Month: December 2020

Constructors are special kinds of methods which have the following properties: Constructors don’t have a return type Constructors have the same name as the class Constructors are used to initialize…

Inheritance is a fantastic feature which simplifies development and facilitates reuse of classes. A class can inherit properties and methods from another class. The inheriting class is called the subclass…

Java arrays allow use to store multiple values of the same type. Array elements are accessible by their indices. 0 is the first index. arrayname.length gives the length of the…

Amazon allows AWS users with multiple accounts to consolidate their bills into one bill. Following are reasons for doing so: easier to track charges across multiple accounts by combining usage,…

Amazon S3 is an object store and a durable storage system but it is not a global filesystem for the following reasons: S3 stores objects, not files S3 is a…

You can assign cost allocation tags to AWS resources. Each tag has a unique key and a value. Cost allocation tags can be used to track costs at a detailed…

Recursion is when a function calls itself repeatedly. The classical example of recursion the factorial function. To create a recursive definition of this function, we need to define a recursive…

Extensible Markup Language (XML) is a markup language which allows users to structure, describe, and interchange data on the Internet in clearly defined way. Markup can be used to give…

Java is one of the most popular and widely used programming languages in the world. Lets begin with a simple program before getting into any details: Open your IDE or…

phpDocumentor is a tool which creates complete documentation like Javadocs for PHP code. Installing phpDocumentor Install libraries. Restart Apache. Install PEAR. PEAR is a repository of php extensions: Tell PEAR…