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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
Aggregate pass rates, enforce minimum support, and compare evaluation runs without hiding weak slices.
Practice focusPython, Aggregation, Evaluation, Statistical hygiene, Determinism through a runnable coding exercise.
Reported interview periodN/A
Review staged prompts that begin with a small in-memory worker, then introduce retries, duplication, cancellation, and process restarts.
Practice focusState modeling, Idempotency, Retry policy, Failure recovery, Operational reasoning through a written response exercise.
Reported interview periodN/A
Turn one real experience into a concise story, then answer increasingly specific follow-ups without inventing evidence.
Practice focusEvidence selection, Concise communication, Conflict, Reflection through a written response exercise.
Reported interview periodN/A
Build a defensible walkthrough of a project from problem framing to architecture, experiments, failures, and outcomes.
Practice focusArchitecture, Experiment design, Debugging, Metrics, Trade-offs through a written response exercise.
Reported interview periodN/A
Design a reproducible registry connecting datasets, evaluator configurations, model outputs, and reviewed results.
Practice focusData lineage, Versioning, Idempotency, Access control, Reproducibility through a written response exercise.
Reported interview periodN/A
Use one real experience to show how you made a consequential decision under incomplete evidence and designed a safe reversal path.
Practice focusJudgment, Evidence, Disagreement, Risk control, Reflection through a written response exercise.
Reported interview periodN/A
Prepare a technical project account that connects the initial claim, experiment design, implementation choices, failures, and shipped evidence.
Practice focusProblem framing, Experiment design, Architecture, Debugging, Evidence quality through a written response exercise.
Reported interview periodN/A
Design a sequence that stays fast to index, accepts mutation, and can crash at any point without losing the state a reader already saw. Then make the restart path provable rather than plausible.
Practice focusData structure design, Complexity analysis, Durability, Crash 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
An in-memory grade book with a ranking that does not treat a missing score as zero.
Practice focusState, Ranking, Edge cases through a written response exercise.
Reported interview periodN/A
Return the vials that stayed inside a temperature range for their whole stay.
Practice focusScanning, Missing data through a written response exercise.
Reported interview periodN/A
Collapse consecutive comments on the same path into one batch.
Practice focusOrder, Grouping through a written response exercise.
Reported interview periodN/A
Return one valid order of steps, or report a cycle.
Practice focusOrdering, Cycles through a written response exercise.
Reported interview periodN/A
Two people edit one note and need to see who wrote the last line.
Practice focusConflict, Failure through a written response exercise.
Reported interview periodN/A
Store a score per model run and show which run is ahead this week.
Practice focusRead path, Write path 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
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
Turn a folder of notes into a table of titles and word counts.
Practice focusA small program, What you left out 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.