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 · System Reasoning

Write a function that parses an ISO 8601 duration string like 'PT1H30M' and returns total minutes. Handle missing components and call out malformed inputs.

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Write a function that parses an ISO 8601 duration string like 'PT1H30M' and returns total minutes. Handle missing components and call out malformed inputs.

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