10 Important JavaScript Concepts for Your Next Interview

Most Commonly asked Javascript questions in Interview

Javascript is one of the most popular languages for web developers. If you are a beginner or experienced you will be asked those common questions in an interview. here I am sharing those questions with you. hopefully, you will get common in your next interview

1. Closures

This very common question in javascript interviews. so what is Closures?

Closures allow functions to access variables from an outer function’s scope even after the outer function has finished executing. They enable powerful patterns for encapsulation and data privacy.

Let's see an example of closures

Closures

2. Hoisting

In JavaScript, variables and functions are “hoisted,” meaning they are moved to the top of their scope before code execution. Variables declared with var are initialized as undefined, while let and const declarations are not hoisted in the same way.

See this code snippet, I hope you will understand.