[Solved] Which of the following is true about StringBuilder and StringBuffer in Java? — Ans: StringBuffer is synchronized, StringBuilder is not. | Java

Java - Strings and String Handling

Which of the following is true about StringBuilder and StringBuffer in Java?

ABoth are immutable classes.

B<code>StringBuffer</code> is synchronized, <code>StringBuilder</code> is not.

C<code>StringBuilder</code> is synchronized, <code>StringBuffer</code> is not.

DBoth classes are used to create arrays.

Step-by-Step Solution

Solution:

Step 1: Understand synchronization difference
StringBuffer methods are synchronized, making it thread-safe, while StringBuilder is not synchronized.
Step 2: Check mutability and usage
Both classes are mutable and used for building strings, not arrays.
Final Answer:
StringBuffer is synchronized, StringBuilder is not. -> Option B
Quick Check:
Synchronization = StringBuffer is synchronized, StringBuilder is not. [OK]

Quick Trick: Remember: Buffer is thread-safe, Builder is faster [OK]

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