Java Interview Questions · interview question
Which statement about Prefix Sums on Arrays is the strongest interview answer?
Multiple choiceEasyjava-interview-2026interviewjavastatement
Answer and explanation
Correct answer
D. A prefix-sum array stores running totals so a range sum can be answered with subtraction instead of rescanning the range.
Why
A prefix-sum array stores running totals so a range sum can be answered with subtraction instead of rescanning the range. This is the base concept interviewers commonly test first.
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