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We have an integer array that is sorted in ascending order. We also have 3 integers A, B and C. We need to apply A*x*x… Read More
Java Based: OOPs concepts ( mostly polymorphism and difference between encapsulation and abstraction) Difference between abstract class and interface. Difference between == and .equals() functions.… Read More
TimSort is a sorting algorithm based on Insertion Sort and Merge Sort. A stable sorting algorithm works in O(n Log n) time Used in Java’s… Read More
Prerequisites :- Nested Classes in Java Local Inner Classes are the inner classes that are defined inside a block. Generally, this block is a method… Read More
Prerequisites : Input/Output from external file in C/C++, Java and Python for Competitive Programming In above post,  we saw a way to have standard input/output… Read More
Given an array of n numbers. Our task is to find out the number of ways to divide the array into three contiguous parts such… Read More
Prerequisite: Singleton Pattern In this article, we will see that what are various concepts which can break singleton property of a class and how to… Read More
Only user-defined functions. No inbuilt functions at all. No scanning for inputs, directly assign to vars.  Level 1: (2 hours – pen & paper) 1.Solve the equation… Read More
Telephonic Round: Given a 2D matrix with elements 1 and 0, where 1 is land and 0 is water. Find the number of islands. Design… Read More
Given a sorted linked list, delete all nodes that have duplicate numbers (all occurrences), leaving only numbers that appear once in the original list. Examples: Input… Read More
Given a binary input that represents binary representation of positive number n, find binary representation of smallest number greater than n with same number of… Read More
Given a date and a positive integer x. The task is to find date after adding x days to the given date Examples: Attention reader! Don’t… Read More
In previous articles, we discussed about singleton design pattern and singleton class implementation in detail. In this article, we will see how we can create singleton… Read More
Given a Binary Tree, write a function that returns the size of the largest subtree which is also a Binary Search Tree (BST). If the… Read More
Given N modular equations: A ≅ x1mod(m1) . . A ≅ xnmod(mn) Find x in the equation A ≅ xmod(m1*m2*m3..*mn) where mi is prime, or… Read More
Many websites use small strings of text known as cookies to store persistent client-side state between connections. Cookies are passed from server to client and… Read More
Predict the output of the following C++ programs. Question 1Want to learn from the best curated videos and practice problems, check out the C++ Foundation… Read More
Given a integer ‘x’, find the number of values of ‘a’ satisfying the following conditions:  0 <= a <= x a XOR x = a… Read More
dup() The dup() system call creates a copy of a file descriptor. Take a step-up from those "Hello World" programs. Learn to implement data structures… Read More
We are living in a world where everything is happening at the speed of a Formula-1 car in a race track. Keeping tick of essentials… Read More