MEAN Stack Interview Questions and Answers 2023

MEAN Stack Interview Questions and Answers 2023 will help you to get a job as a MEAN stack developer in India and you can take into consideration the various interview questions asked by the authorities for the job of mean stack developer if you are planning to become a MEAN stack developer in the upcoming future. It is important to have perfect knowledge regarding the types of questions that are caused by the concerned authorities before directly jumping into the interview. There are a lot of questions that can be asked by the concerned authorities related to the mean stack development Technology and given below we are sharing the same.

List of MEAN Stack Interview Questions and Answers 2023

The authorities will be asking you questions related to the basic knowledge for the MEAN stack development courses in India so you must have proper information related to JavaScript and other programming languages which are included in MEAN stack development programs all around the world. You can check out the list of interview questions and answers available for all of the people who are starting their studies and career as MEAN stack developers.

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• What do you mean by MEAN Stack?

The notion of MEAN stack alludes to the collection of advancements that are JavaScript-based. MEAN is full-stack JavaScript. These are also used to create web applications. 

• What is the abbreviation for MEAN?

MEAN is the abbreviation for ExpressJS, AngularJS, MongoDB and Node.js

• What do you mean by MongoDB?

MongoDB is a document-oriented database used for storing high volumes of data. It is classified as a NoSQL database with the scalability and flexibility that it provides for querying and indexing.

• What do you mean by ExpressJS?

ExpressJS or Express is an essential and moderate web framework of Node.js used for building applications, websites, and backends. It is a free and open-source framework available under MIT license.

• What do you mean by AngularJS?

AngularJS is an open-source front-end web framework used for building dynamic web applications. It lets you extend HTML’s syntax to represent your application components succinctly. Google maintains this javascript-based framework. 

• What do you mean by Node.JS?

Node.js is Server-side scripting that is utilized to construct adaptable projects. Its various favourable circumstances over other server-side are dialects, the noticeable being non-blocking I/O. It is a JavaScript-based platform or runtime, which is built on Chrome’s V8 JavaScript engine. It is a single-threaded program that employs the concurrency models that are based on the event loop. Instead of blocking the execution, it registers a callback which allows the applications to run. So, as per it, Node.js can handle all these concurrent operations without making multiple thread execution which can be scaled pretty well. Along with JavaScript, it uses C and C++. These are used for interacting with the file system. Then, they are started using servers that are based on HTTP or TCP. Because of its rapidly growing popularity, it is now the most common platform for cross-platform or open platform apps. With the help of this, you can develop fast and scalable network apps that can be run smoothly on Linux, Microsoft Windows, or OSX.

• Is Node.Js wholly based on a single thread?

Yes, Node.js can be wholly based on a single thread. However, you should be well aware of the fact that it is just a theory behind the design of Node.Js. Apart from being involved in the process of a single thread mechanism, it also makes use of callbacks and events to cater to a large number of demands. It is also vital for you to note that Node.Js possesses an optimized design. This streamlined design allows it to use both C++ and JavaScript resulting in maximum performance. The JavaScript gets executed at the side of the server. On the other hand, the C++ library ensures the processing of non-sequential I/O with the help of background workers.

• What do you mean by the working mechanism of Node.Js?

It is interesting to note that a Node.Js application facilitates the creation of a single thread when it is activated. Whenever the Node.Js receives a request, it first completes the processing before moving on to the next request processing. It is also important to mention here that Node.Js works by using the event loop. It also uses call-back functions and handles multiple requests that are coming from the user. In the working procedure of Node.Js, an event loop always plays an essential role. An event loop is also known as a function that instigates all the event handlers. Hence, lots of work are done on the back-end. It is also important to note that while processing a request, Node.Js usually attaches a call-back function. When the response is ready, the event triggers the callback function to send the response to the queries of the user.

• What do you mean by the feature of call back from the perspective of Node.Js?

Node.Js makes extensive use of callbacks which enables it to trigger it at the execution of a given task. In this context, it is important to note that a majority of the APIs of the Node.Js is written in such a manner that it supports the feature of callbacks. Become a MEAN stack developer now! Once the file read procedure gets completed, it would ask the call back function and can pass the contents of the file. Hence, it is evident that there is no wait or blocking due to the existence of File I/O. This is the reason that Node.js can be highly scalable as it is involved in processing a higher number of requests without waiting for the function to give back the result that is expected.

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