Testing · interview question

What is the healthiest performance judgment around parameterized tests?

Multiple choiceMediumchapter-9-curatedpremiumtestingparameterized-tests

python

import pytest

@pytest.mark.parametrize("subtotal,expected", [(50, 6.5), (120, 0)])
def test_shipping_fee(subtotal: float, expected: float) -> None:
    assert shipping_fee(subtotal) == expected

Solve the symptom with comments only and avoid changing the code shape around parameterized tests.Keep parameterized tests implicit so the script stays short and hope the next engineer infers the rule.Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.Delay clarity until production traffic reveals the edge case and then patch it under pressure.

Answer and explanation

Correct answer

C. Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.

Why

Premature optimization is usually weaker than targeted optimization backed by measurement.

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What is the healthiest performance judgment around parameterized tests?

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