Coding Interviews

Code Chef

Java Program for Number Mirror - CodeChef

Code Chef

Java Program for Add Two Numbers - CodeChef

Coding Interviews

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.

Coding Interviews

How to Prevent cannot read property split of undefined

Code Chef

Java Program for Sum the digits - CodeChef

Sum of Digits problem from CodeChef.

Coding Interviews

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,

Coding Interviews

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

Coding Interviews

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.

Coding Interviews

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.

Coding Interviews

How To Prevent cannot read property map of undefined

How To Prevent cannot read property map of undefine

Coding Interviews

Check Kth bit either '1' or '0'

React

How To Build a Simple React To-Do App with React Hooks

Building a React To-Do app with React Hooks is a great way to learn how to use React Hooks in your projects.