Systems Engineer Interview Questions
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coding
OpenAI
Google
AWS
OpenAI Coding Interview: Time-Based GPU Credit System
Replayable time-based GPU credit system for OpenAI interviews. Covers event-sourced adds/charges, expiry rules, persistence and out-of-order timestamps.
Software Engineer, Backend EngineerEntry Level
coding
Snapchat
TikTok
Meta
Snapchat Coding Interview: Cache with TTL & Capacity
Learn how to implement a cache with TTL and fixed capacity (Snapchat-style). Understand expiration, eviction on insert, and testable get/set semantics—practice now.
Software Engineer, Backend EngineerEntry Level
coding
Visa
Mastercard
PayPal
Visa Coding Interview: Memory Allocator Allocate/Erase
Visa memory allocator: implement allocate [0,k] and erase [1,idx] on a 0/1 array. Key strategies: segment-tree, range updates. Prepare for coding interviews.
Software Engineer, Backend EngineerEntry Level
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