2025 Fresher’s Frontend Interview 🎉 | JavaScript | #reactjs (Mock) [Most Commonly Asked Questions]

Fresher’s Frontend Interview 🎉 | JavaScript | React.js

Are you a fresher looking to land your first frontend developer job? Well, you’re in the right place! In this tutorial, we’ll cover the most asked questions in frontend interviews in 2023, focusing on JavaScript and React.js. By mastering these questions, you’ll be well-prepared to ace your frontend interview and kickstart your career in web development.

1. Tell us about yourself:
This is often the first question asked in an interview. Be prepared to talk about your educational background, projects you have worked on, and any relevant experience or skills you have. Keep your answer concise and highlight your strengths that are relevant to the job.

2. What is JavaScript?
JavaScript is a programming language commonly used in web development to add interactivity and dynamic behavior to websites. It is versatile and can be used for both frontend and backend development.

3. What is the difference between let and var in JavaScript?
In JavaScript, let is block-scoped, meaning it is only accessible within the block of code it is defined in. Var, on the other hand, is function-scoped, meaning it is accessible throughout the function it is defined in.

4. What is React.js?
React.js is a popular JavaScript library for building user interfaces. It allows developers to create reusable UI components and efficiently manage the state of their applications.

5. What are functional components in React.js?
Functional components in React.js are a simpler way to define components using functions instead of classes. They are lightweight and perform better than class components in many cases.

6. What is JSX in React.js?
JSX is a syntax extension for JavaScript that allows developers to write HTML-like code within their JavaScript files. It makes it easier to create and manage UI components in React.js.

7. How do you manage state in React.js?
State in React.js can be managed using the useState hook, which allows you to define and update state variables within functional components. You can also use the useContext hook for managing global state across multiple components.

8. What is the difference between props and state in React.js?
Props are read-only data passed from parent components to child components, while state is mutable data that is managed within a component. Props are used to pass data down the component tree, while state is used to manage internal component data.

9. How do you handle events in React.js?
In React.js, you can handle events by using event handlers such as onClick, onChange, etc. You can attach these event handlers to DOM elements and define custom functions to handle the events.

10. What are React hooks?
React hooks are functions that allow you to use state and other React features in functional components. Some commonly used hooks are useState, useEffect, useContext, and useRef.

By mastering these most asked questions in 2023, you’ll be well-prepared to impress your interviewers and land your dream frontend developer job. Remember to practice coding and problem-solving regularly to strengthen your skills and confidence. Good luck in your frontend interview! 🚀