Tricky JavaScript Interview Questions to Challenge Your Skills

12

Explain how closures work in JavaScript and provide an example that demonstrates the use of closures with variables.

1

Looking for more JavaScript Interview Questions  to prepare for?

2

What is event delegation in JavaScript? Provide an example and explain its benefits in terms of performance.

Looking for more JavaScript Interview Questions  to prepare for?

3

Explain the concept of hoisting in JavaScript. Provide examples to illustrate how variables and function declarations are hoisted.

Looking for more JavaScript Interview Questions  to prepare for?

4

Explain the difference between creating objects using the Object constructor and Object.create(). Provide an example for each.

Looking for more JavaScript Interview Questions  to prepare for?

5

Write a simple polyfill for the Array.map() function. Explain how it works and its use cases.

Looking for more JavaScript Interview Questions  to prepare for?

6

Write a function to find the maximum value in an array using Math.max() without directly passing the array.

Looking for more JavaScript Interview Questions  to prepare for?

7

Write a code snippet using destructuring to swap the values of two variables without using a temporary variable.

Looking for more JavaScript Interview Questions  to prepare for?

8

Write a program to execute an array of promises sequentially, with a time gap of at least 1000ms between each execution.

Looking for more JavaScript Interview Questions  to prepare for?

9

Write a simple memoization function in JavaScript. Explain how it can be used to optimize function performance.

Looking for more JavaScript Interview Questions  to prepare for?

10

Implement a debounce function that delays the execution of a given function until after a specified amount of time has elapsed since the last time it was invoked.

Looking for more JavaScript Interview Questions  to prepare for?

11

Explain the difference between the microtask and macrotask queues in the event loop. Provide an example that demonstrates the order of execution.

Looking for more JavaScript Interview Questions  to prepare for?

12

Compare and contrast async/await with promises. Provide a code example that utilizes both async/await and promises to handle asynchronous operations.

Looking for more JavaScript Interview Questions  to prepare for?

Ready to  take the Next Step in your Career?

This comprehensive guide will help you prepare for all aspects of the interview process. Don't miss out on your next opportunity!

Improve your Interviewing Skills with Scaler!

Sign up for Scaler's free masterclasses and events to learn about the latest trends in the IT industry and become a pro.  Don't hesitate any longer, register today!