HardTechnical
1
423
Find the median of two sorted arrays
Given two sorted arrays nums1 and nums2, return the median of the two sorted arrays. The overall run time complexity should be O(log(m+n)).
Google
Software Engineer L4
Interview Questions
Real questions from real interviews. Browse, filter, and prepare with crowdsourced experiences from engineers at top tech companies.
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Trending Questions
EasyTechnical
1
334
Reverse a linked list
Given the head of a singly linked list, reverse the list and return the reversed list. Implement both iterative and recursive solutions.
Amazon
Software Development Engineer
EasyPhone Screen
2
312
What are closures in JavaScript?
Explain what closures are in JavaScript. Provide an example of when you would use a closure and explain how it works.
Meta
Frontend Engineer
MediumTechnical
2
289
Implement a LRU Cache
Design and implement a data structure for Least Recently Used (LRU) cache. It should support get and put operations in O(1) time.
Amazon
Software Development Engineer
MediumTechnical
2
267
Implement a debounce function
Write a debounce function that delays invoking a function until after a specified wait time has elapsed since the last time it was invoked.
Apple
Senior Software Engineer
Recent Questions
EasyPhone Screen
1
234
What are the differences between cookies, localStorage, and sessionStorage?
Compare cookies, localStorage, and sessionStorage. What are the use cases, limitations, and security considerations for each?
Amazon
Frontend Engineer
MediumTechnical
1
256
Implement Promise.all from scratch
Implement Promise.all in JavaScript without using the built-in method. Handle success and failure cases correctly.
Meta
Software Engineer
MediumTechnical
1
198
Implement throttle function
Write a throttle function that limits the rate at which a function can be called. It should invoke the function at most once per specified time period.
Netflix
Frontend Engineer
EasyPhone Screen
1
156
What is the difference between Promise.all and Promise.allSettled?
Explain the difference between Promise.all() and Promise.allSettled() in JavaScript. When would you use each?
Apple
Frontend Developer
MediumTechnical
0
167
Explain Python GIL and its implications
What is the Global Interpreter Lock in Python? How does it affect multi-threaded programs and what are the workarounds?
Google
Software Engineer
MediumTechnical
1
189
What is memoization and when should you use it?
Explain the concept of memoization. Implement a memoize function and discuss when memoization is beneficial vs harmful.
Meta
Software Engineer
MediumTechnical
0
223
Implement a trie for autocomplete
Implement a trie data structure with insert, search, and autocomplete functionality. Optimize for prefix searches.
Microsoft
Software Engineer II
EasyPhone Screen
1
245
Explain REST vs GraphQL
Compare REST and GraphQL APIs. What are the pros and cons of each approach? When would you choose one over the other?
Amazon
Full Stack Engineer
MediumTechnical
1
178
Implement a deep clone function in JavaScript
Write a function that creates a deep copy of a JavaScript object. Handle nested objects, arrays, and edge cases like circular references.
Netflix
Senior UI Engineer
MediumTechnical
1
212
What are React hooks rules and why do they exist?
Explain the rules of hooks in React. Why can't we call hooks inside loops, conditions, or nested functions?
Google
Frontend Engineer