Top 15 JavaScript Interview Questions and Answers (With Code Examples)
JavaScript is the backbone of web development, and whether you're applying for a frontend or full-stack role, you will face JavaScript questions in your interview. In this post, we’ve compiled the top 15 most commonly asked JavaScript interview questions — from the basics to tricky advanced topics, complete with clear answers and examples. 📌 Table of Contents What is the difference between == and === ? What are closures in JavaScript? What is hoisting? What are callback functions? What is the event loop? Difference between var , let , and const What is a Promise? What is async/await? What is the difference between null and undefined? Explain “this” keyword in JavaScript What is prototypal inheritance? What are arrow functions? Explain setTimeout and setInterval What is a higher-order function? How does JavaScript handle asynchronous code? ❓ Q1: What is the difference between == and === ? ✅ == compares values after type coe...