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Java: Which statement about HashSet Membership and Deduplication is the strongest interview answer?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which statement about HashSet Membership and Deduplication is the strongest interview answer?

  1. HashSet Membership and Deduplication is mostly a naming style choice and has little effect on runtime or design.
  2. HashSet is a hash-based structure for fast membership tests and uniqueness enforcement.
  3. HashSet Membership and Deduplication exists mainly to reduce the number of Java files in a project.
  4. HashSet Membership and Deduplication matters only for frontend frameworks, not for core Java applications.

Hint

Start with the core rule behind HashSet Membership and Deduplication.

Answer and rationale

Correct answer: B. HashSet is a hash-based structure for fast membership tests and uniqueness enforcement.

HashSet is a hash-based structure for fast membership tests and uniqueness enforcement. This is the base concept interviewers commonly test first.

Track: Java