Python Interview Questions · interview question
Which statement about Prefix Sums is the strongest interview answer?
Multiple choiceEasypython-interview-2026interviewpythonstatement
Answer and explanation
Correct answer
D. A prefix-sum structure stores running totals so many range-sum queries can be answered with subtraction instead of rescanning.
Why
A prefix-sum structure stores running totals so many range-sum queries can be answered with subtraction instead of rescanning. This is the base concept interviewers commonly test first.
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