Java Basics

Question 1

What does platform independence mean?

Answer 1

It means that Java can be run on many types of computers.

Question 2

What is the JRE?

Answer 2

The Java Runtime Environment.

Question 3

What is the JVM?

Answer 3

The Java Virtual Machine, is an emulator a program that sets aside part of your hard drive to act like a computer (JVM) that can execute Java programs.

Question 4

Object Orientation

Answer 4

Java is inherently object-oriented, which means that Java programs are made up from programming elements called objects.

Question 5

What is a class?

Answer 5

A class is the program code you write to create objects.

Question 6

What is the Java API?

Answer 6

Java API short for application programming interface, is a library with 100’s of classes, and 1000’s of methods.

Question 7

What is an applet?

Answer 7

Applets are Java programs that run directly within a web browser.

Question 8

What is a servlet?

Answer 8

Servlets are web-based Java programs that run on an internet server computer rather than in an Internet user’s web browser.

Question 9

What is JDK?

Answer 9

Java Development Kit, it is the toolkit for developers that includes the Java compiler and the runtime environment.

Question 10

What is SDK?

Answer 10

Software Development Kit is what Sun called the JDK for versions 1.2, 1.3, and 1.4.

Question 11

What is Java SE?

Answer 11

Java Standard Edition, a term that describes the Java language and the basic set of API libraries that are used to creat Java programs that can run on Windows, Linux, and other platforms, such as Macintosh.

Question 12

What is J2SE?

Answer 12

Java 2 Standard Edition, an older term for the Java language, and basic libraries.

Question 13

What is Java EE?

Answer 13

Java Enterprise Edition, also known as J2EE, and expanded set of API libraries that provide special functions such as servlets.