{"id":25330,"date":"2023-11-08T11:02:35","date_gmt":"2023-11-08T05:32:35","guid":{"rendered":"https:\/\/www.mygreatlearning.com\/blog\/matlab-interview-questions\/"},"modified":"2025-01-06T19:18:39","modified_gmt":"2025-01-06T13:48:39","slug":"matlab-interview-questions","status":"publish","type":"post","link":"https:\/\/www.mygreatlearning.com\/blog\/matlab-interview-questions\/","title":{"rendered":"Top 46 MATLAB Interview Questions and Answers"},"content":{"rendered":"\n

A numerical computing environment and programming language, MATLAB, was developed by MathWorks. It allows the plotting of functions, matrix manipulations, implementation of algorithms, interfacing with programs written in other languages, including C, C++, and Fortran, and creation of user interfaces. For all budding data science and machine learning professionals, learning MATLAB will help you to focus on areas such as architecture modeling, analysis environment, and Model-Based Design. We have compiled a list of the most frequently asked MATLAB Interview Questions along with their answers to help you prepare better and ace your upcoming interviews. <\/p>\n\n\n\n

Commonly asked MATLAB interview questions<\/strong><\/h2>\n\n\n\n
    \n
  1. What is MATLAB?<\/a><\/strong><\/li>\n\n\n\n
  2. How to install MATLAB?<\/a><\/strong><\/li>\n\n\n\n
  3. How to plot a graph in MATLAB?<\/a><\/strong><\/li>\n\n\n\n
  4. How to call a function in MATLAB?<\/a><\/strong><\/li>\n\n\n\n
  5. What is MATLAB used for?<\/a><\/strong><\/li>\n\n\n\n
  6. How to run MATLAB code?<\/a><\/strong><\/li>\n\n\n\n
  7. How to read images in MATLAB from a folder?<\/a><\/strong><\/li>\n\n\n\n
  8. How to write function in MATLAB?<\/a><\/strong><\/li>\n\n\n\n
  9. How to use for loop in MATLAB?<\/a><\/strong><\/li>\n\n\n\n
  10. How to solve differential equations in MATLAB? <\/a><\/strong><\/li>\n<\/ol>\n\n\n\n

    Let's get started! <\/p>\n\n\n\n

    History of MATLAB<\/strong><\/h2>\n\n\n
    \"History<\/figure>\n\n\n\n

    MATLAB Interview Questions<\/strong><\/h2>\n\n\n\n

    This section on MATLAB Interview Questions covers commonly asked questions during the interview process. Whether you are new to the interview process or are an experienced professional, learning these questions will help you increase your confidence and ace your upcoming interview. <\/p>\n\n\n\n

    What is MATLAB?<\/strong><\/h3>\n\n\n\n

    Ans. <\/strong>MATLAB is an acronym for MATrix LABoratory. It is an open-source software\/API which was initially developed for mathematical calculations, including matrix operations. The latest software version can perform various complex calculations such as data analysis and visualization, scientific and engineering graphics, etc. Its prime features also include simulation and modeling.<\/p>\n\n\n\n

    Check out MATLAB course<\/a> for free. <\/p>\n\n\n\n

    How to install MATLAB?<\/strong><\/h3>\n\n\n\n

    Ans. <\/strong>For installing the latest version of MATLAB, i.e., MATLAB R2020b: <\/p>\n\n\n\n

    Prerequisites (for Windows):<\/p>\n\n\n\n

      \n
    1. A PC or desktop computer with Windows 10 or at-least Windows 7.<\/li>\n\n\n\n
    2. Any Intel or AMD x86-64 processor (for the sake of your pc).<\/li>\n\n\n\n
    3. A minimum of 4 GB RAM but 8 GB is recommended.<\/li>\n\n\n\n
    4. SSD is recommended, but 3.5 GB HDD space for MATLAB only, 5-8 GB for a typical installation.<\/li>\n\n\n\n
    5. A graphic card is not required.<\/li>\n<\/ol>\n\n\n
      \"How<\/figure>\n\n\n\n

      Prerequisites (for Mac):<\/strong><\/p>\n\n\n\n

        \n
      1. macOS Big Sur (11) or macOS Catalina (10.15) or macOS Mojave (10.14).<\/li>\n\n\n\n
      2. Any intel processor x86-64 processor.<\/li>\n\n\n\n
      3. A minimum of 3.4 HDD space is required, but for a full installation space of 29 GB is required.<\/li>\n\n\n\n
      4. A minimum of 4 GB RAM but 8 GB is recommended.<\/li>\n\n\n\n
      5. A graphic card is not required.<\/li>\n<\/ol>\n\n\n\n

        Prerequisites (for Linux):<\/strong><\/p>\n\n\n\n

          \n
        1. Ubuntu versions after the one of 16.04 LTS, Debian 9 and newer versions, Red Hat Enterprise Linux 7 and newer, SUSE Linux Enterprise Desktop 12 and newer, and SUSE Linux Enterprise Server 12 and newer.<\/li>\n\n\n\n
        2. Any Intel or AMD x86-64 processor.<\/li>\n\n\n\n
        3. 3.3 GB of HDD space for MATLAB only, 5-8 GB for a typical installation. But an SSD is recommended.<\/li>\n\n\n\n
        4. A full installation of all MathWorks products may take up to 28 GB of disk space.<\/li>\n\n\n\n
        5. A minimum of 4 GB RAM but 8 GB is recommended.<\/li>\n\n\n\n
        6. A graphic card is not required.<\/li>\n<\/ol>\n\n\n\n

          Installation is the same for all operating systems. You can download the software from any safe website such as its source mathworks.com or sourceforge.net. Simply open the browser, navigate to the URL above, and download the software.<\/p>\n\n\n\n

          But be aware of the fact that MATLAB is such a huge software with its latest update of more than 20 GB. It will not be installed overnight or in a single attempt. So, it is recommended to use any internet download manager to install it on a multi-day attempt.<\/p>\n\n\n\n

          How to plot a graph in MATLAB?<\/strong><\/h3>\n\n\n\n

          Ans. <\/strong>For any two points, x and y, with some values given, a function called plot (x, y) are used to plot a graph in MATLAB.<\/p>\n\n\n\n

          x : [value of array];\n y : [value of array];\nplot(x, y)<\/code><\/pre>\n\n\n\n
          How to call a function in MATLAB?<\/strong><\/h3>\n\n\n\n
          Ans. <\/strong>A function in MATLAB can be called using the name you give to the function, but first, it needs to be written in the New Script tab under the File Tab. You can simply call the function by writing the function\u2019s name in the code area.<\/p>\n\n\n\n
          >> function_name (in the work area)<\/code><\/pre>\n\n\n\n
          What is MATLAB used for?<\/strong><\/h3>\n\n\n\n
          Ans. <\/strong>MATLAB language is a high-level matrix language. It has control structures, functions, data structures, input\/ output, and OOP features. MATLAB API allows to the author of C and FORTRAN programs to interact with MATLAB. It is used for various industry-level designing processes and for running the control systems and automation of different types of machines by defining a particular set of codes for an object.<\/p>\n\n\n\n
          How to run MATLAB code?<\/strong><\/h3>\n\n\n\n
          Ans. <\/strong>NOTE: Before running any code, make sure you save the respective code so that your progress doesn\u2019t fly away. Any code can run in MATLAB once it\u2019s saved by using the Save and Run button in the home tab of MATLAB, or you can simply use the F5 key on your keyboard.<\/p>\n\n\n\n
          How to read images in MATLAB from a folder?<\/strong><\/h3>\n\n\n\n
          Ans. <\/strong>A syntax to read an image from any folder is given as:<\/p>\n\n\n
          \nD = 'directory where the files are saved';\n\nS = dir(fullfile(D,'name*.jpg')); % pattern to match filenames.\n\nfor k = 1:numel(S)\n\n    F = fullfile(D,S(k).name);\n\n    I = imread(F);\n\n    imshow(I)\n\n    S(k).data = I; % optional, save data.\n\nend\n<\/pre><\/div>\n\n\n
          How to write functions in MATLAB?<\/strong><\/h3>\n\n\n\n
          Ans. <\/strong>A function can be written in MATLAB using the New Script option under the File tab.<\/p>\n\n\n\n
          Steps to write a function:<\/em><\/strong><\/p>\n\n\n\n
            \n
          1. Click on the file tab.<\/li>\n\n\n\n
          2. Click on the New Script option.<\/li>\n\n\n\n
          3. A new box will appear wherein you will get a syntax given as<\/li>\n<\/ol>\n\n\n
            \nfunction [y1, ...,yN] = function_name(x1, ...,xM)\n\nend\n\nfunction [y1, ...,yN] = myfun(x1, ...,xM) declares a function named function_name that accepts inputs x1, ...,xM and returns outputs y1, ...,yN.\n<\/pre><\/div>\n\n\n
            Here you can write a function and save it in the folder.<\/p>\n\n\n\n
            How to use for loop in MATLAB?<\/strong><\/h3>\n\n\n\n
            Ans. <\/strong>A for loop is used to repeat a certain set of instructions a fixed number of times.<\/p>\n\n\n\n
            The syntax of for loop is:<\/p>\n\n\n
            \nfor index = values\nstatements\nend\n<\/pre><\/div>\n\n\n
            for index = values, statements, end executes a group of statements in a loop for a specified number of times.<\/p>\n\n\n\n
            How to solve differential equations in MATLAB?<\/strong><\/h3>\n\n\n\n
            Ans. <\/strong>Any differential equation can be solved following a set of instructions and proper syntax. But for more accuracy, we use some solvers, casually known as ODE solvers in general, used for ordinary differential equations. Some of the commonly used ODE solvers are ode23, ode45, ode15s, and ode23s.<\/p>\n\n\n\n
            Syntax to solve differential equations in MATLAB:<\/em><\/strong><\/p>\n\n\n\n
              \n
            1. Create a function in an m-file to define the right-hand side of the equation to be solved.<\/li>\n\n\n\n
            2. Determine the interval length for the independent variable tspan.<\/li>\n\n\n\n
            3. Enter the initial conditions as n0<\/sub>.<\/li>\n\n\n\n
            4. Call the solver to obtain the solution by typing the following command:<\/li>\n<\/ol>\n\n\n\n
              [t, y] = ode23(@function_name, tspan, n0)<\/code><\/pre>\n\n\n\n
                \n
              1. The left-hand side of the command is the output argument containing two vectors. Other solvers, too, use a similar syntax.<\/li>\n<\/ol>\n\n\n\n
                After saving this script, we can call the function by its name or as the saved script name with given some initial conditions to get the answers.<\/p>\n\n\n\n
                How to read CSV files in MATLAB?<\/strong><\/h3>\n\n\n\n
                Ans. <\/strong>CSV stands for Comma-Separated Values. A command called csvread is generally used to read the CSV files but is not actually preferred. <\/p>\n\n\n\n
                Syntax: <\/em><\/strong><\/p>\n\n\n
                \nM = csvread(filename)\n<\/pre><\/div>\n\n\n
                The newer version of MATLAB instead recommends readmatrix to read such types of files.<\/p>\n\n\n\n
                Syntax<\/em>:<\/strong> <\/p>\n\n\n
                \nA = readmatrix(filename)\n<\/pre><\/div>\n\n\n
                What is MATLAB software?<\/strong><\/h3>\n\n\n\n
                Ans. <\/strong>MATLAB is a high-performance language for technical computing. Computation, visualization, and programming are integrated with MATLAB in an easy-to-use environment. It helps the user in the development of algorithms, complex calculations, simulation, modeling, and prototyping of data.<\/p>\n\n\n\n
                How to comment in MATLAB?<\/strong><\/h3>\n\n\n\n
                Ans. <\/strong>Comments in MATLAB can be inserted in between the codes. The syntax for comment goes like this:<\/p>\n\n\n
                \n\u201c % your comment goes here. \u201d\n<\/pre><\/div>\n\n\n