mediumOpenAICoreWeave

Implement a GPU credit calculator.

A reported OpenAI phone-screen exercise that looks trivial and is graded on edge cases: money-safe arithmetic, billing increments, unknown SKUs, and the clarifying questions you ask before typing.

Updated Aug 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

A reported OpenAI phone-screen exercise that looks trivial and is graded on edge cases: money-safe arithmetic, billing increments, unknown SKUs, and the clarifying questions you ask before typing.

20 answers per topic instead of 10, plus saved progress and bookmarks · no cardor unlock all 523 remaining answers · ₹2,000 / $25

UP NEXT ON YOUR JOURNEY

Next in this trackDesign the infrastructure to serve a ChatGPT-scale assistant to hundreds of millions of weekly users.Next in this trackA 256-GPU job hangs at a collective with every GPU at 100%. Triage the NCCL hang.Next in this trackServe a 400B-class MoE under a 200ms p99 inter-token SLA. How do you lay it out?

DISCUSSION · 0

No comments yet — be the first to share your approach.