Java is a popular programming language known for its platform independence and object-oriented features.
Who developed Java?
Java was developed by James Gosling at Sun Microsystems, which is now owned by Oracle.
What is the Java Virtual Machine (JVM)?
The JVM is a part of the Java Runtime Environment that executes Java bytecode, allowing Java programs to be platform-independent.
What does 'platform-independent' mean in Java?
Platform independence means that Java programs can run on any device that has a JVM, making them highly portable.
What is bytecode in Java?
Bytecode is the intermediate representation of a Java program, which the JVM interprets or compiles.
What is an object in Java?
In Java, an object is an instance of a class that contains both data and methods to manipulate the data.
What are Java classes?
Classes in Java are blueprints for creating objects, defining their data structure and behaviors.
What does OOP stand for and how is it related to Java?
OOP stands for Object-Oriented Programming, and Java is an object-oriented language, which means it allows for designing programs using objects and classes.
What is a Java method?
A Java method is a set of instructions defined in a class, which can be executed when called upon in a program.
What is inheritance in Java?
Inheritance is a feature of Java where a new class can inherit properties and behaviors of another class.
What is an interface in Java?
An interface in Java is an abstract type that specifies a set of methods that a class must implement.
How do you declare a variable in Java?
In Java, you declare a variable by specifying its type followed by the variable name, e.g., int number;
What is the main method in Java?
The main method is the entry point of any Java application, where the program execution begins. It is defined as public static void main(String[] args).
What is encapsulation in Java?
Encapsulation is the OOP principle where the implementation details of a class are hidden, and only necessary parts are exposed.
What is polymorphism in Java?
Polymorphism is the ability of different classes to respond to the same method call in different ways.