JavaScript Interview Questions

Q1 What is the difference between var, let, and const? ✓ Answered → Q2 What is hoisting in JavaScript? ✓ Answered → Q3 Explain closures in JavaScript. ✓ Answered → Q4 What is the difference between == and ===? ✓ Answered → Q5 What is event bubbling and event capturing? ✓ Answered → Q6 What is the event loop? ✓ Answered → Q7 What are callbacks? ✓ Answered → Q8 What is a Promise in JavaScript? ✓ Answered → Q9 What is async/await? ✓ Answered → Q10 What is the difference between synchronous and asynchronous code? ✓ Answered → Q11 What is a higher-order function? ✓ Answered → Q12 Explain map, filter, and reduce. ✓ Answered → Q13 What is destructuring? ✓ Answered → Q14 What is the spread operator? ✓ Answered → Q15 What is the rest parameter? ✓ Answered → Q16 What is a pure function? ✓ Answered → Q17 What is currying? ✓ Answered → Q18 What is debouncing and throttling? ✓ Answered → Q19 What is this keyword in JavaScript? ✓ Answered → Q20 Explain prototype and prototypal inheritance. ✓ Answered →