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Java: Which statement about StringBuilder vs StringBuffer is the strongest interview answer?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which statement about StringBuilder vs StringBuffer is the strongest interview answer?

  1. StringBuilder vs StringBuffer is mostly a naming style choice and has little effect on runtime or design.
  2. StringBuilder vs StringBuffer exists mainly to reduce the number of Java files in a project.
  3. Both are mutable string helpers, but StringBuffer synchronizes methods while StringBuilder does not.
  4. StringBuilder vs StringBuffer matters only for frontend frameworks, not for core Java applications.

Hint

Start with the core rule behind StringBuilder vs StringBuffer.

Answer and rationale

Correct answer: C. Both are mutable string helpers, but StringBuffer synchronizes methods while StringBuilder does not.

Both are mutable string helpers, but StringBuffer synchronizes methods while StringBuilder does not. This is the base concept interviewers commonly test first.

Track: Java