MongoDB is one of the popular NoSQL database, is an open-source document-oriented database. The term ‘NoSQL’ means ‘not only SQL or non-relational’. It provides an altogether different mechanism for storage and retrieval of data, uses BSON storage format (similar to JSON format) and it is not based on relational database structure. Advantages and Disadvantages of MongoDB: Advantages- Flexibilty-… Read More »
According to Brewer’s theorem (also called CAP theorem), any distributed data store (like a database) can only provide two of the following three guarantees: Consistency Availability Partition tolerance Now when it comes to pain tolerance, like a network partition failure, one of the following decisions need to be made: Cancel the operation => decrease the availability but ensure… Read More »
Given a binary matrix of order m*n, the task is to find the distance of nearest 1 for each 0 in the matrix and print final distance matrix. From any cell (i,j), we can move only in four directions up, down, left and right. Note: Distance from one cell to immediate another cell is always incremented by 1.… Read More »
Given a positive integer N, the task is to check whether the given number N is Even or Odd. Examples: Input : N = 10 Output : Even Input : N = 5 Output : Odd Method 1: An even number is an integer which is “evenly divisible” by 2. This means that if the integer is divided… Read More »
Given two numbers A and B, the task is to calculate GCD of A and B. Examples: Input : A = 4, B = 6 Output : 2 Input : A = 5, B = 10 Output : 5 GCD (Greatest Common Divisor) of two number is the largest number that divides both of them. A simple solution… Read More »
Given a number N, the task is to find Nth Fibonacci number. The Fibonacci numbers are the numbers in the following integer series. 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ……. In this series, each number is the sum of the two preceding ones starting from 0 and 1. Examples: Input :… Read More »
Count the number of even/odd results after performing a series of calculation on a range of numbers. Given that: Each layer of calculation have two numbers (say a and b) associated with it. For each input x, y = ax + b is calculated. The result of layer i, i.e y, becomes input for layer i+1. The range… Read More »
Write a program in C++ to depict the concept of overriding or Dynamic polymorphism. Overriding is a type of polymorphism. Polymorphism in OOP languages means to take more than one form. Virtual functions in C++ are functions that do not have an actual implementation, these are written in the base class to be overridden in derived class. When… Read More »
For the given hour and minute let say “hh” and “mm” print the next sooner palindromic time. Example: Input: hh = 02 mm = 03 Output: 02:20 Explaination:For the hour 02 and minute 03 the next sooner palindromic time is 02:20 Input hh = 04 mm = 45 Output: 05:50 Explaination:For the hour 04 and minute 45 the… Read More »
Given an array of integers. The task is to find the Minimum index of repeating element in an array in linear time and in a single traversal of the array. Examples: Input : {5, 6, 2, 1, 6, 1, 2} Output : Minimum index of repeating element is 1 Input : {1, 2, 5, 6, 7} Output :… Read More »
