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Practice coding, system design, behavioral, and project questions for frontier AI roles.
Every question has a public brief with the task, constraints, and follow-ups. Labels describe interactive practice access.
Reported interview periodN/A
After a deploy the cache is empty and every request misses. Design a warming path that keeps origin load bounded, then explain how readers stay correct when warming dies halfway.
Practice focusCaching, Backpressure, Failure recovery through a written response exercise.
Reported interview periodN/A
Every serving host needs the new 500 GB checkpoint before it can switch versions. Design the delivery path so transfer, verification, activation, and recovery do not collide.
Practice focusArtifact distribution, Integrity verification, Rollout control, Fleet recovery through a written response exercise.
Reported interview periodN/A
High-volume document review needs extraction, model judgment, evidence links, and a human queue whose decisions can be defended later. Design the pipeline and the versioning that keep it auditable.
Practice focusPipeline design, Evidence linking, Human-in-the-loop review, Versioning through a written response exercise.
Reported interview periodN/A
One latency-sensitive workload and one throughput workload must coexist on eight GPUs. Define who gets in, how batches form, when preemption is allowed, and how both promises survive a lost GPU.
Practice focusScheduling policy, Batching, Fairness, Failure recovery through a written response exercise.
Reported interview periodN/A
The per-token price dropped to one fifth of its previous level while the prompt sets and reported traffic held steady, yet the monthly bill climbed. Build the account of where the money went, then defend the one fix you would ship.
Practice focusCost attribution, Experiment design, Token accounting, Root-cause analysis through a written response exercise.
Reported interview periodN/A
One session can carry hours of streamed output and far more history than the DOM should hold. Choose the transport, define what a resume means, and keep reading position and memory under control.
Practice focusStreaming protocols, Resume semantics, Incremental rendering, Virtualization through a written response exercise.
Reported interview periodN/A
A posting product lets an author write now and publish later. Design the path from submission to publication, then keep it correct when authors edit, cancel, and retry while delivery fans out to followers.
Practice focusDurable scheduling, Idempotency, Race conditions, Time zones, Operational telemetry through a written response exercise.
Reported interview periodN/A
A code-generation path drafts edits and a stronger model checks them. Decide which spans are accepted or rolled back, keep the result correct, and show whether the second pass actually saves time.
Practice focusSpeculative execution, Verification design, Rollback, Correctness, Benchmarking through a written response exercise.
Reported interview periodN/A
You get a short list of accepted two-word phrases and a batch of strings. Infer the rule that decides which strings belong together, implement it so the same input always yields the same partition, and say where the examples still underdetermine the answer.
Practice focusString algorithms, Specification recovery, Determinism, Edge-case analysis through a written response exercise.
Reported interview periodN/A
A story about slowing a launch because a safety check was thin.
Practice focusJudgment, A specific story through a written response exercise.
Reported interview periodN/A
A disagreement about training on customer text.
Practice focusDisagreement, Limits through a written response exercise.
Reported interview periodN/A
Two minutes on why this lab's work fits a project you have done.
Practice focusA concrete project through a written response exercise.
Reported interview periodN/A
What you would cut if the team lost half its people.
Practice focusPriorities, A hard conversation through a written response exercise.
Reported interview periodN/A
Where a design failed after launch, what you measured, and what you changed.
Practice focusA shipped system, Measurement through a written response exercise.
Reported interview periodN/A
Explain one result you trust, what would falsify it, and what was not shown.
Practice focusEvidence, Limits through a written response exercise.