Question
When should a Java developer choose Prefix Sums on Arrays deliberately?
- Choose Prefix Sums on Arrays mainly when you want to postpone validation and fix problems manually later.
- Use prefix sums when interview problems ask many subarray totals, balance checks, or counts over repeated ranges.
- Choose Prefix Sums on Arrays whenever you want the code to look more advanced, even if the design gets less clear.
- Choose Prefix Sums on Arrays only to avoid modeling domain rules explicitly in Java code.
Hint
Think about the production scenario where the choice genuinely improves the code.
Answer and rationale
Correct answer: B. Use prefix sums when interview problems ask many subarray totals, balance checks, or counts over repeated ranges.
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.
Track: Java