Every month, AceOffer adds new interview questions reconstructed from new candidate reports, and refreshes existing questions when new reports change the follow-up patterns or canonical answer. This page lists what shipped each month. Catalog total: 142 questions across Anthropic and OpenAI — plus the free Waymo catalog and the xAI and new Perplexity catalogs.
Perplexity joins the catalog: 4 questionsreconstructed from 29+ candidate reports — the OA-style multi-part coding rounds Perplexity is known for (in-memory Unix file system, an “Implement ToDo list for AI” task DAG with cascade failure, the stop-words streaming problem), plus a codex-fact-checked Design Mint.com system-design walkthrough, all with harness-tested solutions. The in-memory file system question is free — no account required.
xAI joins the catalog: 8 questions reconstructed from 80+ candidate reports — the staged in-memory database with nested transactions (reported 9 times), the complete 15-minute phone-screen script, a lazy-refill rate-limiter system-design walkthrough, and six harness-tested coding solutions. The phone-screen guide and the in-memory database question are free — no account required. More xAI questions ship in the coming weeks.
Waymo joins the catalog: 28 questions reconstructed from 55+ candidate reports — real technical phone screens (BFS/graph, pure-Python data processing), AV-flavored system design (evaluation systems, inference at 100M DAU), six coding solutions, and full system-design walkthroughs. The entire Waymo catalog is free — no account required.
4 new questions and 42 questions refreshed with new candidate reports.
Every question above is reconstructed from real candidate reports, with verbatim follow-ups and the mistakes that sink people.
Browse the catalog →