#http clients

5 http clients interview questions, asked at CoreWeave, Baseten, Perplexity. Last asked Sep 2026.

C
Concurrent Python CLI that queries a local serviceCodingWrite a Python command-line tool that looks things up in a service running locally over HTTP, keyed by serial number. 1. Take a list of serial numbers and call the service for…
Last asked Sep 2026
Run blocking API calls in parallel with a thread poolCodingA program makes many blocking API calls one after another. Make them run concurrently with a thread pool, collect the results in the right order, and handle calls that fail or…
Last asked Jul 2026
C
Query machines from an API and mark them offlineCodingWrite code against an HTTP API for a machine inventory: fetch the machines, pick out the ones that should be taken out of service, and call the API to mark each of them offline…
Last asked Feb 2026
C
Token-authenticated client that pulls, transforms and stores dataCodingWrite a small program from scratch, one step at a time: 1. Get an access token through an OAuth flow. 2. Use the token to call a remote endpoint (an old database's API) and fetch…
Last asked Oct 2025
LLM provider pool with failoverCodingWrite a client that sends completion requests to a pool of external LLM providers. It should be able to switch between providers, and when one goes down, move traffic to another…
Last asked Aug 2025