Technical Phone Screen on an In-Memory Rate Limiter

The question was the rate limit one. You need to use an in-memory rate limiter to protect an API endpoint. The rate limiter is initialized with a value that represents the maximum number of requests allowed per second. Every time a request hits the API endpoint, it first asks the rate limiter whether there is still capacity to handle the request, and the rate limiter decides based on that whether…

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