Cohere coding interview

Round 4 of 7 · 4 questions reported

Length: 60 min
Format: Live coding
They grade: Standard algorithmic problems, with RAG-flavored ones more often than at other labs
AI use: Reported as generally allowed; you are graded on the work, not on how you use AI
Heads-up: Interviewers push back on memorized solutions to check understanding.

Questions Cohere asks in this round 4

Credit card form with validation and linked fieldsCodingBuild a card-details form in the browser (React is fine): cardholder name, card number, expiry date and security code. Validate each field as the user types and on submit, and…
Last asked Sep 2026
Greedy, top-k and top-p decoding for a language modelCodingYou get a toy language model with a small vocabulary whose forward pass returns next-token logits for the tokens so far. Using NumPy, write the generation loop and three ways to…
Last asked Sep 2026
Replace a text game's heuristic logic with LLM callsCodingYou are handed a text game that runs in the terminal, with a few hundred lines of Python that make its decisions through hand-written rules. In a live session, swap that…
Last asked Sep 2026
Delete one '5' from a digit string to get the largest numberCodingYou get a string of decimal digits that contains at least one '5'. Remove exactly one of the '5' characters so that the number left is as large as possible, and return that…
Last asked Sep 2026