GeeksforGeeks

Commonly Asked Data Structure Interview Questions on Strings

Last Updated: 28 February 2025

Strings are essential data structures used to represent sequences of characters and are frequently encountered in coding interviews. Questions often focus on string manipu...read more

Check for Binary String

Last Updated: 23 November 2024

Given a string s, the task is to check if it is a binary string or not. A binary string is a string which only contains the characters '0' and '1'.Examples:Input: s = "010...read more

Strings

strings

DSA

Concatenation of Two Strings

Last Updated: 31 October 2024

String concatenation is the process of joining two strings end-to-end to form a single string.ExamplesInput: s1 = “Hello”, s2 = “World”Output: “HelloWorld”Explanation: Joi...read more

School Programming

strings

CSES Solutions - Letter Pair Move Game

Last Updated: 19 May 2024

There are 2n boxes in a line. Two adjacent boxes are empty, and all other boxes have a letter "A" or "B". Both letters appear in exactly n-1 boxes.Your task is to move the...read more

Competitive Programming

Check string for all uppercase-lowercase or first uppercase and rest lowercase characters

Last Updated: 28 March 2024

Given a string S, the task is to check if all the characters in S are in lowercase, or all the characters are in uppercase or only the first character is in uppercase, and...read more

Strings

strings

DSA

How to Convert a String to an Long in Java ?

Last Updated: 26 February 2024

In Java, String to Integer Conversion is not always effective as the size of the String can overpass Integer. In this article, we will learn the method provided by the Lon...read more

How to Remove Duplicates from a String in Java Using Hashing?

Last Updated: 12 February 2024

Working with strings is a typical activity in Java programming, and sometimes we need to remove duplicate characters from a string. Using hashing is one effective way to d...read more

How to Remove Duplicates from a String in Java?

Last Updated: 12 February 2024

Working with strings is a typical activity in Java programming, and sometimes we need to remove duplicate characters from a string. In this article we have given a string,...read more

How to Remove Duplicates from a String in Java Using Regex ?

Last Updated: 12 February 2024

In Java programming, Regex (regular expressions) is a very important mechanism. It can be used to match patterns in strings. Regular expressions provide a short and simple...read more

How to Convert a String to an Numeric in Java?

Last Updated: 12 February 2024

In Java programming, there are situations in which we must convert a string of numeric characters into one of the following data types: double, float, long, or int. To exe...read more

How to Find the Intersection of Two Strings in Java?

Last Updated: 12 February 2024

We know that the Strings are a collection of characters so if we want to find the intersection of two Strings the simple way is we can compare each character of the first ...read more

How to Check if a String contains only ASCII in Java?

Last Updated: 12 February 2024

The full form of ASCII is the American Standard Code for Information Interchange. It is the numeric representation of Character. As Java supports multiple languages, and i...read more

Java Program to Capitalize the First Letter of Each Word in a String

Last Updated: 07 February 2024

In Java Programming, we can be able to capitalize the first letter of each word in the given String value by using toUpperCase(), toLowerCase(), and another one is substri...read more

How to Shuffle Characters in a String in Java?

Last Updated: 31 January 2024

In this article, we will learn how to shuffle characters in a String by using Java programming. For this, we have taken a String value as input and the method is available...read more

Minimize operations to restore original string by permutation

Last Updated: 05 March 2024

Given a string S and permutation P, both of length N. In one operation you can change the position of each and every character of the string from S[i] to S[P[i]]. Determin...read more

Competitive Programming

Geeks Premier League 2023