Interview Questions Hub

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Total Questions

174

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Categories
Algorithms 1 Computer Systems 1 Data Structures 8 JavaScript 80 Programming Languages 46 React Native 38
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Easy
3

What is the output of `console.log(2 + '2')`?

JavaScript
Medium
4

Explain closures in JavaScript

JavaScript
Easy
3

What is the difference between `null` and `undefined`?

JavaScript
Medium
3

What is hoisting in JavaScript?

JavaScript
Hard
2

Explain the event loop

JavaScript
Medium
2

What is the output of `0.1 + 0.2 === 0.3`?

JavaScript
Medium
2

What is a Promise?

JavaScript
Medium
3

Explain arrow function differences

JavaScript
Hard
2

What is the Temporal Dead Zone?

JavaScript
Medium
2

How does `this` work in JavaScript?

JavaScript
Hard
2

What is prototype inheritance?

JavaScript
Easy
3

What is the output of `typeof NaN`?

JavaScript
Medium
2

Explain event delegation

JavaScript
Medium
2

What is a pure function?

JavaScript
Easy
2

What is the difference between == and ===?

JavaScript
Hard
6

Explain CORS

JavaScript
Medium
2

What is a IIFE?

JavaScript
Medium
2

What is memoization?

JavaScript
Easy
2

Explain the spread operator

JavaScript
Hard
2

What is the call stack?

JavaScript