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Python: In Python, which comparison about Prefix Sums is accurate?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

In Python, which comparison about Prefix Sums is accurate?

  1. There is no practical difference in behavior, performance, or maintainability when Prefix Sums is involved.
  2. The oldest option related to Prefix Sums is always the right production choice regardless of workload or context.
  3. Differences around Prefix Sums are mostly cosmetic, so correctness and debugging quality do not really change.
  4. Prefix sums front-load preprocessing cost, while naive repeated range scans pay linear cost over and over again.

Hint

Focus on the behavior or tradeoff, not just the keyword.

Answer and rationale

Correct answer: D. Prefix sums front-load preprocessing cost, while naive repeated range scans pay linear cost over and over again.

Prefix sums front-load preprocessing cost, while naive repeated range scans pay linear cost over and over again. This is the comparison that usually separates memorization from understanding.

Track: Python