Java Interview Questions · interview question

Which practice avoids a common mistake with Prefix Sums on Arrays?

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Silence the Prefix Sums on Arrays problem by using raw types, broad catches, or shared mutable state.Do not lose track of the zero-boundary case when turning an inclusive range into prefix subtraction.Ignore the Prefix Sums on Arrays issue and rely on team discipline instead of APIs or contracts.Prefer the version of Prefix Sums on Arrays that makes behavior less predictable as long as the code compiles.

Answer and explanation

Correct answer

B. Do not lose track of the zero-boundary case when turning an inclusive range into prefix subtraction.

Why

Do not lose track of the zero-boundary case when turning an inclusive range into prefix subtraction. This is a common failure mode in real Java code and a frequent interview follow-up.

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Which practice avoids a common mistake with Prefix Sums on Arrays?

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