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Python: In Python, which comparison about Sets and Membership Testing is accurate?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

In Python, which comparison about Sets and Membership Testing is accurate?

  1. There is no practical difference in behavior, performance, or maintainability when Sets and Membership Testing is involved.
  2. A set discards duplicates and order, while a list preserves order but makes repeated membership checks more expensive.
  3. The oldest option related to Sets and Membership Testing is always the right production choice regardless of workload or context.
  4. Differences around Sets and Membership Testing are mostly cosmetic, so correctness and debugging quality do not really change.

Hint

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

Answer and rationale

Correct answer: B. A set discards duplicates and order, while a list preserves order but makes repeated membership checks more expensive.

A set discards duplicates and order, while a list preserves order but makes repeated membership checks more expensive. This is the comparison that usually separates memorization from understanding.

Track: Python