Java Program for Number Mirror - CodeChef

Java Program for Number Mirror - CodeChef

Java Program for Add Two Numbers - CodeChef

Java Program for Add Two Numbers - CodeChef

Top 5 Rust Books 2025

Top 5 Rust Books 2025

Top 5 Python Books 2025

Top 5 Python Books 2024

Top 10 JavaScript Books 2025

Top 10 JavaScript Books 2024

Educative.io Review, Is It Worth Buying? Full Review in 2025

Educative.io Review, Is It Worth Buying? Full Review in 2025

Top 10 Websites to Practice Coding Challenges in 2025

Below are the most popular coding challenge websites with a short description of what each of them offers. Improve your coding skills by solving coding challenges.

Java Program for Sum the digits - CodeChef

Sum of Digits problem from CodeChef.

Subsets Of a Given Array, a Google Interview Question

In this coding problem, we need to find the power-set of given input without duplicates. Overview In this article, we discuss the subsets of a given input. This is one of the most popular questions asked in coding interviews. Companies that have asked this in their coding interview are Apple,

Method References And Types Available In Java

We see method references and different kinds of method references available in Java with examples. Method References Method reference operator :: is used to refer to the methods of functional interface. It is a compact and easy form of the lambda expression. Lambda expressions are used to create anonymous methods. Most

Subsets / Power-set Problem

In the Subsets problem, we find the power set of a given input using bitwise operations. In general, if we have n elements then the subsets are 2^​n​​ subsets.

Monotonic Array Problem

For the monotonic increasing array, we need to check if the previous index is less than the current index. And for the monotonic decreasing array, we need to check if the previous index is greater than the current index.