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Advanced Python · interview question

A bug appears around timing and audit scopes. What is the strongest first debugging move?

Multiple choiceHardchapter-14-curatedpremiumadvanced-pythontiming-and-audit-scopes
python
import time

def timed(fn):
    def wrapper(*args, **kwargs):
        started = time.perf_counter()
        try:
            return fn(*args, **kwargs)
        finally:
            print(time.perf_counter() - started)
    return wrapper
Choose one answer
Answer and explanation

Correct answer

D. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.

Why

That approach is reliable because it creates evidence. If instrumentation changes the business logic shape too much, the abstraction is working against you.

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