) is the <span style=\"font-weight: 400\">Speech use case.<\/span><br><span style=\"font-weight: 400\">Only d) Text Summarization is an NLP use case.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"21-in-a-corpus-of-n-documents-one-randomly-chosen-document-contains-a-total-of-t-terms-and-the-term-hello-appears-k-times\"><strong>21. In a corpus of N documents, one randomly chosen document contains a total of T terms and the term \u201chello\u201d appears K times.<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">What is the correct value for the product of TF (term frequency) and IDF (inverse-document-frequency), if the term \u201chello\u201d appears in approximately one-third of the total documents?<\/span><br><span style=\"font-weight: 400\">a. KT * Log(3)<\/span><br><span style=\"font-weight: 400\">b. T * Log(3) \/ K<\/span><br><span style=\"font-weight: 400\">c. K * Log(3) \/ T<\/span><br><span style=\"font-weight: 400\">d. Log(3) \/ KT<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> (c)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">formula for TF is K\/T<\/span><br><span style=\"font-weight: 400\">formula for IDF is log(total docs \/ no of docs containing \u201cdata\u201d)<\/span><br><span style=\"font-weight: 400\">= log(1 \/ (\u2153))<\/span><br><span style=\"font-weight: 400\">= log (3)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Hence, the correct choice is Klog(3)\/T<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"22-in-nlp-the-algorithm-decreases-the-weight-for-commonly-used-words-and-increases-the-weight-for-words-that-are-not-used-very-much-in-a-collection-of-documents\"><strong>22. In NLP, The algorithm decreases the weight for commonly used words and increases the weight for words that are not used very much in a collection of documents<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. Term Frequency (TF)<\/span><br><span style=\"font-weight: 400\">b. Inverse Document Frequency (IDF)<\/span><br><span style=\"font-weight: 400\">c. Word2Vec<\/span><br><span style=\"font-weight: 400\">d. Latent Dirichlet Allocation (LDA)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> b)<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"23-in-nlp-the-process-of-removing-words-like-and-is-a-an-the-from-a-sentence-is-called-as\"><strong>23. In NLP, The process of removing words like \u201cand\u201d, \u201cis\u201d, \u201ca\u201d, \u201can\u201d, \u201cthe\u201d from a sentence is called as<\/strong><\/h3>\n\n\n\n<p>a. <span style=\"font-weight: 400\">Stemming<\/span><br><span style=\"font-weight: 400\">b. Lemmatization<\/span><br><span style=\"font-weight: 400\">c. Stop word<\/span><br>d. All of the above<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Ans:<\/strong> c)&nbsp;<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">In Lemmatization, all the stop words such as a, an, the, etc.. are removed. One can also define custom stop words for removal.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"24-in-nlp-the-process-of-converting-a-sentence-or-paragraph-into-tokens-is-referred-to-as-stemming\"><strong>24. In NLP, The process of converting a sentence or paragraph into tokens is referred to as Stemming<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. True<\/span><br><span style=\"font-weight: 400\">b. False<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> b)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">The statement describes the process of tokenization and not stemming, hence it is False.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"25-in-nlp-tokens-are-converted-into-numbers-before-giving-to-any-neural-network\"><strong>25. In NLP, Tokens are converted into numbers before giving to any Neural Network<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a<\/span>. <span style=\"font-weight: 400\">True<\/span><br><span style=\"font-weight: 400\">b. False<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> a)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">In NLP, all words are converted into a number before feeding to a Neural Network.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"26-identify-the-odd-one-out\"><strong>26. Identify the odd one out<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. nltk<\/span><br>b. scikit learn<br>c. SpaCy<br>d. BERT<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> d)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">All the ones mentioned are NLP libraries except BERT, which is a word embedding<\/span>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"27-tf-idf-helps-you-to-establish\"><strong>27. TF-IDF helps you to establish?<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. most frequently occurring word in document<br>b. the <\/span>most important word in the document<\/p>\n\n\n\n<p><strong>Answer:<\/strong> b)<\/p>\n\n\n\n<p>TF-IDF helps to establish how important a particular word is in the context of the document corpus. TF-IDF takes into account the number of times the word appears in the document and is offset by the number of documents that appear in the corpus.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>TF is the frequency of terms divided by the total number of terms in the document.<\/li>\n\n\n\n<li>IDF is obtained by dividing the total number of documents by the number of documents containing the term and then taking the logarithm of that quotient.<\/li>\n\n\n\n<li>Tf.idf is then the multiplication of two values TF and IDF.<\/li>\n<\/ul>\n\n\n\n<p><span style=\"font-weight: 400\">Suppose that we have term count tables of a corpus consisting of only two documents, as listed here<\/span>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><b>Term<\/b><\/td><td><b>Document 1 Frequency<\/b><\/td><td><b>Document 2 Frequency<\/b><\/td><\/tr><tr><td><span style=\"font-weight: 400\">This<\/span><\/td><td><span style=\"font-weight: 400\">1<\/span><\/td><td><span style=\"font-weight: 400\">1<\/span><\/td><\/tr><tr><td><span style=\"font-weight: 400\">is<\/span><\/td><td><span style=\"font-weight: 400\">1<\/span><\/td><td><span style=\"font-weight: 400\">1<\/span><\/td><\/tr><tr><td><span style=\"font-weight: 400\">a<\/span><\/td><td><span style=\"font-weight: 400\">2<\/span><\/td><td>&nbsp;<\/td><\/tr><tr><td><span style=\"font-weight: 400\">Sample<\/span><\/td><td><span style=\"font-weight: 400\">1<\/span><\/td><td>&nbsp;<\/td><\/tr><tr><td><span style=\"font-weight: 400\">another&nbsp;<\/span><\/td><td>&nbsp;<\/td><td><span style=\"font-weight: 400\">2<\/span><\/td><\/tr><tr><td><span style=\"font-weight: 400\">example<\/span><\/td><td>&nbsp;<\/td><td><span style=\"font-weight: 400\">3<\/span><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><span style=\"font-weight: 400\">The calculation of tf\u2013idf for the term \"this\" is performed as follows:<\/span><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>for \"this\"\n-----------\ntf(\"this\", d1) = 1\/5 = 0.2\ntf(\"this\", d2) = 1\/7 = 0.14\nidf(\"this\", D) = log (2\/2) =0\nhence tf-idf\ntfidf(\"this\", d1, D) = 0.2* 0 = 0\ntfidf(\"this\", d2, D) = 0.14* 0 = 0\nfor \"example\"\n------------\ntf(\"example\", d1) = 0\/5 = 0\ntf(\"example\", d2) = 3\/7 = 0.43\nidf(\"example\", D) = log(2\/1) = 0.301\ntfidf(\"example\", d1, D) = tf(\"example\", d1) * idf(\"example\", D) = 0 * 0.301 = 0\ntfidf(\"example\", d2, D) = tf(\"example\", d2) * idf(\"example\", D) = 0.43 * 0.301 = 0.129<\/code><\/pre>\n\n\n\n<p><span style=\"font-weight: 400\">In its raw frequency form, TF is just the frequency of the \"this\" for each document. In each document, the word \"this\" appears once; but as document 2 has more words, its relative frequency is smaller.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">An IDF is constant per corpus, and accounts for the ratio of documents that include the word \"this\". In this case, we have a corpus of two documents and all of them include the word \"this\". So TF\u2013IDF is zero for the word \"this\", which implies that the word is not very informative as it appears in all documents.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">The word \"example\" is more interesting - it occurs three times, but only in the second document.<\/span> To understand more about NLP, check out these <a href=\"https:\/\/www.mygreatlearning.com\/academy\/learn-for-free\/courses\/natural-language-processing-projects\" target=\"_blank\" rel=\"noreferrer noopener\">NLP projects<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"28-in-nlp-the-process-of-identifying-people-an-organization-from-a-given-sentence-paragraph-is-called\"><strong>28.&nbsp;In NLP, The process of identifying people, an organization from a given sentence, paragraph is called<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. Stemming<\/span><br>b. Lemmatization<br>c. Stop word removal<br><span style=\"font-weight: 400\">d. Named entity recognition<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> d)<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"29-which-one-of-the-following-is-not-a-pre-processing-technique-in-nlp\"><strong>29. Which one of the following is not a pre-processing technique in NLP<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a<\/span>. <span style=\"font-weight: 400\">Stemming and Lemmatization<\/span><br>b. converting to lowercase<br>c. removing punctuations<br>d. removal of stop words<br>e. Sentiment analysis<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> e)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Sentiment Analysis is not a pre-processing technique. It is done after pre-processing and is an NLP use case. All other listed ones are used as part of statement pre-processing.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"30-in-text-mining-converting-text-into-tokens-and-then-converting-them-into-an-integer-or-floating-point-vectors-can-be-done-using\"><strong>30. In text mining, converting text into tokens and then converting them into an integer or floating-point vectors can be done using<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. CountVectorizer<\/span><br>b.&nbsp; TF-IDF<br>c. Bag of Words<br>d. NERs<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> a)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">CountVectorizer helps do the above, while others are not applicable.<\/span><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>text =&#091;\"Rahul is an avid writer, he enjoys studying understanding and presenting. He loves to play\"]\nvectorizer = CountVectorizer()\nvectorizer.fit(text)\nvector = vectorizer.transform(text)\nprint(vector.toarray())<\/code><\/pre>\n\n\n\n<p><strong>Output&nbsp;<\/strong><\/p>\n\n\n\n<p>[[1 1 1 1 2 1 1 1 1 1 1 1 1 1]]<\/p>\n\n\n\n<p>The second section of the interview questions covers advanced NLP techniques such as Word2Vec, GloVe word embeddings, and advanced models such as GPT, Elmo, BERT, XLNET-based<em> questions, and explanations.<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"31-in-nlp-words-represented-as-vectors-are-called-neural-word-embeddings\"><strong>31. In NLP, Words represented as vectors are called Neural Word Embeddings<\/strong><\/h3>\n\n\n\n<p>a. True<br>b. False<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> a)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Word2Vec, GloVe based models build word embedding vectors that are multidimensional.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"32-in-nlp-context-modeling-is-supported-with-which-one-of-the-following-word-embeddings\"><strong>32. In NLP, Context modeling is supported with which one of the following word embeddings<\/strong><\/h3>\n\n\n\n<div class=\"inherit-container-width wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<ol class=\"wp-block-list\">\n<li><span style=\"font-weight: 400\">a. Word2Vec<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">b) GloVe<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">c) BERT<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">d) All of the above<\/span><\/li>\n<\/ol>\n<\/div>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> c)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Only <a href=\"https:\/\/www.mygreatlearning.com\/blog\/what-is-bert\/\">BERT<\/a> (Bidirectional Encoder Representations from Transformer) supports context modelling where the previous and next sentence context is taken into consideration. In Word2Vec, GloVe only word embeddings are considered and previous and next sentence context is not considered.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"33-in-nlp-bidirectional-context-is-supported-by-which-of-the-following-embedding\"><strong>33. In NLP, Bidirectional context is supported by which of the following embedding<\/strong><\/h3>\n\n\n\n<p>a. Word2Vec<br>b. BERT<br>c. GloVe<br>d. All the above<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> b)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Only BERT provides a bidirectional context. The BERT model uses the previous and the next sentence to arrive at the context.Word2Vec and GloVe are word embeddings, they do not provide any context.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"34-which-one-of-the-following-word-embeddings-can-be-custom-trained-for-a-specific-subject-in-nlp\"><strong>34. Which one of the following Word embeddings can be custom trained for a specific subject in NLP<\/strong><\/h3>\n\n\n\n<p>a. Word2Vec<br>b. BERT<br>c. GloVe<br>d. All the above<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> b)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">BERT allows Transform Learning on the existing pre-trained models and hence can be custom trained for the given specific subject, unlike Word2Vec and GloVe where existing word embeddings can be used, no transfer learning on text is possible.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"35-word-embeddings-capture-multiple-dimensions-of-data-and-are-represented-as-vectors\"><strong>35. Word embeddings capture multiple dimensions of data and are represented as vectors<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. <\/span>True<br>b. False<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> a)<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"36-in-nlp-word-embedding-vectors-help-establish-distance-between-two-tokens\"><strong>36.<\/strong>&nbsp;<strong>In NLP, Word embedding vectors help establish distance between two tokens<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. <\/span>True<br>b. False<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer: a)<\/strong><\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>One can use Cosine similarity to establish the <\/strong>distance between two vectors represented through Word Embeddings<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"37-language-biases-are-introduced-due-to-historical-data-used-during-training-of-word-embeddings-which-one-amongst-the-below-is-not-an-example-of-bias\"><strong>37. Language Biases are introduced due to historical data used during training of word embeddings, which one amongst the below is not an example of bias<\/strong><\/h3>\n\n\n\n<p>a. New Delhi is to India, Beijing is to China<br>b. Man is to Computer, Woman is to Homemaker<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> a)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Statement b) is a bias as it buckets Woman into Homemaker, whereas statement a) is not a biased statement.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"38-which-of-the-following-will-be-a-better-choice-to-address-nlp-use-cases-such-as-semantic-similarity-reading-comprehension-and-common-sense-reasoning\"><strong>38. Which of the following will be a better choice to address NLP use cases such as semantic similarity, reading comprehension, and common sense reasoning<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. <\/span>ELMo<br>b. Open AI\u2019s GPT<br>c. ULMFit<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer: <\/strong>b)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Open AI\u2019s GPT is able to learn complex patterns in data by using the Transformer models Attention mechanism and hence is more suited for complex use cases such as semantic similarity, reading comprehensions, and common sense reasoning.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"39-transformer-architecture-was-first-introduced-with\"><strong>39. Transformer architecture was first introduced with?<\/strong><\/h3>\n\n\n\n<p><span style=\"font-weight: 400\">a. <\/span>GloVe<br>b. BERT<br>c. Open AI\u2019s GPT<br>d. ULMFit<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer: <\/strong>c)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">ULMFit has an LSTM based Language modeling architecture. This got replaced into Transformer architecture with Open AI\u2019s GPT.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"40-which-of-the-following-architecture-can-be-trained-faster-and-needs-less-amount-of-training-data\"><strong>40. Which of the following architecture can be trained faster and needs less amount of training data<\/strong><\/h3>\n\n\n\n<p>a. LSTM-based Language Modelling<br>b. Transformer architecture<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer:<\/strong> b)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Transformer architectures were supported from GPT onwards and were faster to train and needed less amount of data for training too.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"41-same-word-can-have-multiple-word-embeddings-possible-with-____________\"><strong>41. Same word can have multiple word embeddings possible with ____________?<\/strong><\/h3>\n\n\n\n<p>a. GloVe<br>b. Word2Vec<br>c. ELMo<br>d. nltk<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer: <\/strong>c)<\/span><\/p>\n\n\n\n<p>EMLo word embeddings support the same word with multiple embeddings, this helps in using the same word in a different context and thus captures the context than just the meaning of the word unlike in GloVe and Word2Vec. Nltk is not a word embedding.<\/p>\n\n\n<figure class=\"wp-block-image td-caption-align-https:\/\/www.mygreatlearning.com\/blog\/wp-content\/uploads\/2019\/11\/NLP-Interview-questions-infographicsai-01.jpg zoomable\" data-full=\"https:\/\/www.mygreatlearning.com\/blog\/wp-content\/uploads\/2019\/11\/NLP-Interview-questions-infographicsai-01.jpg\"><img decoding=\"async\" width=\"750\" height=\"890\" src=\"https:\/\/www.mygreatlearning.com\/blog\/wp-content\/uploads\/2019\/11\/NLP-Interview-questions-infographicsai-01.jpg\" alt=\"NLP Interview questions infographicsai-01\" class=\"wp-image-7834\" srcset=\"https:\/\/www.mygreatlearning.com\/blog\/wp-content\/uploads\/2019\/11\/NLP-Interview-questions-infographicsai-01.jpg 750w, https:\/\/www.mygreatlearning.com\/blog\/wp-content\/uploads\/2019\/11\/NLP-Interview-questions-infographicsai-01-253x300.jpg 253w, https:\/\/www.mygreatlearning.com\/blog\/wp-content\/uploads\/2019\/11\/NLP-Interview-questions-infographicsai-01-696x826.jpg 696w, https:\/\/www.mygreatlearning.com\/blog\/wp-content\/uploads\/2019\/11\/NLP-Interview-questions-infographicsai-01-354x420.jpg 354w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<p><span style=\"font-weight: 400\"><br><strong><b style=\"font-weight: 400\"><b><\/b><\/b><\/strong><\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"42-for-a-given-token-its-input-representation-is-the-sum-of-embedding-from-the-token-segment-and-position\"><strong><b style=\"font-weight: 400\"><b>42. For a given token, its input representation is the sum of embedding from the token, segment and position&nbsp;<\/b><\/b><\/strong><strong><\/strong><\/h3>\n\n\n\n<p><strong><b style=\"font-weight: 400\"><b>embedding<\/b>\n<br><span style=\"font-weight: 400\"> a. ELMo<\/span><br>b. GPT<br>c. BERT<br>d. ULMFit<br><span style=\"font-weight: 400\"><strong>Answer:<\/strong> c)<\/span><br><span style=\"font-weight: 400\">BERT uses token, segment and position embedding.<\/span><br><strong><br><\/strong><\/b><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"43-trains-two-independent-lstm-language-model-left-to-right-and-right-to-left-and-shallowly-concatenates-them\"><strong><b style=\"font-weight: 400\"><strong><b>43. Trains two independent LSTM language model left to right and right to left and shallowly concatenates them<\/b><\/strong><\/b>.<\/strong><\/h3>\n\n\n\n<strong><b style=\"font-weight: 400\"><br>a. GPT<br>b. BERT<br>c. ULMFit<br>d. ELMo<br><span style=\"font-weight: 400\"><strong>Answer:<\/strong> d)<\/span><br><span style=\"font-weight: 400\">ELMo tries to train two independent LSTM language models (left to right and right to left) and concatenates the results to produce word embedding.<\/span><\/b><\/strong>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"44-uses-unidirectional-language-model-for-producing-word-embedding\"><strong>44. Uses unidirectional language model for producing word&nbsp;embedding.<\/strong><\/h3>\n\n\n\n<p>a. BERT<br>b. GPT<br>c. ELMo<br>d. Word2Vec<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Answer: <\/strong>b)&nbsp;<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">GPT is a bidirectional<\/span> model and word embedding is<span style=\"font-weight: 400\"> produced by training on information flow from left to right. ELMo is bidirectional but shallow. Word2Vec provides simple word embedding.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"45-in-this-architecture-the-relationship-between-all-words-in-a-sentence-is-modelled-irrespective-of-their-position-which-architecture-is-this\"><strong>45. In this architecture, the relationship between all words in a sentence is modelled irrespective of their position. Which architecture is this?<\/strong><\/h3>\n\n\n\n<p>a. OpenAI GPT<br>b. ELMo<br>c. BERT<br>d. ULMFit<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Ans:<\/strong> c)<\/span><\/p>\n\n\n\n<p><a href=\"https:\/\/www.mygreatlearning.com\/blog\/what-is-bert\/\">BERT<\/a> Transformer architecture models the relationship between each word and all other words in the sentence to generate attention scores. These attention scores are later used as weights for a weighted average of all words\u2019 representations which is fed into a fully-connected network to generate a new representation.<\/p>\n\n\n\n<h3 id=\"46-list-10-use-cases-to-be-solved-using-nlp-techniques\"><strong>46. List 10 use cases to be solved using NLP techniques?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-weight: 400\">Sentiment Analysis<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Language Translation (English to German, Chinese to English, etc..)<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Document Summarization<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Question Answering<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Sentence Completion<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Attribute extraction (Key information extraction from the documents)<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Chatbot interactions<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Topic classification<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Intent extraction<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Grammar or Sentence correction<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Image captioning<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Document Ranking<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400\">Natural Language inference<\/span><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"47-transformer-model-pays-attention-to-the-most-important-word-in-sentence\"><strong>47. Transformer model pays attention to the most important word in Sentence<\/strong>.<\/h3>\n\n\n\n<p>a. True<br>b. False<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Ans:<\/strong> a) Attention mechanisms in the Transformer model are used to model the relationship between all words and also provide weights to the most important word.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"48-which-nlp-model-gives-the-best-accuracy-amongst-the-following\"><strong>48. Which NLP model gives the best accuracy amongst the following?<\/strong><\/h3>\n\n\n\n<p>a. BERT<br>b. XLNET<br>c. GPT-2<br><span style=\"font-weight: 400\">d. ELMo<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Ans:<\/strong> b) XLNET<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">XLNET has given best accuracy amongst all the models. It has outperformed BERT on 20 tasks and achieves state of art results on 18 tasks including sentiment analysis, question answering, natural language inference, etc.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"49-permutation-language-models-is-a-feature-of\"><span style=\"font-weight: 400\"><strong>49. Permutation Language models is a feature of<\/strong><\/span><\/h3>\n\n\n\n<p>a. BERT<br><span style=\"font-weight: 400\">b. EMMo<\/span><br>c. GPT<br>d. XLNET<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Ans:<\/strong> d)&nbsp;<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">XLNET provides permutation-based language modelling and is a key difference from BERT. In permutation language modeling, tokens are predicted in a random manner and not sequential. The order of prediction is not necessarily left to right and can be right to left. The original order of words is not changed but a prediction can be random.&nbsp;The conceptual difference between BERT and XLNET can be seen from the following diagram.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"50-transformer-xl-uses-relative-positional-embedding\"><span style=\"font-weight: 400\"><strong>50. Transformer XL uses relative positional embedding<\/strong><\/span><\/h3>\n\n\n\n<p>a. True<br>b. False<\/p>\n\n\n\n<p><span style=\"font-weight: 400\"><strong>Ans:<\/strong> a)<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Instead of embedding having to represent the absolute position of a word, Transformer XL uses an embedding to encode the relative distance between the words. This embedding is used to compute the attention score between any 2 words that could be separated by n words before or after.<\/span><\/p>\n\n\n\n<p>There, you have it - all the probable questions for your NLP interview. Now go, give it your best shot. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"natural-language-processing-faqs\"><strong>Natural Language Processing FAQs <\/strong><\/h3>\n\n\n\n<h3 id=\"1-why-do-we-need-nlp\"><strong>1. Why do we need NLP?<\/strong><\/h3>\n\n\n\n<p>One of the main reasons why NLP is necessary is because it helps computers communicate with humans in natural language. It also scales other language-related tasks. Because of NLP, it is possible for computers to hear speech, interpret this speech, measure it and also determine which parts of the speech are important. <\/p>\n\n\n\n<h3 id=\"2-what-must-a-natural-language-program-decide\"><strong>2. What must a natural language program decide?<\/strong><\/h3>\n\n\n\n<p>A natural language program must decide what to say and when to say something. <\/p>\n\n\n\n<h3 id=\"3-where-can-nlp-be-useful\"><strong>3. Where can NLP be useful?<\/strong><\/h3>\n\n\n\n<p>NLP can be useful in communicating with humans in their own language. It helps improve the efficiency of the machine translation and is useful in emotional analysis too. It can be helpful in <a href=\"https:\/\/www.mygreatlearning.com\/academy\/learn-for-free\/courses\/sentiment-analysis-using-python\" target=\"_blank\" rel=\"noreferrer noopener\">sentiment analysis using python<\/a> too. It also helps in structuring highly unstructured data. It can be helpful in creating chatbots, Text Summarization and virtual assistants. <\/p>\n\n\n\n<h3 id=\"4-how-to-prepare-for-an-nlp-interview\"><strong>4. How to prepare for an NLP Interview?<\/strong><\/h3>\n\n\n\n<p>The best way to prepare for an NLP Interview is to be clear about the basic concepts. Go through blogs that will help you cover all the key aspects and remember the important topics. Learn specifically for the interviews and be confident while answering all the questions.  <\/p>\n\n\n\n<h3 id=\"5-what-are-the-main-challenges-of-nlp\"><strong>5. What are the main challenges of NLP?<\/strong><\/h3>\n\n\n\n<p>Breaking sentences into tokens, Parts of speech tagging, Understanding&nbsp;the context, Linking components of a created vocabulary, and Extracting semantic meaning are currently some of the main challenges of NLP.  <\/p>\n\n\n\n<h3 id=\"6-which-nlp-model-gives-best-accuracy\"><strong>6. Which NLP model gives best accuracy?<\/strong><\/h3>\n\n\n\n<p>Naive Bayes Algorithm has the <strong>highest accuracy<\/strong> when it comes to NLP models. It gives up to  73% correct predictions. <\/p>\n\n\n\n<h3 id=\"7-what-are-the-major-tasks-of-nlp\"><strong>7. What are the major tasks of NLP?<\/strong><\/h3>\n\n\n\n<p>Translation, named entity recognition, relationship extraction, sentiment analysis,&nbsp;speech recognition, and topic segmentation are few of the major tasks of NLP. Under unstructured data, there can be a lot of untapped information that can help an organization grow. <\/p>\n\n\n\n<h3 id=\"8-what-are-stop-words-in-nlp\"><strong>8. What are stop words in NLP?<\/strong><\/h3>\n\n\n\n<p>Common words that occur in sentences that add weight to the sentence are known as stop words. These stop words act as a bridge and ensure that sentences are grammatically correct. In simple terms, words that are filtered out before processing natural language data is known as a stop word and it is a common pre-processing method. <\/p>\n\n\n\n<h3 id=\"9-what-is-stemming-in-nlp\"><strong>9. What is stemming in NLP?<\/strong><\/h3>\n\n\n\n<p> The process of obtaining the root word from the given word is known as stemming. All tokens can be cut down to obtain the root word or the stem with the help of efficient and well-generalized rules. It is a rule-based process and is well-known for its simplicity. <\/p>\n\n\n\n<h3 id=\"10-why-is-nlp-so-hard\"><strong>10. Why is NLP so hard?<\/strong><\/h3>\n\n\n\n<p>There are several factors that make the process of Natural Language Processing difficult. There are hundreds of natural languages all over the world, words can be ambiguous in their meaning, each natural language has a different script and syntax, the meaning of words can change depending on the context, and so the process of NLP can be difficult. If you choose to upskill and continue learning, the process will become easier over time.<\/p>\n\n\n\n<h3 id=\"11-what-does-a-nlp-pipeline-consist-of\"><strong>11. What does a NLP pipeline consist of *?<\/strong><\/h3>\n\n\n\n<p>The overall architecture of an&nbsp;<strong>NLP pipeline consists<\/strong>&nbsp;of several layers: a user interface; one or several&nbsp;<strong>NLP<\/strong>&nbsp;models, depending on the use case; a Natural Language Understanding layer to describe the&nbsp;<strong>meaning of<\/strong>&nbsp;words and sentences; a preprocessing layer; microservices for linking the components together and of course.<\/p>\n\n\n\n<h3 id=\"12-how-many-steps-of-nlp-is-there\"><strong>12. How many steps of NLP is there?<\/strong><\/h3>\n\n\n\n<p>The&nbsp;five phases&nbsp;of NLP involve lexical (structure) analysis, parsing, semantic analysis, discourse integration, and pragmatic analysis.<\/p>\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Natural Language Processing helps machines understand and analyze natural languages. NLP is an automated process that helps extract the required information from data by applying machine learning algorithms. Learning NLP will help you land a high-paying job as it is used by various professionals such as data scientist professionals, machine learning engineers, etc. We have [&hellip;]<\/p>\n","protected":false},"author":41,"featured_media":7838,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2],"tags":[],"content_type":[36249],"class_list":["post-7798","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-artificial-intelligence","content_type-interview-questions"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>50+ NLP Interview Questions and Answers<\/title>\n<meta name=\"description\" content=\"We have curated a list of the top commonly asked NLP interview questions and answers that will help you ace your interviews.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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