Memory · interview question

If you wrote a test around long-lived objects, what should the test prove first?

Multiple choiceHardchapter-16-curatedpremiummemorylong-lived-objects

python

cache = []
for row in rows:
    cache.append(row)  # keeps every row alive for the whole process

Solve the symptom with comments only and avoid changing the code shape around long-lived objects.That the rule behaves correctly at the boundary cases the lesson is trying to make explicit.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Keep long-lived objects implicit so the script stays short and hope the next engineer infers the rule.

Answer and explanation

Correct answer

B. That the rule behaves correctly at the boundary cases the lesson is trying to make explicit.

Why

Good tests make the design safer to change because they lock in the meaningful behavior rather than surface-level implementation details.

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If you wrote a test around long-lived objects, what should the test prove first?

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