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In this tutorial, we’ll learn how to calculate time complexity of a function execution with examples.

This System Design Cheat Sheet gives you a quick idea to tackle with the building blocks of any system design interview questions. Keep following this post for regular updates.

Comprehensive List of Java Multithreading (Concurrency) Interview Questions based on my personal interview experience over the last few years. Keep following this post link for regular updates.

This problem is frequently asked in the interview to check your understanding on threads and your programming skills. Problem statement might change for e.g.

• Print ping pong using two threads.
• Print alternate number using two threads.
• Print even numbers by one thread and odd numbers by another thread.

In this tutorial, we’ll learn different ways of adding new elements at the beginning of an Array in JavaScript.

In this tutorial, we’ll learn different ways to initialize List, ArrayList and LinkedList with values in single line in Java.

Problem: Given a Roman numeral, convert it to an Integer.

Problem: Given an Integer input, convert it to a Roman numeral. Input is within the range from 1 to 3999.

In this quick tutorial, we’ll learn how to combine two or more JSON object into one object in JavaScript.