In the ever-evolving world of software development, Java remains a cornerstone language, and mastering its String class is a crucial skill for any aspiring Java developer. String manipulation is a fundamental aspect of programming, and it’s no surprise that Java String interview questions are a common feature in technical interviews. In this comprehensive guide, we’ll explore the top 50
Java String interview Questions and Answers with example| Immutable | Most Asked | Code Decode
FAQ
How to solve a string problem in Java?
Java provides a Pattern class and a Matcher class that you can use to work with regular expressions. Use a sliding window: A sliding window is a common technique for solving string problems. It involves maintaining a “window” of characters in the string and moving the window to the right or left to find a solution.
Why String class is final in Java Interview Questions?
The String is immutable, so its value cannot be changed. If the String doesn’t remain immutable, any hacker can cause a security issue in the application by changing the reference value. The String is safe for multithreading because of its immutableness.
How do you approach a string problem?
The optimal way to approach any substring problem is to use two start & end pointers and slide the substring based on the problems constraints. This will help to access each substring and reserve the optimal O(n) time complexity for the problem.
