How to Select NULL Values in MySql

How to select null values in MySql. Misunderstanding NULL is a common mistake beginners do while writing a MySql query. While writing a query in MySql most of them compare column name with NULL. In MySql NULL is nothing or in simple word it is an Unknown Value so if you use comparison operator for NULL values you’ll get an empty result.

In this tutorial, We are going to learn how to write a query to select NULL values in MySql.

Difference Between Double (==) and Triple (===) Equals in Javascript

What’s the difference between double and triple equals operators .  Javascript supports both supports strict equality (===) and type-converting equality (==).

In the beginning it’s seems confusing to me when i see comparison using triple equals. Later i know the reason why triple comparison is used.

In this post i am going to explain what’s the difference between double(==) and triple(===) equal operators.

Find Duplicate Elements in an Array – Java Program

Write a java program to find duplicate elements in an array. There are multiple ways through which we can find duplicate elements in an array. In this tutorial, I’ll discuss three ways to find duplicate elements in an array.
This question is also very important in terms of technical interviews.

C Program to Swap two Numbers without using third variable

Write a c program to swap two numbers without using third variable. Given two input numbers, We have to write a code to swap two numbers without using third variable. In my previous post, I have explained a c program to swap two numbers using third variable. This question is generally asked in an interview.

Programming questions on linked list

Swap two numbers using Bitwise XOR Operator