Python Fundamentals · interview question

A bug appears around f-strings and output formatting. What is the strongest first debugging move?

Multiple choiceEasychapter-1-curatedpremiumpython-fundamentalsf-strings-and-output-formatting

python

subtotal = 119.97
shipping = 0
print(f"Subtotal: {subtotal:.2f} | shipping: {shipping:.2f}")

Delay clarity until production traffic reveals the edge case and then patch it under pressure.Keep f-strings and output formatting implicit so the script stays short and hope the next engineer infers the rule.Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.Solve the symptom with comments only and avoid changing the code shape around f-strings and output formatting.

Answer and explanation

Correct answer

C. 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. Messy output makes a correct script harder to trust because the operator cannot tell which number belongs to which rule.

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A bug appears around f-strings and output formatting. What is the strongest first debugging move?

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