Knowledge Factory

Here's a comprehensive Java String, StringBuilder, and StringBuffer Interview Guide with essential concepts and frequently asked interview questions for a fresher: Essential Concepts to Understand: String Class: Immutable : Once created, its value cannot be changed. String Pool : Optimizes memory by storing unique String objects. Operations like concatenation create new String objects rather than modifying the original. StringBuilder Class: Mutable : Can modify its content without creating new objects. Not thread-safe : It is faster in single-threaded contexts due to the absence of synchronization. Preferred when frequent string modifications (like appending or inserting) are required. StringBuffer Class: Mutable : Similar to StringBuilder but synchronized for thread safety. Thread-safe : Ideal when multiple threads may modify the string, but slightly slower due to synchronization. Commonly Asked Interview Questions and Answers: 1. What differentiates String , StringBuilder , a...