React Mock Test: Placement

TNP Officer crafted questions covering key React concepts like components, hooks, state management, lifecycle methods, and more. Whether you’re just starting out or already have experience, this mock test will help you measure your skills so that you can improve them. Here you can practice ReactJs questions and give free mock tests to check your knowledge.

Why to take TNP Officer’s Free ReactJS Mock Test?

Anyone interested in ReactJs can take this test. The benefits are as follows 

  • You will have Real-time exam experience

  • It Covers essential and advanced ReactJS topics

  • It will gieve you Instant feedback and score analysis

  • This test is Ideal for interview and placement preparation

Take the test now and enhance your ReactJS skills with TNP Officer

General Instructions:
1. Each React test contains 15 questions.
2. Total allotted time is 20 minutes for each test.
3. No negative marking.
4. Try to finish it on time.
5. The Test will be submitted automatically if the time expired.
6. Don’t refresh the page.

 

React Test 1

 

React Test 2

 

React Test 3

 

React Test 4

 

React Test 5

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What is React?

React or ReactJS is one of the most popular JavaScript libraries for building fast, dynamic, and interactive user interfaces. It is originally developed by Facebook (now Meta)and it’s widely used in modern web development because of its component-based architecture and efficient Virtual DOM.

Key Features of ReactJS

  • Component-Based Architecture – It Build reusable UI components.
  • Virtual DOM – It Improves performance by updating only necessary parts of the page.
  • JSX (JavaScript XML) – A syntax extension that allows writing HTML inside JavaScript.
  • State & Props – It manage dynamic data and pass information between components.
  • Hooks –It enable state management and lifecycle features in functional components.
  • One-Way Data Binding – It ensures better control over data flow.

Why You Should Learn ReactJS?

High Demand – It is used by top companies like Facebook, Instagram, Netflix, and Airbnb.
Easy to Learn – React have Simple concepts with a vast community for support.
Fast Performance – It render with the Virtual DOM efficiently.
SEO-Friendly – It Supports server-side rendering for better search engine rankings.

ReactJS is an excellent choice for developers who want to build scalable, interactive, and high-performance web applications.

Frequently Asked Questions
What is ReactJS?

ReactJS is a JavaScript library developed by Facebook for building fast, interactive, and scalable user interfaces using a component-based architecture.

JSX (JavaScript XML) is a syntax extension that allows developers to write HTML-like code inside JavaScript. It makes React components easier to read and write.

  • State: Stores component-specific data that can change over time.
  • Props: Short for “Properties,” they are read-only and passed from a parent component to a child component.

React Hooks are functions introduced in React 16.8 that allow functional components to use state and other React features without writing a class. Example hooks:

  • useState() – Manages component state.
  • useEffect() – Handles side effects like data fetching.
  • useContext() – Accesses context values globally.

The Virtual DOM is a lightweight copy of the real DOM. React updates this Virtual DOM first and then syncs only the changed parts with the actual DOM, improving performance.

 

You can practice React coding online using platforms like TNP Officer’s ReactJs Mock Test, LeetCode, HackerRank, and CodeChef.

ReactJS is primarily used for Front-End Development. It is a JavaScript library designed to build dynamic and interactive user interfaces for web applications.

 

ReactJS itself is not a backend framework, but it can work alongside backend technologies like:

  • Node.js & Express – Often used with React to build full-stack applications.
  • Firebase & Supabase – Serverless backend services that integrate well with React.
  • GraphQL & REST APIs – React fetches data from backend services via APIs.

For full-stack development, you can use React for the frontend and Node.js, Django, or Ruby on Rails for the backend.

 

There are multiple ways to learn React

  • Start with React official documentation.
  • Build small projects and practice with coding challenges.
  • Take React mock tests on tnpofficer to assess your knowledge.
  • Join communities like React.js Discord, GitHub, and Stack Overflow.

There is no difference between React and ReactJS—they both refer to the same JavaScript library developed by Facebook (now Meta) for building user interfaces.

Why Do People Use Both Terms?

  React – The common and widely used name.
  ReactJS – Emphasizes that it’s a JavaScript library, similar to how AngularJS was named.

Whether you call it React or ReactJS, they mean the same thing and are used interchangeably.

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