Coach note

Coding questions test whether you can carry a problem from a vague spec to a working solution while talking through your decisions. Interviewers watch the process at least as much as the answer.

Coding · Data Structures

Implement an in-memory key-value store that supports get, set, and nested transactions: begin, commit, and rollback. A rollback undoes everything since the matching begin.

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Implement an in-memory key-value store that supports get, set, and nested transactions: begin, commit, and rollback. A rollback undoes everything since the matching begin.

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