All Hard Articles

Understanding Lvalues, PRvalues and Xvalues in C/C++ with Examples

LValue and RValue in C Background Quite a few of you who are about to read this article, might be looking for clarification of what… Read More

C++

C++ Programs

Difference Between

Program for Preemptive Priority CPU Scheduling

Implementing priority CPU scheduling. In this problem, we are using Min Heap as the data structure for implementing priority scheduling. In this problem smaller numbers… Read More

cpu-scheduling

Advanced Data Structure

Arrays

DSA

Heap

Operating Systems

CSS Text Formatting

The CSS text formatting properties are used to format text, style the text, and perform different types of manipulations like word spacing, alignment, justification, and… Read More

CSS-Basics

CSS

Web Technologies

Tiling with Dominoes

Given a 3 x n board, find the number of ways to fill it with 2 x 1 dominoes.Example 1: Following are all the 3… Read More

C++

C++ Programs

Competitive Programming

DSA

Dynamic Programming

Java

Recursion

AWS EC2 Instance Setup with Apache Server

Amazon Web Services (AWS): Amazon Web Services (AWS) is a secure cloud services platform, offering compute power, database storage, content delivery and other functionality to… Read More

Amazon

TechTips

Web Technologies

Pairs whose concatenation contain all digits

Given an array of n numbers. The task is to find the number of pairs that can be taken from the given which on concatenation… Read More

number-digits

Bit Magic

DSA

Strings

Traversal of tree with k jumps allowed between nodes of same height

There is a tree with N nodes and node 1 is the root node. Each node of the tree can contain fruit or not. Initially,… Read More

Algorithms

Competitive Programming

DSA

Dynamic Programming

Tree

Range Queries for Longest Correct Bracket Subsequence Set | 2

Given a bracket sequence or in other words a string S of length n, consisting of characters ‘(‘ and ‘)’. Find the length of the… Read More

cpp-stack

expression-evaluation

Arrays

DSA

Stack

Palindrome by swapping only one character

Given a string, the task is to check if the string can be made palindrome by swapping a character only once. [NOTE: only one swap… Read More

DSA

Mathematical

Minimum increment/decrement to make array non-Increasing

Given an array a, your task is to convert it into a non-increasing form such that we can either increment or decrement the array value… Read More

cpp-priority-queue

priority-queue

Algorithms

DSA

Greedy

Heap

Salesforce Interview Experience | Set 5 (On-Campus)

Salesforce came to our college to hire for Full time Software Engineer role. The process was open to only Computer Science students with an aggregate… Read More

Experiences

Interview Experiences

Middle term in the binomial expansion series

Given three integers A, X, and n. The task is to find the middle term in the binomial expansion series. Examples: Input : A =… Read More

binomial coefficient

series

DSA

Mathematical

ISRO | ISRO CS 2009 | Question 32

The feature in object-oriented programming that allows the same operation to be carried out differently, depending on the object, is: (A) Inheritance (B) Polymorphism (C)… Read More

ISRO

HTML5 Game Development | Infinitely Scrolling Background

Game Design and Development is an emerging industry. Although making AAA titles will require advanced knowledge of game engines, DirectX, OpenGL, etc. small HTML5 video… Read More

HTML5

HTML

Web Technologies

Swap two numbers in PL/SQL

In PL/SQL code groups of commands are arranged within a block. A block group related declarations or statements. In declare part, we declare variables and… Read More

SQL-PL/SQL

SQL

Sum of bitwise AND of all possible subsets of given set

Given an array, we need to calculate the Sum of Bit-wise AND of all possible subsets of the given array. Examples: Input : 1 2… Read More

Bitwise-AND

Bit Magic

DSA

Count binary strings with twice zeros in first half

We are given an integer N. We need to count the total number of such binary strings of length N such that the number of… Read More

binary-string

Combinatorial

DSA

Strings

Optional Class | Guava | Java

Introduction : Optional is an immutable object that may contain a non-null reference to another object. Each instance of this type either contains a non-null… Read More

Misc

Routing in Angular JS using Angular UI Router

AngularJS is a front-end web application framework based on JavaScript and is maintained by Google. AngularJS interprets the attributes of HTML as directives to bind… Read More

JavaScript-Questions

JavaScript

Web Technologies

OpenGL Rendering Pipeline | An Overview

Rendering Pipeline is the sequence of steps that OpenGL takes when rendering objects. Vertex attribute and other data go through a sequence of steps to… Read More

GBlog

Misc