One-Hour Concurrency Round on Batching HTTP Requests, Rejected

1-hour interview, focused on concurrency. The interviewer has a bachelor's in CS from MIT. The role is SWE, AI Infra, and it requires a bachelor's plus 3 years of YOE. The problem: send an HTTP batch request to /get?keys=key1,key2 every 100ms. You need to think about how to schedule the 100ms callback, and how to store the keys waiting to be sent along with the callback for each key. Make sure ht…

Shared by a candidate · reported Oct 2026. Interview formats change; use it as a guide, not a script.