Question
When should a Java developer choose StringBuilder vs StringBuffer deliberately?
- Use StringBuilder when constructing text repeatedly within one thread, especially inside loops.
- Choose StringBuilder vs StringBuffer mainly when you want to postpone validation and fix problems manually later.
- Choose StringBuilder vs StringBuffer whenever you want the code to look more advanced, even if the design gets less clear.
- Choose StringBuilder vs StringBuffer only to avoid modeling domain rules explicitly in Java code.
Hint
Think about the production scenario where the choice genuinely improves the code.
Answer and rationale
Correct answer: A. Use StringBuilder when constructing text repeatedly within one thread, especially inside loops.
Use StringBuilder when constructing text repeatedly within one thread, especially inside loops. Interviewers often ask this to see whether you can connect the concept to real design decisions.
Track: Java