Java Interview Questions · interview question
When should a Java developer choose Prefix Sums on Arrays deliberately?
Multiple choiceMediumjava-interview-2026interviewjavause
Answer and explanation
Correct answer
B. Use prefix sums when interview problems ask many subarray totals, balance checks, or counts over repeated ranges.
Why
Use prefix sums when interview problems ask many subarray totals, balance checks, or counts over repeated ranges. Interviewers often ask this to see whether you can connect the concept to real design decisions.
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