All Hard Articles

Maximum Occurrence in a Given Range

Given an array of n integers in non-decreasing order. Find the number of occurrences of the most frequent value within a given range. Examples: Input… Read More

array-range-queries

Segment-Tree

Advanced Data Structure

Arrays

DSA

Technical Scripter

ISRO | ISRO CS 2015 | Question 7

If half adders and full adders are implemented using gates, then for the addition of two 17 bit numbers (using minimum gates) the number of… Read More

ISRO

Finding a Non Transitive Co-prime Triplet in a Range

Given L and R, find a possible non-transitive triplet (a, b, c) such that pair (a, b) is co-prime and pair (b, c) is co-prime… Read More

GCD-LCM

number-theory

Prime Number

DSA

Mathematical

Technical Scripter

Maximum in a 2D matrix using Multi-threading in C++

Given a 2-D matrix, find the element having maximum value using multi-threading. Prerequisite : Multithreading Examples : Input : {{1, 5, 3, 6}, {22, 10,… Read More

cpp-multithreading

mutli-threading

C++

C++ Programs

Python Program for Legendre’s Conjecture

It says that there is always one prime number between any two consecutive natural number\’s(n = 1, 2, 3, 4, 5, …) square. This is… Read More

DSA

Python Programs

Microsoft interview experience: | Set 167 (7 Years Experienced)

Round 1: k frequently words in a given file of huge data. Find index of distortion in a sorted but a little bit distorted array.… Read More

Experiences

Interview Experiences

Fast inverse square root

Fast inverse square root is an algorithm that estimates , the reciprocal (or multiplicative inverse) of the square root of a 32-bit floating-point number x in… Read More

Bit Magic

C++ Programs

DSA

Mathematical

Number of subsets with product less than k

You are given an array of n-elements, you have to find the number of subsets whose product of elements is less than or equal to… Read More

cpp-vector

subset

Arrays

DSA

Technical Scripter

Walmart Labs Interview Experience | Set 17 (Experienced Java Development Stack)

I applied in Walmart Labs through employee referral, next day got call from HR and asked me to brief about my work and how much I am… Read More

Algorithms

DSA

Dynamic Programming

Experiences

Interview Experiences

Recursion

UGC-NET | UGC NET CS 2017 Jan – III | Question 42

What can you say about the following statements ? I. XML tags are case-insensitive. II. In JavaScript, identifier names are case-sensitive. III.Cascading Style Sheets (CSS)… Read More

UGC-NET

Sumo Logic Interview Experience for Internship

Sumo Logic visited our campus summer internship program. All candidates above 65% were allowed to sit for online round. Round 0: This one was a 1hr… Read More

Sumologic

Algorithms

DSA

Experiences

Internship

Interview Experiences

Microsoft Interview Experience | Set 166

Round 1: Reverse bits of integer and give the resulting number. a/b/../c/d/e/…/f => a/c/f => count of . == n => go back (n-1) time… Read More

Experiences

Interview Experiences

UGC-NET | UGC NET CS 2017 Jan – III | Question 6

In 8085, which of the following performs : load register pair immediate operation? (A) LDAX rp (B) LHLD addr (C) LXI rp, data (D) INX… Read More

UGC-NET

OYO Rooms Interview Experience | Set 9 (Software Developer)

Drive was conducted for software developer (6 months work ex) Round 1: two written questions – https://www.hackerrank.com/challenges/candies/problem – Check if a binary tree is subtree of… Read More

Experiences

Interview Experiences

Skew Heap

A skew heap (or self – adjusting heap) is a heap data structure implemented as a binary tree. Skew heaps are advantageous because of their… Read More

Advanced Data Structure

DSA

Heap

Misc

Pandigital Product

A Pandigital Number is a number that makes the use of all digits 1 to 9 exactly once. We are given a number, we need… Read More

Java-Strings

number-digits

DSA

Java

Mathematical

Sorting

Structure and Members of the Java Program

When we are writing any program in any language, we need to follow a standard structure for writing the program which is recommended by the… Read More

java-basics

Java

Java Program to Find sum of Series with n-th term as n^2 – (n-1)^2

We are given an integer n and n-th term in a series as expressed below: Tn = n2 - (n-1)2 We need to find Sn… Read More

Java Programs

Transform a string such that it has abcd..z as a subsequence

Given a string S of only small English letters. We need to transform the string by making some number of moves (any number of times)… Read More

subsequence

DSA

Strings

Technical Scripter

Maximum and Minimum Values of an Algebraic Expression

Given an algebraic expression of the form (x1 + x2 + x3 + . . . + xn) * (y1 + y2 + . .… Read More

DSA

Dynamic Programming

Mathematical

Matrix

Technical Scripter