Frontier AI Technical Interview Question Bank

Question groups

Topics

Independent and not affiliated with the companies represented. Collected material does not predict future interview questions.

2 questions

Every question has a public brief with the task, constraints, and follow-ups. Labels describe interactive practice access.

New public brief

Topic tags
Python
Data structures
Communication

xAICoding

Python codingWebAssembly + public tests

Reported interview periodApr 2026

Resumable Iterators

Implement an iterator over a copied list that can serialize its position and later resume at the next not-yet-yielded item. Then compose the same behavior across a sequence of lists.

Practice focusSaved state points to the next item, never the last item returned. A completed iterator restores completed. State must be serializable and restoration must not repeat or skip values. The chain state records both the current group and the position within it. Use exactly {"index": integer} for list state and {"outer": integer, "inner": {"index": integer}} for chain state. Reject malformed keys, booleans/nonintegers and negative or out-of-range active indices with ValueError .…

Public brief

Topic tags
Python
Algorithms
Data structures
Product design
Communication

Coding exerciseCodingAI-generated

Runnable coding45 min

Reported interview periodN/A

Interval calendar

Reason about half-open intervals through conflicts, room counts, merging, and free slots.

Practice focusPython, Sorting, Intervals, Heaps, Edge cases through a runnable coding exercise.

Loading the question catalog…

Question groups

Topics

Independent and not affiliated with the companies represented. Collected material does not predict future interview questions.

2 questions

Every question has a public brief with the task, constraints, and follow-ups. Labels describe interactive practice access.

New public brief

Topic tags
Python
Data structures
Communication

xAICoding

Python codingWebAssembly + public tests

Reported interview periodApr 2026

Resumable Iterators

Implement an iterator over a copied list that can serialize its position and later resume at the next not-yet-yielded item. Then compose the same behavior across a sequence of lists.

Practice focusSaved state points to the next item, never the last item returned. A completed iterator restores completed. State must be serializable and restoration must not repeat or skip values. The chain state records both the current group and the position within it. Use exactly {"index": integer} for list state and {"outer": integer, "inner": {"index": integer}} for chain state. Reject malformed keys, booleans/nonintegers and negative or out-of-range active indices with ValueError .…

Public brief

Topic tags
Python
Algorithms
Data structures
Product design
Communication

Coding exerciseCodingAI-generated

Runnable coding45 min

Reported interview periodN/A

Interval calendar

Reason about half-open intervals through conflicts, room counts, merging, and free slots.

Practice focusPython, Sorting, Intervals, Heaps, Edge cases through a runnable coding exercise.

Frontier AI technical interview question bank.

Frontier AI technical interview question bank.

Resumable Iterators

Interval calendar

Resumable Iterators

Interval calendar