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The JavaScript Interview Handbook: 100+ Interview Questions

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Introduction

About This Course Evaluate Yourself

Language Basics

Quiz: Hoisting Solution Review: Hoisting Challenge: Create an Amount Solution Review: Create an Amount Challenge: Check Parentheses Solution Review: Check Parentheses Quiz 1: Arrow Functions Solution Review: Arrow Functions Quiz 2: Arrow Functions Solution Review: Arrow Functions Challenge: Where to Insert Solution Review: Where to Insert Quiz: Call, Apply, Bind Solution Review: Call, Apply, Bind Quiz 1: Closure Solution Review: Closure JavaScript Execution: Call Stack & Event Loop Immediately Invoked Function Expressions (IIFE)Quiz: Closure, `setTimeout`, Scopes Solution Review: Closure, `setTimeout`, Scopes Quiz: Closure, `setTimeout`, IIFE Solution Review: Closure, `setTimeout`, IIFE Challenge: Create Phone Number Solution Review: Create Phone Number Challenge: Insert Elements Solution Review: Insert Elements Challenge: Bind Function Solution Review: Bind Function Quiz: Rest & Spread Syntax Solution Review: Rest & Spread Syntax Challenge: Destructuring Solution Review: Destructuring Challenge: Array Destructuring Solution Review: Array Destructuring Challenge: Return the Cat Solution Review: Return the Cat Challenge: Destructure Undefined Solution Review: Destructure Undefined

Type coercion

Quiz 1: "typeof" Operator Solution Review: "typeof" Operator Challenge: Validate Arguments Solution Review: Validate Arguments Quiz 1: "instanceof" Operator Solution Review: "instanceof" Operator Challenge: Inheritance Check Solution Review: Inheritance Check Quiz 2: "instanceof" Operator Solution Review: "instanceof" Operator Challenge: Instance of Array?Solution Review: Instance of Array?Challenge: Check Instance of Variables Solution Review: Check Instance of Variables Quiz: prototype.toString & "typeof"Solution Review: prototype.toString & "typeof"Challenge: Array or Not?Solution Review: Array or Not?Challenge: Validate the Date Solution Review: Validate the Date

Event Handling

Quiz: Call Stack & Event Loop Solution Review: Call Stack & Event Loop Quiz: Event Bubbling Solution Review: Event Bubbling Quiz: Event Capturing Solution Review: Event Capturing Quiz: Event Delegation Solution Review: Event Delegation

Asynchronous Callbacks

Challenge: Callback Functions Solution Review: Callback Functions Challenge: Check the Names Solution Review: Check the Names Challenge: Asynchronous Callback Functions Solution Review: Asynchronous Callback Functions Quiz 1: Promises Solution Review: Promises Challenge: Even or Odd?Solution Review: Even or Odd?Quiz 2: Promises Solution Review: Promises Challenge: Print Numbers Sequentially Solution Review: Print Numbers Sequentially Quiz: Async & Await Solution Review: Async & Await

OOP in JavaScript

Quiz: Native & Host Objects

Solution Review: Native & Host Objects

Quiz: `this` Keyword

Solution Review: `this` Keyword

Challenge: Prototype Property

Solution Review: Prototype Property

Challenge: isPrototypeOf

Solution Review: isPrototypeOf

Challenge: ES6 Classes

Solution Review: ES6 Classes

Quiz: Inheritance

Solution Review: Inheritance

Challenge: Prototypal Inheritance

Solution Review: Prototypal Inheritance

Challenge: ES6 Inheritance

Solution Review: ES6 Inheritance

Quiz: "super" Keyword

Solution Review: "super" Keyword

Challenge: Counting Animals

Solution Review: Counting Animals

Challenge: Let's Make a Burger

Solution Review: Let's Make a Burger

Functional Programming

Quiz: Pure Function Solution Review: Pure Function Challenge: Purify the Function Solution Review: Purify the Function Challenge: Let's Add Properties Solution Review: Let's Add Properties Quiz: Shallow Copy Solution Review: Shallow Copy Challenge: Shallow to Deep Solution Review: Shallow to Deep Quiz: Higher Order Functions Solution Review: Higher Order Functions Challenge: Make Maximum Donuts Solution Review: Make Maximum Donuts Challenge: Calculate Score Solution Review: Calculate Score What Are Currying Functions?Challenge: Let's Curry!Solution Review: Let's Curry!Quiz: Partial Functions Solution Review: Partial Functions Challenge: Make a Sentence Solution Review: Make a Sentence Challenge: Club Entry System Solution Review: Club Entry System

Security

Quiz: Same Origin Policy Solution Review: Same Origin Policy Quiz: "strict" Mode Solution Review: "strict" Mode Challenge: Catch the Error Solution Review: Catch the Error

DOM and Web Browser

Quiz 1: DOM Solution Review: DOM Quiz 2: DOM Solution Review: DOM Challenge: Hide & Show Solution Review: Hide & Show Challenge: Get Elements Using Attributes Solution Review: Get Elements Using Attributes Challenge: Add a Class Solution Review: Add a Class Challenge: Destroy the Button Solution Review: Destroy the Button Challenge: Is a Child?Solution Review: Is a Child?

Challenge: Counting Animals

This challenge will test you on implementing the "static" keyword in JavaScript.

Problem statement #

Study the code below and then run it.

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