All Hard Articles

Total time required to travel a path denoted by a given string

Given a string path consisting of characters ‘N’, ‘S’, ‘E’ and ‘W’ denoting 1 unit movement in North, South, East, and West directions respectively, the… Read More

cpp-set

Competitive Programming

DSA

Hash

Mathematical

Searching

Strings

Limits by Direct Substitution

Limits are building blocks of calculus. They are the values that a function seems to be taking on while we reach a particular point. They… Read More

Picked

Class 11

Mathematics

School Learning

Generate a Random Birthday Wishes using JavaScript

In this article, we are going to learn how to create a webpage that generates random Birthday wishes using HTML, CSS, and JavaScript. Approach: To… Read More

JavaScript-Projects

JavaScript

Web Technologies

Amazon Interview Experience

Round 1(Coding Round): Given a binary tree, where every node points to its parent node and the parent of root is null. You have given… Read More

Amazon

Experiences

Interview Experiences

Introduction of IEEE 802.15.4 Technology

IEEE 802.15.4 is a low-cost, low-data-rate wireless access technology for devices that are operated or work on batteries. This describes how low-rate wireless personal area… Read More

IoT

Computer Networks

Minimize sum of product of same-indexed elements of two arrays by reversing a subarray of one of the two arrays

Given two equal-length arrays A[] and B[], consisting only of positive integers, the task is to reverse any subarray of the first array such that… Read More

array-rearrange

subarray

Arrays

DSA

Greedy

Mathematical

Pattern Searching

Maximize count of distinct profits possible by N transactions

Given three integers N, X, and Y, representing the total number of transactions, minimum and maximum profit respectively, the task is to find the count… Read More

DSA

Greedy

Mathematical

How to create a list of files, folders, and subfolders in Excel using Python ?

In this article, we will learn How to create a list of Files, Folders, and Sub Folders and then export them to Excel using Python.… Read More

Picked

Python directory-program

Python-excel

Python

Count substrings having frequency of a character exceeding that of another character in a string

Given a string S of size N consisting of characters a, b, and c only, the task is to find the number of substrings of… Read More

frequency-counting

Segment-Tree

substring

DSA

Mathematical

Recursion

Searching

Strings

Tree

Consensus Clustering

In this article, we’ll begin by providing a concise overview of clustering and its prevalent challenges. Subsequently, we’ll explore how consensus clustering serves as a… Read More

AI-ML-DS With Python

ML-Clustering

AI-ML-DS

Machine Learning

Create a two-dimensional array of sequence of even integers in R

In this article, we will discuss how to create a 2D array of sequences of even integers in R Programming Language. Method 1 : Using… Read More

Picked

R-Arrays

R Language

R Programs

How to Clear RAM Memory Cache, Buffer and Swap Space on Linux

RAM memory is a very important component of the computer system. it helps store data and code currently used by the operating system. This article… Read More

linux-command

Picked

Linux-Unix

Dual Support Vector Machine

Pre-requisite: Separating Hyperplanes in SVM The Lagrange multiplier equation for the support vector machine. The equation of that can be given by: Now, according to… Read More

Machine Learning

Python

Python program display any message on heart

This article focuses on discussing how to draw a heart with a beautiful message to your loved ones to express what you feel about them.… Read More

python

Python

Python Programs

Goldman Sachs Interview Experience | Bangalore 2021

Round 1(Online Assessment): (HackerRank) Two medium problems.I don’t remember the exact problems but one was based on priority queue and other was a DP problem.… Read More

Goldman Sachs

Experiences

Interview Experiences

Check if a triplet of buildings can be selected such that the third building is taller than the first building and smaller than the second building

Given an array arr[] consisting of N integers, where each array element represents the height of a building situated on the X co-ordinates, the task… Read More

cpp-stack

cpp-stack-functions

Arrays

DSA

Mathematical

Misc

Stack

Difference Between 32-bit and 64-bit JVM in Java

One does not need to know the difference unless developing a performance-critical application. The minor distinction between 32-bit and 64-bit JVMs would make little difference… Read More

Picked

Difference Between

Java

How to extract the user name from the email ID using PHP ?

Given a string email address, extract the username. Input: ‘priyank@geeks.com’ Output: priyank Input: ‘princepriyank@gfg.com’ Output: princepriyank Approach 1: Using PHP strstr() to extract the username… Read More

PHP-function

PHP-Questions

Picked

PHP

Web Technologies

How to count rows in MySQL table in PHP ?

PHP stands for hypertext preprocessor. MySQL is a database query language used to manage databases. In this article, we are going to discuss how to… Read More

PHP-function

PHP-Questions

Picked

PHP

Web Technologies

How to display string values within a table using PHP ?

A table is an arrangement of data in rows and columns, or possibly in a more complex structure. Tables are widely used in communication, research,… Read More

PHP-function

PHP-Questions

PHP-string

Picked

PHP

Web Technologies