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JavaScript

30

What is the Event Loop? Explain the relationship between Call Stack and Task Queue

JavaScript Advanced

What is the Prototype Chain? How does JavaScript inheritance work?

JavaScript Intermediate

What is a Closure?

JavaScript Basic

What is 0.1 + 0.2 in JavaScript? Why? How to avoid floating-point issues?

JavaScript Intermediate

What are the differences between null, undefined, and undeclared?

JavaScript Basic

What are the data types in JavaScript? How do you identify a variable's data type?

JavaScript Basic

What are the differences between Set, Map, WeakSet, and WeakMap?

JavaScript Intermediate

What are the differences between Map and Object? Why use Map when Object exists?

JavaScript Intermediate

What are the differences between var, let, and const in JavaScript?

JavaScript Basic

What is strict mode (use strict)? What are its benefits?

JavaScript Basic

What is Hoisting in JavaScript?

JavaScript Basic

JavaScript Array Iteration Methods (for loop, for...in, for...of, forEach, map, filter, every, some)

JavaScript Basic

How do you calculate the average of an array in JavaScript?

JavaScript Basic

What are Scope and Scope Chain in JavaScript?

JavaScript Intermediate

What are the differences between ==, ===, and Object.is() in JavaScript?

JavaScript Basic

Explain the value of 'this' in JavaScript

JavaScript Intermediate

What is a Higher-Order Function?

JavaScript Basic

What is an IIFE (Immediately Invoked Function Expression) in JavaScript? What are the pros and cons?

JavaScript Basic

What are the differences between arrow functions and regular functions in JavaScript?

JavaScript Basic

In JavaScript, does sort with (a,b) ⇒ b - a produce ascending or descending order? Why?

JavaScript Basic

What is ES6 class? How does it differ from function constructors?

JavaScript Intermediate

What is Promise.all? Please implement Promise.all

JavaScript Intermediate

How do you use call, apply, and bind in JavaScript?

JavaScript Intermediate

What is a Promise in JavaScript? What is it used for?

JavaScript Intermediate

What is Promise.race()? How do you implement it?

JavaScript Intermediate

What is the difference between shallow copy and deep copy in JavaScript? How do you implement them?

JavaScript Intermediate

What are the new features in ES2023?

JavaScript Basic

Implement array flattening (flatten)

JavaScript Intermediate

Why is structuredClone recommended for deep copying in JavaScript?

JavaScript Intermediate

What are the new features in ES6?

JavaScript Basic