All Hard Articles

Servlet – Web Application

Servlets are the Java programs that run on the Java-enabled web server or application server. They are used to handle the request obtained from the… Read More

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java-servlet

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Java

Git – Difference Between HEAD, Working Tree and Index

Git as a version-control-system manages and manipulates three trees in its normal operation: HEAD: Last commit snapshot, next parent Index: Proposed next commit snapshot Working… Read More

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Difference Between

Git

What is Apache Flink?

In the current generation, Apache Flink is the big giant tool that is nothing but 4G of Big Data. It’s the true stream processing framework.… Read More

BigData

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Computer Subject

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Hadoop

Stochastic Games in Artificial Intelligence

Many unforeseeable external occurrences can place us in unforeseen circumstances in real life. Many games, such as dice tossing, have a random element to reflect… Read More

AI-ML-DS

Artificial Intelligence

Optimal Decision Making in Games

Humans’ intellectual capacities have been engaged by games for as long as civilization has existed, sometimes to an alarming degree. Games are an intriguing subject… Read More

Artificial Intelligence

Machine Learning

Hibernate – Table Per Subclass Example using XML File

In Table Per Subclass, subclass tables are mapped to the Parent class table by primary key and foreign key relationship. In a Table per Subclass… Read More

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Java-Hibernate

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Java

Role of Civil Services in a Democracy

India is the largest democracy and the Indian people are its ultimate source of power. All the countries need some kind of administrative machinery for… Read More

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Political Science

UPSC

Check if a Binary tree is Subtree of another Binary tree | Set 3

Given two binary trees, check if the first tree is a subtree of the second one. A subtree of a tree T is a tree… Read More

Binary Tree

DSA

Tree

Count of Possible paths of given Matrix having Bitwise XOR equal to K

Given an N*M (N + M ≤ 40)matrix mat[][], each cell has some value ranging from 0 to 1018 and an integer K. Find the… Read More

meet-in-the-middle

Backtracking

DSA

Matrix

Design a concurrent server for handling multiple clients using fork()

Prerequisite: Socket Programming in C/C++, fork() System call Problem Statement: In this article, we are going to write a program that illustrates the Client-Server Model… Read More

C Programs

Computer Networks

Operating Systems

Barclays Interview Experience (On-Campus) 2021

Round 1:(Online coding round) Platform: HackerEarth Given an array of integers that represent a directed edge between the i-th index to array[i], should return the… Read More

Experiences

Interview Experiences

NewZera Interview Experience ( 1.5 Year Experienced)

Cognitive Assessment -1: 1hr 6 coding questions- medium to tough. I was able to solve 4 of them. Cognitive Assessment -2: 1hr 5 coding questions… Read More

Newzera

Experienced

Experiences

Interview Experiences

Spring – MVC Form Drop-Down List

In this article, we will learn about the Spring MVC Dropdown list. We will create a basic Spring MVC project in Spring tool suite(STS) to… Read More

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Java-Spring

Java-Spring-MVC

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Java

Servlet – Single Thread Model Interface

Single Thread Model Interface was designed to guarantee that only one thread is executed at a time in a given servlet instance service method. It… Read More

java-servlet

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Java

Lexicographically largest string formed by choosing words from given Sentence as per given Pattern

Given a sentence S and a string B having distinct characters, find a string by joining the words of S according to given conditions:- Choose… Read More

cpp-map

lexicographic-ordering

DSA

Pattern Searching

Strings

Foundation CSS Tooltip

Foundation CSS is an open-source & responsive front-end framework built by ZURB foundation in September 2011, that makes it easy to design beautiful responsive websites,… Read More

Foundation

Foundation-Media

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CSS

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Web Technologies

How to display values from database in real time without refreshing the webpage ?

Display values from database in real time without refreshing the webpage simply refers to auto fetch and re-rendering the data if there is any change… Read More

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React-Questions

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ReactJS

Web Technologies

How to Calculate Retention Rate in SQL?

The retention rate is calculated by counting the number of users who return on a regular basis, such as every week or month, and grouping… Read More

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SQL

Tetrahedral and Octahedral Voids

The space lattices and close atom packing of crystalline solids distinguish them. However, these structures contain voids, which are gaps in their arrangement. Many researchers… Read More

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Class 12

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School Chemistry

School Learning

Understanding Reinforcement Learning in-depth

The subject of reinforcement learning has absolutely grown in recent years ever since the astonishing results with old Atari games deep Minds victory with AlphaGo… Read More

Artificial Intelligence

Machine Learning