All Hard Articles

Program to find Nth term divisible by a or b

Given two integers and . The task is to find the Nth term which is divisible by either of or . Examples : Input : a = 2, b… Read More

Binary Search

divisibility

GCD-LCM

DSA

Searching

Count all palindrome which is square of a palindrome

Given two positive integers L and R (represented as strings) where . The task is to find the total number of super-palindromes in the inclusive range… Read More

number-digits

palindrome

DSA

Mathematical

Strings

Find the Nth term of the series 2 + 6 + 13 + 23 + . . .

Given an integer N. The task is to write a program to find the Nth term of the given series: 2 + 6 + 13… Read More

GetNth

series

DSA

Mathematical

MAQ Software (On campus for full time software engineer)

MAQ Software visited our campus on 11th sept 18′ for the post of software engineer full time. Round 1: (Online test) First was 30 min… Read More

Experiences

Interview Experiences

Check if all the palindromic sub-strings are of odd length

Given a string ‘s’ check if all of its palindromic sub-strings are of odd length or not. If yes then print “YES” or “NO” otherwise.… Read More

palindrome

substring

Technical Scripter 2018

DSA

Strings

Edge Coloring of a Graph

In graph theory, edge coloring of a graph is an assignment of “colors” to the edges of the graph so that no two adjacent edges… Read More

Algorithms-Graph Traversals

BFS

Graph Coloring

Algorithms

DSA

Graph

Fibonacci Heap – Deletion, Extract min and Decrease key

In the last post, we discussed the Insertion and Union of Fibonacci Heaps. In this post, we will discuss Extract_min(), Decrease_key() and Deletion() operations on… Read More

Technical Scripter 2018

Data Structures

DSA

Heap

Technical Scripter

Arrange a binary string to get maximum value within a range of indices

Given a string consisting of only 0’s and 1’s. Now you are given N non-intersecting ranges L, R ( L <= R), more specifically [L1,… Read More

array-rearrange

binary-string

lexicographic-ordering

Competitive Programming

DSA

Strings

Count triplets in a sorted doubly linked list whose product is equal to a given value x

Given a sorted doubly linked list of distinct nodes(no two nodes have the same data) and a value x. The task is to count the… Read More

doubly linked list

Technical Scripter 2018

two-pointer-algorithm

Data Structures

DSA

Hash

Linked List

Sorting

Technical Scripter

Printing all subsets of {1,2,3,…n} without using array or loop

Given a natural number n, print all the subsets of the set without using any array or loop (only the use of recursion is allowed).Examples: Input… Read More

Picked

programming-puzzle

subset

Technical Scripter 2018

Bit Magic

DSA

Recursion

Technical Scripter

Check if at least half array is reducible to zero by performing some operations

Given an array of n-positive elements. In each operation, you can select some elements and decrease them by 1 and increase remaining elements by m.… Read More

Constructive Algorithms

frequency-counting

Arrays

DSA

Hash

Mathematical

Longest subarray with only one value greater than k

Given an array of N numbers, find length of the longest subarray such that K is the second largest element on insertion. Examples: Input: a[]… Read More

cpp-set

cpp-unordered_set

Self-Balancing-BST

Competitive Programming

DSA

Hash

Error handling in PHP

Prerequisite: Types of Error PHP is used for web development. Error handling in PHP is almost similar to error handling in all programming languages. The default… Read More

PHP-basics

PHP

PHP Programs

Web Technologies

HashMap computeIfAbsent() method in Java with Examples

The computeIfAbsent(Key, Function) method of HashMap class is used to compute the value for a given key using the given mapping function. Store the computed… Read More

Java - util package

java-basics

Java-Collections

Java-Functions

Java-HashMap

Java

Linux Networking Tools

One can use a variety of network tools to perform tasks such as obtaining information about other systems on your network, accessing other systems, and… Read More

linux-command

Technical Scripter 2018

Linux-Unix

Technical Scripter

Find pairs with given product in a sorted Doubly Linked List

Given a sorted doubly linked list of positive distinct elements, the task is to find pairs in the doubly linked list whose product is equal… Read More

doubly linked list

Technical Scripter 2018

DSA

Linked List

Technical Scripter

How to read if a checkbox is checked in PHP?

Using isset() Function The isset() function is an inbuilt function in PHP which checks whether a variable is set and is not NULL. This function… Read More

Picked

Technical Scripter 2018

PHP

PHP Programs

Technical Scripter

Web Technologies

C# | Sort the elements in the ArrayList

ArrayList.Sort Method is used to sorts the elements in the ArrayList. There are total 3 methods in the overload list of this method as follows:… Read More

CSharp-Collections-ArrayList

CSharp-Collections-Namespace

CSharp-method

C#

Maximize the number of subarrays with XOR as zero

Given an array of N numbers. The task is to maximize the number of subarrays with XOR value zero by swapping the bits of an… Read More

Bitwise-XOR

subarray

Arrays

Competitive Programming

DSA

Oyo Interview Experience

Test: 15-20 MCQs (OOPs, OS, DBMS, Time complexity, classes) Write a program to check whether given string of parenthesis is balanced or not. INPUT: 2… Read More

Experiences

Interview Experiences