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Java: Which statement about Union-Find and Disjoint Set is the strongest interview answer?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which statement about Union-Find and Disjoint Set is the strongest interview answer?

  1. Union-Find and Disjoint Set is mostly a naming style choice and has little effect on runtime or design.
  2. Union-Find and Disjoint Set exists mainly to reduce the number of Java files in a project.
  3. Union-Find and Disjoint Set matters only for frontend frameworks, not for core Java applications.
  4. Union-find tracks which elements belong to the same connected component through representative parents.

Hint

Start with the core rule behind Union-Find and Disjoint Set.

Answer and rationale

Correct answer: D. Union-find tracks which elements belong to the same connected component through representative parents.

Union-find tracks which elements belong to the same connected component through representative parents. This is the base concept interviewers commonly test first.

Track: Java