Quick Sort Program in Java
In this article, we will write a quick sort program in Java. We will understand the partition procedure, the quicksort algorithm, and its worst-case and best-case analysis, and will write...
Recursion Program in Java
In this article, we will write a recursion program in Java. We will understand the meaning of recursion, how the recursion call stack works, and the base condition in recursion,...
Stack Program in Java
In this article, we will write a Stack program in Java. We will learn about the stack class in Java, how to create a stack, different methods of a stack...
Most Used Operating System Examples
In this article, we are going to see the most used operating system examples. We will discuss the following most used operating system examples; Windows, Linux, Android, Apple iOS, Apple...
Functions of Operating System
In this article, we will discuss the functions of operating system. We will discuss how the operating system acts as a resource manager, provides security, manages storage, etc. So, let’s...
Indexing in DBMS
Indexing in DBMS is a very important aspect because of the benefits that it has. In this article, we will discuss what is indexing in DBMS. We will also cover...
OOPS Concepts in Java with Examples
In this article, we will discuss the OOPS concepts in Java with examples. We will discuss different OOPS concepts in Java with examples like Classes, Objects, and Constructors, and we...
Collections in Java
In this article, we are going to discuss collections in Java. We will discuss the basics of collections framework in Java, different collections classes, collections interfaces, etc. Also, we will...
OOPS Concepts in C++ with Examples
In this article, we will discuss the OOPS concepts in C++. We will discuss what is OOPS, what classes and objects in OOPS are, and the 4 pillars of OOPS...
Java Program to Check Prime Number
In this article, we will discuss the problem of identifying a prime number in Java. We will discuss the definition and meaning of prime numbers, 3 different ways to identify...
Java Program to Reverse a Number
In this article, we will learn to reverse a number in Java. We will understand how to reverse a number in Java and we will write the program to reverse...
Java Program to Print the Elements of an Array in Reverse Order
In this article, we are going to discuss “How to reverse an array in Java”. You are given an array of integers. Your task is to output the array in...
Largest rectangular Area in Histogram – Set 2
Problem Statement You will be given an array that represents a histogram. The values of the array represent the height of the bars of the histogram and the width of...
Data Structures in Java | Queue | Heap
Data structure refers to a collection of data with well-defined operationsIn this article, we’ll be discussing Data structures in Java, The term data, behaviour, or properties. A data structure is...
Data Structures in Java | Array | Linked List | Stack
Introduction: Data structures in Java are an essential aspect of Computer Science. There are different types of data structures that help us store the data in different ways in the...
Comprehensive Guide to Cardinality in DBMS
Introduction: When we talk about Database Management Systems (DBMS), or we deal with databases (SQL or No-SQL), we often hear the term cardinality. It is a very important term in...
Iterative Postorder Traversal | Set 1 (Using Two Stacks)
Problem Statement You are given a binary tree. Your task is to print the postorder traversal of the tree iteratively, using 2 stacks. Example Consider the tree given below. The...
Check if an Array is Stack Sortable
Problem Statement You will be given an array A of integers containing N elements. All the elements inside the array are unique and in the range of 1 to N,...
Count Subarrays where Second Highest lies before Highest
Problem Statement You will be given an array of N distinct elements. The minimum value of N is 2. In every subarray of the given array, you have to find...
Reverse Individual Words
Problem Statment You are given a string. This string contains many words that are space separated. You have to reverse each word in the string individually. Examples The input string...
Expression Evaluation
Problem Statement You will be given a string representing a mathematical expression. You have to evaluate it and return the result. Some Constraints The input string will be in Infix...
The Celebrity Problem
Problem Statement There is a party of N (numbered 0 to N-1) people. There might or might not be a celebrity at this party. A celebrity is someone who is...
Maximum Product of Indexes of next greater on Left and Right
Problem Statement You are given an array A. Let us say that the array has indices from 1 to N. For each index i in the array: The quantity L(i)...
Number of NGEs to the Right
Problem Statement You will be given an array of N integers. You will also be given an Integer Q denoting the number of queries. Then, you will have Q queries...