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The JavaScript Interview Handbook: 100+ Interview Questions
The ultimate guide to JavaScript interviews. Developed by FAANG engineers, practice with real-world interview questions, gain confidence, and get interview-ready in just a few hours.
4.5
151 Lessons
10h
Updated 4 months ago
Join 2.9 million developers at
Join 2.9 million developers at
Learning Roadmap
1.
Introduction
Introduction
Get familiar with essential JavaScript concepts to ace frontend interviews.
2.
Language Basics
Language Basics
Discover the logic behind JavaScript basics, including hoisting, closures, scope, and array manipulation.
Quiz: HoistingSolution Review: HoistingChallenge: Create an AmountSolution Review: Create an AmountChallenge: Check ParenthesesSolution Review: Check ParenthesesQuiz 1: Arrow FunctionsSolution Review: Arrow FunctionsQuiz 2: Arrow FunctionsSolution Review: Arrow FunctionsChallenge: Where to InsertSolution Review: Where to InsertQuiz: Call, Apply, BindSolution Review: Call, Apply, BindQuiz 1: ClosureSolution Review: ClosureJavaScript Execution: Call Stack & Event LoopImmediately Invoked Function Expressions (IIFE)Quiz: Closure, `setTimeout`, ScopesSolution Review: Closure, `setTimeout`, ScopesQuiz: Closure, `setTimeout`, IIFESolution Review: Closure, `setTimeout`, IIFEChallenge: Create Phone NumberSolution Review: Create Phone NumberChallenge: Insert ElementsSolution Review: Insert ElementsChallenge: Bind FunctionSolution Review: Bind FunctionQuiz: Rest & Spread SyntaxSolution Review: Rest & Spread SyntaxChallenge: DestructuringSolution Review: DestructuringChallenge: Array DestructuringSolution Review: Array DestructuringChallenge: Return the CatSolution Review: Return the CatChallenge: Destructure UndefinedSolution Review: Destructure Undefined
3.
Type coercion
Type coercion
20 Lessons
20 Lessons
Break apart type coercion concepts using "typeof", "instanceof", prototypes, validation, and inheritance in JavaScript.
4.
Event Handling
Event Handling
8 Lessons
8 Lessons
Break down complex ideas in JavaScript event handling concepts and their interview applications.
5.
Asynchronous Callbacks
Asynchronous Callbacks
16 Lessons
16 Lessons
Map out the steps for understanding and solving asynchronous programming challenges with callbacks, promises, and async/await.
6.
OOP in JavaScript
OOP in JavaScript
22 Lessons
22 Lessons
Focus on understanding OOP in JavaScript through quizzes, challenges, and solution reviews.
7.
Functional Programming
Functional Programming
25 Lessons
25 Lessons
Master functional programming concepts through practical quizzes, challenges, and in-depth solution reviews.
8.
Security
Security
6 Lessons
6 Lessons
Step through key JavaScript security concepts such as same-origin policy, strict mode, and object manipulation protections.
9.
DOM and Web Browser
DOM and Web Browser
14 Lessons
14 Lessons
Walk through various DOM manipulation techniques and problem-solving challenges with hands-on JavaScript tasks.
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Developed by MAANG Engineers
ABOUT THIS COURSE
Preparing for coding interviews can be a long, arduous process. Many developers will tell you they spend countless hours grinding through hundreds of coding questions in order to feel confident. This course will help simplify the grind by showing you what topics to spend your time on and what questions you can expect within those topic areas.
In this course you will focus on the fundamental concepts of JavaScript that interviewers expect you to know. You’ll practice interview questions related to: JS language basics, type coercion, event handling, asynchronous callbacks, and more.
Throughout the course, you will gain hands-on experience through quizzes and challenges that will thoroughly test your understanding of the subject. Each question is accompanied by a detailed explanation of the solution that will further solidify your learnings. By the end of this course, you will have the confidence to go into an interview and answer any question that comes your way.
Trusted by 2.9 million developers working at companies
A
Anthony Walker
@_webarchitect_
E
Evan Dunbar
ML Engineer
S
Software Developer
Carlos Matias La Borde
S
Souvik Kundu
Front-end Developer
V
Vinay Krishnaiah
Software Developer
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