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Interview questions by company and topic | SysRound

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30 questions

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CodingMediumLeetCode 1797
Design Authentication Manager
Manage tokens that expire timeToLive seconds after creation/renewal, supporting generate, renew (only if the token is still unexpired), and countUnexpiredTokens (with…
Companies: Adobe, OpenAI
Design · Doubly-Linked List · Hash Table · Linked List
Last reported Feb 2026
Open workspace
CodingHardLeetCode 1912
Design Movie Rental System
Maintain dynamic collections to (1) return the cheapest up-to-5 shops that have an unrented copy of a given movie and (2) report the cheapest up-to-5…
Companies: Amazon, Okta
Array · Design · Hash Table · Heap (Priority Queue)
Last reported Sep 2024
Open workspace
CodingMediumLeetCode 622
Design Circular Queue

Page 2 of 2

Implement a fixed-size circular queue (ring buffer) supporting enqueue, dequeue, Front/Rear, isEmpty and isFull operations without using built-in queue types. The core…

Companies: NVIDIA

Array · Design · Linked List · Queue

CodingMediumLeetCode 3829

Design Ride Sharing System

Companies: Rippling

Data Stream · Design · Hash Table · Queue

CodingHardLeetCode 2227

Encrypt and Decrypt Strings

Implement an Encrypter that maps each character to a two-letter code and supports encrypting by replacing characters and decrypting by counting how many dictionary words…

Companies: Duolingo

Array · Design · Hash Table · String