Front-End Interview Questions
137 questions · 7 free to solve now · live editor with instant test feedback.
- 1EasylocalStorage vs sessionStorage vs cookies | Web FundamentalsFree
- 2EasyHow do closures work in JavaScript?Free
- 3EasyFlatten an array in JavaScriptFree
Amazon · Adobe
- 4EasyControlled vs uncontrolled components in ReactFree
Meta · Amazon · Google
- 5EasyImplement sleep: Delay with a JavaScript PromiseFree
Freshworks
- 6EasyTodo list | Frontend Machine CodingFree
- 7EasyMemoize I: Single Argument in JavaScriptFree
Rippling · Forward Networks · LinkedIn
- 8HardAsync Task Scheduler: DAG Dependencies and Concurrency Limit in JavaScript Premium
Rippling · Uber · Amazon
- 9HardDesign Facebook News Feed (frontend) | Frontend System Design Premium
- 10MediumImplement debounce (rate-limit API calls) in JavaScript Premium
Microsoft · Google · Atlassian
- 11EasyWhy is React fast? What is the Virtual DOM? Premium
- 12HardDesign Netflix / YouTube (frontend) | Frontend System Design Premium
- 13EasyEventEmitter class with subscribe, emit, and unsubscribe in JavaScript Premium
BookMyShow · DP World
- 14MediumHow to improve the performance of a web application? | Web Fundamentals Premium
- 15MediumImplement a reusable form field component with validation in React Premium
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