SCIKEY Associate Tester Interview Questions and Answers

String buffer and string builder are both used for manipulating strings, but string builder is faster and not thread-safe.

• String buffer is synchronized, while string builder is not.

• String buffer is slower due to synchronization overhead.

• String builder is recommended for single-threaded scenarios.

• String buffer is recommended for multi-threaded scenarios.

• Both classes have similar methods for appending, inserting, and del