All Hard Articles

cmd | Rem command

Rem (abbreviation of remark) is a command (internal) found inside the Windows Command Processor Command Prompt, that allows for inclusion of comments inside batch programs.… Read More

Operating Systems

Count ways to split N! into two distinct co-prime factors

Given an integer N, the task is to find the number of ways N! can be split into two distinct factors A and B such… Read More

Prime Number

prime-factor

sieve

Algorithms

Combinatorial

DSA

Greedy

Mathematical

Queries to search for an element in an array and modify the array based on given conditions

Given an array arr[] consisting of N integers and an integer X, the task is to print the array after performing X queries denoted by… Read More

array-rearrange

Reverse

subarray

Arrays

DSA

Searching

Siemens PLM Interview Experience (On-Campus)

Siemens PLM came to our college in the last week of September. Due to COVID-19, the whole interview process was completed virtually. We had a… Read More

Marketing

On-Campus

Siemens

Experiences

Interview Experiences

How to Create a Responsive Like Button in ReactJS?

React is a JavaScript library used to develop interactive user interfaces. We will be making a Like feature using React JS. Modules required: npm React Font Awesome… Read More

JavaScript

ReactJS

Web Technologies

C# – Infinite Loop

Infinite Loop is a loop that never terminates or ends and repeats indefinitely. Or in other words, an infinite loop is a loop in which… Read More

C#

CommVault Systems Interview Experience (On-Campus)

This was the first time CommVault Systems had come to our campus for recruitment. They were offering two profiles – Software Development Engineer in Test… Read More

CommVault

Marketing

On-Campus

Experiences

Interview Experiences

SQL Clusters

In this article, we are going to cover the SQL cluster and will also cover some advantages and disadvantages of SQL clusters. Let’s discuss one… Read More

DBMS

SQL

Lexicographically smallest permutation of size A having B integers exceeding all preceding integers

Given two positive integers, A and B, the task is to generate the lexicographically smallest permutation of all integers up to A in which exactly… Read More

array-rearrange

lexicographic-ordering

permutation

Arrays

DSA

Greedy

Mathematical

Misc

Set cover is NP Complete

Problem: Given a ground Set X, an integer k, and a collection of subsets Si of X, the problem is to identify if there exists… Read More

NP Complete

NPHard

Analysis of Algorithms

DSA

Regression with Categorical Variables in R Programming

Regression is a multi-step process for estimating the relationships between a dependent variable and one or more independent variables also known as predictors or covariates.… Read More

R regression

R Language

Python – Extract tuples having K digit elements

Given a list of tuples, extract all tuples having K digit elements. Input : test_list = [(54, 2), (34, 55), (222, 23), (12, 45), (78,… Read More

Python list-programs

Python tuple-programs

Python

Python Programs

Python – Adjacent elements in List

Given a List extract both next and previous element for each element. Input : test_list = [3, 7, 9, 3] Output : [(None, 7), (3, 9),… Read More

Python list-programs

Python

Python Programs

SAP Labs Interview Experience | On-Campus 2021

SAP Labs visited our campus for Full-Time Employment for the developer role . So here is my journey from a reader to an interview writer… Read More

Marketing

On-Campus

SAP Labs

Experiences

Interview Experiences

Placements

Print the middle nodes of each level of a Binary Tree

Given a Binary Tree, the task is to print the middle nodes of each level of a binary tree. Considering M to be the number… Read More

cpp-map

cpp-vector

DFS

Tree Traversals

DSA

Recursion

Searching

Tree

Maximize length of increasing subsequence possible by replacing array element by nearest primes

Given an array arr[], the task is to maximize the length of increasing subsequence by replacing elements to greater or smaller prime number to the… Read More

Binary Search

Google

Prime Number

Arrays

DSA

Mathematical

Understanding “Things” in Internet of Things

Nowadays, Internet of Things (IoT) has become one of the most powerful technologies of modern era having the internet as its backbone. Internet of Things… Read More

IoT

Computer Networks

Smallest submatrix with Kth maximum XOR

Given a matrix m[][] of dimensions N × M and an integer K, calculate XOR(i, j) which is equal to the Bitwise Xor of all… Read More

Bitwise-XOR

Google

interview-preparation

priority-queue

submatrix

Bit Magic

DSA

Dynamic Programming

Hash

Matrix

3-coloring is NP Complete

Prerequisite: NP-Completeness, Graph Coloring Graph K-coloring Problem: A K-coloring problem for undirected graphs is an assignment of colors to the nodes of the graph such… Read More

NP Complete

Analysis of Algorithms

DSA

Graph

Set partition is NP complete

Set partition problem: Set partition problem partitions an array of numbers into two subsets such that the sum of each of these two subsets is… Read More

NP Complete

Analysis of Algorithms

DSA

Graph