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Java: In Java, which comparison about ConcurrentSkipListMap is accurate?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

In Java, which comparison about ConcurrentSkipListMap is accurate?

  1. It provides sorted-map behavior that ConcurrentHashMap does not, though ordered operations cost more than plain hash lookup.
  2. There is no practical difference in behavior, performance, or API design when ConcurrentSkipListMap is involved.
  3. The oldest option related to ConcurrentSkipListMap is always the right production choice regardless of context.
  4. Differences around ConcurrentSkipListMap are mostly cosmetic, so correctness and maintainability do not change.

Hint

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

Answer and rationale

Correct answer: A. It provides sorted-map behavior that ConcurrentHashMap does not, though ordered operations cost more than plain hash lookup.

It provides sorted-map behavior that ConcurrentHashMap does not, though ordered operations cost more than plain hash lookup. This is the comparison that usually separates memorization from understanding.

Track: Java