You own a company that is rapidly growing and you are looking forward to expanding your IT department. Maybe you are building your in-house IT facility and it’s time to hire some cloud computing experts that will take charge of the new duties. This could turn out as a difficult task for non-technical managers who have no knowledge about cloud computing and have to make highly technical questions.

Top 8 Interview questions for cloud computing experts

1. What types of data are used in cloud computing?
This may sound as a simple question, but in order to answer it, an IT professional has to show he or she is up to date with the latest trend in cloud computing. In fact, there are three types of data necessary to work with the cloud to save and store various data files. First of all, you want the candidate to talk about unstructured data. Unstructured data is data that has an unknown or unclassified structure. You can classify as unstructured data all those file types such as images, video, text and search engine results. After unstructured data, a cloud computing expert should talk about structured data. This type data is processed, accessed, and stored in a fixed format. An example of structured data is contained in database management systems. Finally, we find semi-structured data, which is a mix of structured and unstructured data. A good example of this type of data is XML format.
2. Can name some of the most important cloud platform databases? 
Cloud computing is a technology that is rapidly evolving in terms of speed, scalability, and efficiency. This is happening especially thanks to open source software that are becoming an integral part of the cloud.Just to name a few, your candidate should be familiar with MongoDB, CouchDB, and LucidDB. The first one, MongoDB, is written in C++, it offers high storage capabilities. Also, this database system is schema free and document-oriented. CouchDB, on the other hand, is based on Apache server and is very efficient and reliable at its job (which is storing data).Finally, we find LucidDB, employed for data warehousing, and it is written in Java/C++.
3. What is our advantage as a company adopting cloud computing facilities?
This can be a crucial question, as it implies the core question whether or not your company will get any advantage from building an in-house cloud computing department. Also, it gives you a clear view of how much your candidate understands the importance and benefits found in cloud computing. The reasons to build a cloud computing division within your company are many, and your prospect should be able to name those reported below. – Thanks to cloud computing, your data backup and data storage will be safe- Your IT department will be able to boost your server capabilities without the need to invest on hardware.- Your software will be able to work on any operating system- You will be able to use your cloud computing as a software as a service (SaaS) without the need to include a third party company- As you opt for building a new IT capability within your company you will increase productivity and cut costs.- You will be able to grow and scale your business.
4. Can you talk about platforms that are used for large-scale cloud computing?
With this question, your candidate will have to show his deep knowledge about platforms for data storage and processing, as well as scalability. Two main platforms are Apache Hadoop and MapReduce. Apache Hadoop is an open software platform built specifically for distributed storage and distributed processing of very large datasets. Hadoop is aimed to provide for data storage, data processing, data access, data governance, security, and operations. Introduced by Google, MapReduce marks the new frontier for analysis of large-scale data with this platform. MapReduce provides the user with the ability to process a huge number of datasets using cloud sources and commodity hardware. It provides fault tolerance and transparent scalability at the software level.
5. Name the different service models provided by cloud computing.
Again, this question will test the cloud computing expert’s knowledge of the different types of service offered by cloud computing. There are three different types of service: Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). The first one, Infrastructure as a Service, is a hardware facility provided by a third party, which also manages it. Platform as a Service consists of the operating system layer and it is operated by another company as well.Software as a Service regards all applications and programs hosted in the cloud.
6. How can cloud computing help our company?
This is an important question especially for mid-size to big companies that are more interesting in building a private cloud than a small business that may opt for the public cloud. Besides private cloud and public cloud, there are also community cloud and hybrid cloud infrastructures. A company may build a private cloud to be used exclusively for its internal needs, it can be supervised by the company itself or a by another enterprise, or both. Its physical position may be where the company is located or may be positioned in a remote data center.A community cloud infrastructure is aimed to provide its services to a limited community of users that have a shared interest in their businesses. What about the public cloud? As the name says, the public cloud is thought to be used by the public. It can be operated by a third organization and its location is situated where the data center of the cloud provider is.When merging two or more cloud infrastructure you create a hybrid cloud, even though the different clouds keep their distinct attributes. They are called hybrid because they share the proprietary tech that enables data and app portability.
7. Why should a company opt for utility computing?
This is a complex question that requires a complex answer: thanks to utility computing the end user will only have to pay for the service on a per use basis. The user will have the ability to increase the number of services he’s using to satisfy his needs. This approach to cloud computing can be very remunerative for those businesses that plan to scale and grow their product.
8. When transferring data to the cloud, what is the best way to make this operation safe?
By adopting a secure key, you can make sure there will not be any data leaks, whether they’re malicious or not, from the cloud storage. This action will make intercepting your data impossible when it moves into the cloud.



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