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Roadmap

The Roadmap 75 is a curated list of 75 frontend problems. It’s the most popular list, covering the essential UI, JavaScript, and conceptual questions asked in interviews.

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/74

Solved

Status

NameDifficultyCompanies

Todo List
Easy
Star Widget
Easy
Feedback Form
Easy
Bar Chart I
Medium
City Search I
Medium
Tic Tac Toe I
Medium
Select MenuPro
Medium
Country Capital GamePro
Medium
Transfer ListPro
Medium
CalculatorPro
Easy
Table of ContentsPro
Medium
Virtualized ListPro
Hard
Overlapping CirclesPro
Hard
Tree Navigation IPro
Hard

Status

NameDifficultyCompanies

Status

NameDifficultyCompanies

What is a closure in JavaScript?
Medium
What is the event loop in JavaScript?
Medium
var vs let vs const
Medium
Virtual DOM in React
Medium
this keyword in JavaScript
Medium
What is event delegation in JavaScript?
Medium
CSS selector specificity
Medium
How does the box model work in CSS?
Medium
CSR vs SSR
Medium
How to improve website performance?
Medium
What happens when you type a URL and hit enter?
Medium
Why not mutate state in React?
Medium
call() vs apply()
Medium
call() vs bind()
Medium
Rules of React hooks
Easy
== vs ===
Easy
key prop in React
Easy
What is hoisting in JavaScript?
Easy
async/await in JavaScript
Medium
What is prototypal inheritance?
Medium
Shallow copy vs deep copy
Medium
How does re-rendering work in React?
Medium
Debouncing vs throttling
Medium
Controlled vs uncontrolled components
Medium
How does the useEffect dependency array work?
Medium