Top 10 Java interview questions
Here are answers to the top 10 Java interview questions: What is Java and why is it used?
Architecture diagram for 3 tier application
A 3-tier application architecture is a common design that separates an application into three logical layers: the presentation layer,
Java Package
A java package is a group of similar types of classes, interfaces and sub-packages. Package in java can be categorized in
Difference between abstract class and interface
Abstract class and interface both are used to achieve abstraction where we can declare the abstract methods. Abstract class
Interface in Java
An interface in java is a blueprint of a class. It has static constants and abstract methods. The interface in Java
Abstract class in Java
A class which is declared with the abstract keyword is known as an abstract class in Java. It can
Polymorphism in Java
Polymorphism in Java is a concept by which we can perform a single action in different ways. Polymorphism is derived from
Inheritance in Java
Inheritance in Java is a mechanism in which one object acquires all the properties and behaviors of a parent object.
this keyword in java
There can be a lot of usage of java this keyword. In java, this is a reference variable that refers to the
Java static keyword
The static keyword in Java is used for memory management mainly. We can apply java static keyword with variables, methods, blocks