Java Flashback Session :

Know more on Strings in Java : 
http://algovalley.com/java/java-string-stringI

Linux - YUM command...

Know more : http://algovalley.com/linux/red-hat-package-manager

Data Types in PHP :

Know more : http://algovalley.com/php/data-types-available-in-php

Java Flashback Session :

Know more on methods in Java : 

http://algovalley.com/java/methods-in-java-methodsI

Just Google AlgoValley to enrich your programming skills.

Java Flashback Session :

Know more on Structure of Java Program : 

http://algovalley.com/java/structure-of-java-program

Just Google #AlgoValley to enrich your programming skills.

PHP-Include & Require :

Know more : http://algovalley.com/php/php-include-and-require

The Domain Name System(DNS)

It is a hierarchical naming system where each level of name is separated by a dot(.)

It resolves user friendly domain names into computer friendly IP addresses. It also resolves IP addresses into domain names.

It provides a centralized database for resolution.

To know more : http://algovalley.com/linux/domain-name-system