Everything About React Interview

It's becoming more difficult to choose the correct technology for creating an app or a website. These days, the trend in the market is react. React is currently the most popular front-end technology, with more and more businesses adopting it. Being a React.js expert is one thing, but getting through a React.js interview is quite another.

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In this article, We are going to list some of the most important ReactJS Interview Questions in 2023 which will set you apart in the interview process.

We are going to understand the fundamentals and building blocks of React by answering the most frequently asked interview questions.

Most Common ReactJS Interview Questions 2022

What is React?

React is a JavaScript library created by Facebook. React is a User Interface (UI) libr-
ary. React is a tool for building UI comp-

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It is called JSX, and it is a syntax extension to JavaScript. We recommend using it with
React to describe what the UI should look

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Virtual DOM

A virtual DOM object has the same properties as a real DOM object, but it lacks the real thing's power to directly change what's on the screen.

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Components in React

A JavaScript function is a piece of code that performs a certain task. When "something" calls a JavaScript function, it is executed.

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State in React

The state is an instance of React Component Class can be defined as an object of a set of observable properties that control the

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Props in React

It is an object which stores the value of attributes of a tag and work similar to the
HTML attributes.

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Router in React

React Router is a lightweight, fully-featured routing library for the React JavaScript library. React Router runs everywhere that React runs

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React Hooks

Hooks are functions that let you “hook into” React state and lifecycle features from function components.

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Lifecycle of React

Each component in React has a lifecycle
which you can monitor and manipulate
during its three main phases.

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React Redux

Splice() is used to add or remove an element
in a array, and it would modify the origin array. Slice and splice are two useful JavaScript methods for working with JavaScript methods

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Fetch JSON In React

This guide will demonstrate how to correctly fetch data from a JSON file in your React app and consume it on the frontend

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React Events

Click, change, mouseover, and other HTML events are available in React.

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React Flux

Flux solves state management difficulty with a unidirectional data flow pattern.

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React Class

The bread and butter of most modern ReactJS web projects are React class-based components.

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React Fragments

React fragments are a simple yet beautiful feature that was introduced with the release
of React.

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React Lists and Keys

A key is a one-of-a-kind identifier. It's used in React to figure out which items in the Lists have changed, been updated, or been removed.

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React Refs

React refs are similar to keys in that they can be introduced as an attribute to an element.

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React Conditional Rendering

Conditional rendering in React operates in the same way that conditions do in JavaScript.

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