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Java: Which statement about HashSet vs TreeSet is the strongest interview answer?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which statement about HashSet vs TreeSet is the strongest interview answer?

  1. HashSet vs TreeSet is mostly a naming style choice and has little effect on runtime or design.
  2. HashSet vs TreeSet exists mainly to reduce the number of Java files in a project.
  3. HashSet vs TreeSet matters only for frontend frameworks, not for core Java applications.
  4. HashSet gives fast uniqueness without order, while TreeSet maintains sorted order with comparison-based cost.

Hint

Start with the core rule behind HashSet vs TreeSet.

Answer and rationale

Correct answer: D. HashSet gives fast uniqueness without order, while TreeSet maintains sorted order with comparison-based cost.

HashSet gives fast uniqueness without order, while TreeSet maintains sorted order with comparison-based cost. This is the base concept interviewers commonly test first.

Track: Java