In this article, we discuss 20 frequently asked String programming interview questions in Java.

Here are the Frequently asked String programming interview questions :

1. Find all character permutations of a String in Java. (Solution)

 

2. Java program to check if two strings are anagrams (Solution)

 

3. How to check if a String is a Palindrome in Java ? (Solution)

 

4. Different methods of String concatenation in java (Solution)

 

5. How to reverse a string in Java ? (Solution)

 

6. Different ways to split a string in Java : (Solution)

 

7. How to count frequency of each character in a String in Java ? (Solution)

 

8. How to reverse each word of a String in Java ? (Solution)

 

9. How to replace all spaces in a string with ‘%20’ in Java ? (Solution)

 

10. How to find all possible sub-strings in a String in Java ? (Solution)

 

11. Java program to reverse a String using recursion (Solution)

 

12. Java program to calculate length of a String using recursion (Solution)

 

13. Java algorithm to search for a substring in a String (Solution)

 

14. How to check if a string has matching pair of parentheses or not ? (Solution)

 

15. Java program to determine if a string has all unique characters or not (Solution)

 

16. How to convert a String to int in Java ? (Solution)

 

17. Java program to determine if a string has all unique characters or not (Solution)

 

18. Java program to find duplicate characters in a string (Solution)

 

19. Java program to check whether one string is a rotation of another (Solution)

 

20. Java program to find longest substring without repeating characters in the given string (Solution)

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