Awesome JavaScript Interviews

A collection of super-popular Interview questions, along with answers, and some code-snippets that I am putting together for myself while preparing for JavaScript interviews. Many of these questions are what I have actually faced in real interview. It is by no means comprehensive, and the answers are relatively short ( and for each of the concepts, there are probably better and/or more in depth coverage in the web), but I see this repo as reference tool, so I can continue a technical talk with the interviewer for two to three hours.

There are many fantastic resources for JavaScript interview questions, videos, and blog posts on the web and that I have drawn from. I will cite as many as I can throughout so that additional information on each list item can be easily found.

For Understanding the Theory and the fundamentals of some super-popular Algorithm questions

• 🔗 Big O Cheatsheet 🔗 Quick Big O understanding for coding interviews
• 🔗 developers/sorting-algorithms
• 🔗 tackling-javascript-algorithms
• 🔗 sorting-algorithms-in-javascript
• 🔗 Learn-Data_Structure-Algorithm-by-Javascript
• 📖 Grokking Algorithms
• 🔗 Algorithms Visualization
• 🔗 coding-interviews-for-dummies
• 🔗 educative.io/collection/page/
• 🔗 Karp_algorithm
• 🔗 www.geeksforgeeks.org/top-algorithms-and-data-structures-for-competitive-programming/
• 🔗 best javascript-algorithms github repo
• 🔗 14-patterns-to-ace-any-coding-interview-question
• 🔗 Grokking the Coding Interview: Patterns for Coding Questions
• 🔗 https://github.com/amejiarosario/dsa.js-data-structures-algorithms-javascript

Github Repositories with large collections of problems-and-solutions of them most popular Interview challenges

• 🔗 Algorithms-Leetcode-Javascript
• 🔗 Algorithm-in-JavaScript
• 🔗 Javascript-Challenges
• 🔗 JS-Challenges
• 🔗 code-problems-solutions
• 🔗 some common problems
• 🔗 Cracking the Coding Interview - Javascript
• 🔗 interview-questions-in-javascript
• 🔗 javascript-interview-questions
• 🔗 javascript-Exercises
• 🔗 30-seconds-of-interview
• 🔗 js--interview-questions

Overall multi-factor approach for winning this huge challenge and a great journey of getting the first Developer Job

• 🔗 medium.com/javascript-scene/every-developer-needs-a-code-portfolio 🔗 Collection of Resources for Interview preparations and practices 🔗 How I got 7 Job Offers in 8 Weeks
• 🔗 /master-the-javascript-interview-soft-skills
• 🔗 google-lost-a-chance-to-hire-me-finally-amazon-hired-me
• 🔗 the-best-way-to-learn-to-code-is-to-code-learn-app-architecture-by-building-apps
• 🔗 7-key-steps-to-getting-your-first-software-engineering-job
• 🔗 5-key-learnings-from-the-post-bootcamp-job-search
• 🔗 how-to-get-your-first-developer-job-in-4-months
• 🔗 how-to-land-your-first-dev-job-even-if-you-don-t-have-a-cs-degree
• 🔗 how-to-land-a-top-notch-tech-job-as-a-student
• 🔗 unlocking-the-javascript-code-interview-an-interviewer-perspective
• 🔗 get-that-job-at-google.html
• 🔗 i-failed-my-effing-coding-interview-ab720c339c8a
• 🔗 how-i-landed-a-full-stack-developer-job-without-a-tech-degree-or-work-experience
• 🔗 here-are-4-best-ways-to-apply-for-software-engineer-jobs-and-exactly-how-to-use-them
• 🔗 how-to-get-a-tech-job-with-no-previous-work-experience
• 🔗 the-hard-thing-about-learning-hard-things
• 🔗 70-job-find-websites-for-developers-other-tech-professionals
• 🔗 YouTube - 70+ Websites To Find Developer Jobs
• 🔗 YouTube - I'm 47 And Now I Want to be a Programmer
• 🔗 YouTube - How To Be A Well-Paid Programmer In 1 Year?
• 🔗 the-secret-to-being-a-top-developer-is-building-things-heres-a-list-of-fun-apps-to-build

Some other very very important resources

• 🔗 javascript cheatsheet
• 🔗 Super useful es6-cheatsheet
• 🔗 freeCodeCamp Guide
• 🔗 functional-programming-in-js-map-filter-reduce
• 🔗 you-must-understand-these-14-javasript-functions
• 🔗 developer.mozilla.org/JavaScript/A_re-introduction_to_JavaScript
• 🔗 developer.mozilla.org/docs/JavaScript/Guide
• 📖 You-Dont-Know-JS
• 🔗 GeeksForGeeks
• 🔗 Dev.To
• 🔗 Stack Overflow
• 🔗 Dzone
• 🔗 https://scotch.io/
• 🔗 https://30secondsofcode.org/
• 🔗 Front-end JavaScript Interviews in 2018–19

Coding Challenge Practice Platforms

• 🔗 Leetcode
• 🔗 HackerRank
• 🔗 CodeForces
• 🔗 CodeChef
• 🔗 Coderbyte
• 🔗 CodinGame
• 🔗 Cs Academy
• 🔗 Daily Coding Problem
• 🔗 Spoj
• 🔗 HackerEarth
• 🔗 TopCoder
• 🔗 Codewars
• 🔗 Exercism
• 🔗 CodeFights
• 🔗 Project Euler
• 🔗 Interviewcake
• 🔗 InterviewBit
• 🔗 uCoder
• 🔗 LintCode
• 🔗 CodeCombat

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More curated list of general resources for JavaScript Interviews

https://www.thatjsdude.com/interview/js1.html - JS: Interview Algorithm Part-1

https://www.thatjsdude.com/interview/js2.html - JS: Basics and Tricky Questions Part-2: intermediate

https://www.thatjsdude.com/interview/dom.html - JS: Interview Questions Part-3

https://medium.freecodecamp.org/3-questions-to-watch-out-for-in-a-javascript-interview-725012834ccb - 3 JavaScript questions to watch out for during coding interviews

https://github.com/ggomaeng/awesome-js - A curated list of javascript fundamentals and algorithms

https://github.com/Chalarangelo/30-seconds-of-code - Curated collection of useful Javascript snippets that you can understand in 30 seconds or less.

https://medium.com/dev-bits/a-perfect-guide-for-cracking-a-javascript-interview-a-developers-perspective-23a5c0fa4d0d - A perfect guide for cracking a JavaScript interview - A developer’s perspective

https://github.com/yangshun/front-end-interview-handbook - Almost complete answers to "Front-end Job Interview Questions" which you can use to interview potential candidates, test yourself or completely ignore

https://medium.com/javascript-scene/master-the-javascript-interview-what-s-the-difference-between-class-prototypal-inheritance-e4cd0a7562e9 - Master the JavaScript Interview: What’s the Difference Between Class & Prototypal Inheritance?

https://medium.com/javascript-scene/master-the-javascript-interview-what-is-a-closure-b2f0d2152b36 - Master the JavaScript Interview: What is a Closure?

https://medium.com/javascript-scene/master-the-javascript-interview-what-is-function-composition-20dfb109a1a0 - Master the JavaScript Interview: What is Function Composition?

https://medium.com/javascript-scene/common-misconceptions-about-inheritance-in-javascript-d5d9bab29b0a - Common Misconceptions About Inheritance in JavaScript

https://dev.to/arnavaggarwal/10-javascript-concepts-you-need-to-know-for-interviews?utm_source=hashnode.com - 10 JavaScript concepts you need to know for interviews

https://hackernoon.com/a-quick-introduction-to-functional-javascript-7e6fe520e7fa - A Quick Introduction to Functional Javascript

https://github.com/ganqqwerty/123-Essential-JavaScript-Interview-Question - 123-Essential-JavaScript-Interview-Question

https://www.toptal.com/javascript/interview-questions - 37 Essential JavaScript Interview Questions

https://medium.com/coderbyte/a-tricky-javascript-interview-question-asked-by-google-and-amazon-48d212890703 - A Tricky JavaScript Interview Question Asked by Google and Amazon

Many tricky and common javascript-questions

Key Fundamental concepts list, before you go for that Front End Engineering Interview

Frontend/UI Engineer Interviews:

1. call, apply and bind method
2. Polyfill for bind method
3. Currying
4. Debouncing
5. async vs defer
6. Event Bubbling & Capturing
7. Prototype & Prototypal Inheritance
8. Throttling
9. Thinking Recursively
10. Local Storage and Session Storage
11. CORS
12. sum(a)(b)(c)...(n)
13. Web Storage APIs
14. Event Loop
15. Web Sockets
16. Closures
17. Callbacks & Promises
18. Revise everything again
19. Difference between deep clone and shallow clone and how to write your own deep clone fucntion/polyfill for deepclone
20. ES6 data structures such as Map and Set. In certain cases, Map is much better suited than an Object. Probably even Server Sent Events would be a good thing to know.
21. Observable and subscribers, subject, behaviour subject and repeatable subject