All Hard Articles

Wheel Factorization Algorithm

Given a number N. The task is to check if the given number is Prime Number or not.Examples: Input: N = 987 Output: Not a Prime… Read More

Picked

Prime Number

Algorithms

C++ Programs

DSA

Mathematical

Sort an Array of Strings according to the number of Vowels in them

Given an array arr[] of N strings, the task is to sort these strings according to the numbers of vowels in them. Examples: Input: arr[]… Read More

vowel-consonant

DSA

School Programming

Sorting

Strings

Check whether nodes of Binary Tree form Arithmetic, Geometric or Harmonic Progression

Given a binary tree, the task is to check whether the nodes in this tree form an arithmetic progression, geometric progression or harmonic progression.Examples: Input:… Read More

Aptitude-Progressions

arithmetic progression

Geometric Progression

harmonic progression

Progressions

DSA

Mathematical

Pattern Searching

Tree

Difference between Basic Disk and Dynamic Disk

Basic Disk: A basic disk is a type of hard drive configuration, available with the Windows operating system. To manage all partitions and data on the… Read More

Difference Between

GATE CS

Operating Systems

Difference between AI and Soft Computing

Artificial Intelligence: AI manages more comprehensive issues of automating a system. This computerization should be possible by utilizing any field such as image processing, cognitive… Read More

Difference Between

Machine Learning

Dividing the rectangle into n right-angled triangles

Puzzle: Find all values of n > 1 for which one can divide a rectangle into n right-angled triangles. Answer: We can divide any rectangle… Read More

Shape Puzzles

DSA

Geometric

Puzzles

Difference between AI and Expert System

Artificial Intelligence: AI manages more comprehensive issues of automating a system. This computerization should be possible by utilizing any field such as image processing, cognitive… Read More

Difference Between

Machine Learning

Difference between Wifi and Internet

Wi-Fi and Internet are two completely different things. Wi-Fi is more sort of a facility that gives wireless Internet access to smartphones, computers, or other… Read More

Computer Networks

Difference Between

Node.js zlib.unzipSync() Method

The zlib.unzipSync() method is an inbuilt application programming interface of the Zlib module which is used to decompress a chunk of data with Unzip. Syntax:… Read More

Node.js-Zlib-module

Node.js

Web Technologies

Python OpenCV: Epipolar Geometry

The general setup of epipolar geometry. The gray region is the epipolar plane. The orange line is the baseline, while the two blue lines are… Read More

OpenCV

Python-OpenCV

Python

How to Create Image Lightbox Gallery using HTML CSS and JavaScript ?

A lightbox gallery is basically used to view the gallery images in detail specifically. You can code the JavaScript to do so but also we… Read More

JavaScript-Questions

JavaScript

Web Technologies

What is the correct JSON content type ?

Content-Type is an HTTP header that is used to indicate the media type of the resource and in the case of responses, it tells the… Read More

JSON

PHP-Misc

Picked

PHP

Web Technologies

How to read command line arguments in Node ?

Command-line arguments (CLI) consist of text strings utilized to provide extra information to a program during its execution via the command line interface of an… Read More

Node.js-Basics

Node.js-Misc

Node.js

Web Technologies

How to select an element with multiple classes using jQuery ?

There are two procedures to select an element with multiple classes by using jQuery. Both the procedures are described below with the proper example. Using… Read More

jQuery-Misc

JQuery

Web Technologies

Construct a matrix such that union of ith row and ith column contains every element from 1 to 2N-1

Given a number N, the task is to construct a square matrix of N * N where the union of elements in some ith row… Read More

Algorithms

Arrays

DSA

Mathematical

Matrix

Pattern Searching

Randomized

Common divisors of N numbers

Given an array arr[] of N integers. The task is to find all the common divisors of all N integers.Examples Input: arr[] = {6, 90,… Read More

divisors

GCD-LCM

Arrays

DSA

Mathematical

Stryker Interview Experience | Senior Software Engineer – Gurugram

Round 1: It was a skype round. Coding was done on a share screen. Questions were : Write copy ctor and assignment operator of a… Read More

Marketing

Stryker

Experiences

Interview Experiences

Livspace Interview Experience | Frontend SDE-I (Bangalore)

Position : SDE I (Frontend) Location : Bangalore, India. Date : 14th December, 2019. Round 1: Design game, Snake and Its Food (Ball) from old… Read More

Livspace

Marketing

Experiences

Interview Experiences

Swap Kth node from beginning with Kth node from end in a Doubly Linked List

Prerequisites: Doubly Linked List Given a doubly-linked list, the task is to swap Kth node from the beginning with Kth node from the ending.Note: Please note… Read More

doubly linked list

DSA

Java

Linked List

Sideways traversal of a Complete Binary Tree

Given a Complete Binary Tree, the task is to print the elements in the following pattern. Let’s consider the tree to be: The tree is… Read More

Binary Tree

Complete Binary Tree

Tree Traversals

Algorithms

Data Structures

DSA

Tree