5 Best React Interview Questions & Answers

Choosing the correct software to construct an app or website is increasingly complex with each passing year. React is the most rapidly expanding JavaScript framework. When it comes to simple abstraction and reusable components, React is a clear victor for front-end developers all around the world. Let’s go over the most often requested React Interview Questions:

  1. What is React?

Facebook created React, a front-end programming framework, in 2013. It employs a component-based approach that aids in the creation of reusable UI components. It’s used to build sophisticated and engaging websites, mobile apps, and dynamic interfaces.front end react developer

Its primary function is to show what is visible on web sites. It also divides each page into little parts. These pieces are referred to as components. Simply specify which portions of the interface are displayed in each state of your add-on, and React will modify and include only the essential components as your data changes.


  1. What is a React component?

To put it simply, a React Component is a piece of code that is a part of a web page.

To form the page, we call the functions in a certain order, collect the results of the calls together and show them to the user.

React uses a programming language called JSX, which is similar to HTML but runs inside JavaScript, which makes it different from HTML.


  1. What are the characteristics of React?

All DOM properties and attributes (including event handlers) in React must be in camelCase. The components enable users to partition the interface into discrete portions that may be reused before and are viewed as such that they work independently from one another. Writing a JavaScript function is the simplest approach to define a component. Because they are JavaScript functions, these components are referred to as functional components.custom cms development company

Components may be written in a variety of ways as JavaScript classes. These are referred to as component classes. Information about the present state can be stored in class-based components. This data is referred to as state (it is stored by the JS object)


  1. How does the component react to events?

A user, for example, can interact with elements by clicking the play music button. We must respond to these occurrences. Everything occurs as a result of the function that handles the event. This function is known as an event handler. When the state of the component changes, the render function is called again.


  1. List of the most significant benefits of React

With the help of Rect, you can reduce the likelihood of possible inconvenience when increasing the performance of high-load applications, this can improve the user experience. Rendering pages is faster allowing users to feel more comfortable while working with your offer. Search engines index such pages better. It is possible to reduce the development time and cost of the application by how much the same code can be used both in the client and in the northern part of the application and there is no need to duplicate the same functionality. Thanks to the reuse, it has become much easier to create a mobile application. So, the cat written during the creation of the site can again be used in the mobile application. There is no need to hire two large development teams for this. In general, and briefly can be added to the advantages.


  1. Improving the user experience of your sites and applications
  2. Increased development speed
  3. Using the most trendy development technologies.


When interviewing a React developer, you should ask questions regarding JavaScript and other aspects that are more intimately relevant to the project or position in question.

This post intended to address some fundamental talking points that would indicate whether or not a developer understands React and its essential ideas. I hope you find it beneficial – best wishes!