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5 questions in the library. A source association does not guarantee a future interview question.
Coding · System design
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Find the substring (overlaps allowed) that occurs most often in s among those with length between minSize and maxSize and at most maxLetters distinct characters…
Companies: Chewy, LinkedIn, Microsoft
Hash Table · Sliding Window · String
Last reported Aug 2026
Implement a HashMap for integer keys/values without using built-in hash table libraries that supports put, get, and remove operations. The core challenge is to design…
Companies: Chewy, Anduril, Canva, Goldman Sachs +2
Array · Design · Hash Function · Hash Table
Last reported Aug 2026
Contention on scarce inventory: seat holds with TTL, locking/optimistic concurrency, payments, flash-sale traffic and virtual queues.
Companies: Chewy, Agoda, Airwallex, Amazon +15
concurrency · idempotency · load-shedding · locking
Last reported Jul 2026
Convert days to +1 (hours>8) and -1 (hours<=8) and find the longest contiguous subarray whose sum is >0. This reduces to finding the farthest pair…
Companies: Chewy
Last reported Jul 2026
Given a binary tree and two nodes p and q, find their lowest common ancestor (LCA) — the deepest node that has both p and…
Companies: Chewy, Amazon, Apple, Atlassian +6
Binary Lifting · Binary Tree · Depth-First Search · Lowest Common Ancestor
Last reported Jul 2026