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Java: Which statement about Trie and Prefix Tree is the strongest interview answer?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which statement about Trie and Prefix Tree is the strongest interview answer?

  1. Trie and Prefix Tree is mostly a naming style choice and has little effect on runtime or design.
  2. Trie and Prefix Tree exists mainly to reduce the number of Java files in a project.
  3. A trie stores strings by shared prefixes so common beginnings reuse the same path.
  4. Trie and Prefix Tree matters only for frontend frameworks, not for core Java applications.

Hint

Start with the core rule behind Trie and Prefix Tree.

Answer and rationale

Correct answer: C. A trie stores strings by shared prefixes so common beginnings reuse the same path.

A trie stores strings by shared prefixes so common beginnings reuse the same path. This is the base concept interviewers commonly test first.

Track: Java