Ask for a Ledger, Not a Demo
The demo is fine. The candidate posts a link, the chat box answers three questions, and the streaming works. Then you ask what happens on request four thousand, and the screen goes quiet. That silence is the whole interview. Anyone can get a model to answer once. The engineering is in what your service does when the budget stops being theoretical — and a take-home is the cheapest place in the…
A common interview question asks candidates to build a small service that queries a hosted model, deploy it, and track token usage. The task reveals how the applicant handles budget constraints. The article suggests defining a "budget guard" that logs every token spent during a request and raises an exception when the limit is reached.
The guard should enforce a minimum token count and reject requests that exceed the allocated budget. By requiring candidates to implement this guard, interviewers can assess their ability to design systems that manage resources responsibly and prevent unnoticed consumption.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
