01 - Introducing Java

 1. Java runs on an estimated billion plus smartphones today because Google’s Android operating system uses Java APIs.



 2. Java was first released in the mid-1990s by _______________. It was designed to be easy to learn Java by programmers who already knew C and C++. (1 mark)

  Sun Microsystems.




 3. Who is credited with being the 'creator of Java'?

  James Gosling

  Guido Van Rossum

  Mark Zuckerberg

  Bill Gates

 4. Which of the following on the list is Java used for? (1 mark)
Mobile applications (specially Android apps)
Desktop applications
Web applications
Web servers and application servers
Database connection

  All of the items on the list are valid answers as Java is used for them all.

  Desktop Applications only

  Mobile applications and Games only

  Android Applications only

 5. During 2006 and 2007 Sun released Java as free and _____-source software, under the terms of the GNU General Public License (GPL). (1 mark)

 6. Which of the following statements is NOT true? (1 mark)
Java works on the windows platform only
It is one of the most popular programming languages in the world
It is easy to learn and simple to use
It is open-source and free
It is secure, fast and powerful
It has a huge community support (tens of millions of developers)

  No 4 - Java is not open source or free. It is proprietary software

  No 2 - Java is only used by older programmers and is no longer currnet

  No. 1 - Java actually works on multiple platforms incluing Windows, Mac, Linux etc

  All of the items on the list are true of Java

 7. To start to learn Java and write Java programs you need a way to _________ source code and turn it into an executable for the Java runtime. (1 mark)
The normal way to do this is to install the Java Development Kit.

 8. When we write Java code, that high level code is known as s_______ c________. (1 mark)

 9. The code we write (in Java) is _________ into byte code, which is .class. All operating systems (e.g windows, mac, linux) would all understand this code.





 10. The JDK stands for Java Development kit and JDK is a set of software that is used to_____ Java based applications.
Note: Downloading the Java SE Development kit will include the JRE and everything else should be done for you on download.





 11. JRE (Java Runtime Environment) is an implementation of Java Virtual machine (JVM) that actually _______Java programs. It is responsible for the execution and running on operating systems.





 12. Netbeans and Eclipse, as well as Android Studio are all examples of very popular IDEs for writing Java programmes. What is an IDE? (1 mark)

  integrated development environment

  international dongle entity

  included detonated environment

  internal deviant entity

 13. You write the actual code for your programmes in a text editor. (In NetBeans/Eclipse, there's a special area for you to write code.) The code is called _______ code, and is saved with the file extension .java (1 mark)





 14. Once the file is saved, a programme called Javac is then used to turn the source code into Java Byte Code. This is known as __________(1 mark)

 15. After Javac has finished compiling the Java Byte Code, it creates a new file with the extension .class. Once the class file has been created, it can be run on the Java Virtual Machine



 16. Java is a general-purpose programming language that is class-based, _____-oriented, and designed to have as few implementation dependencies as possible (1 mark)

 17. It is intended to let application developers "write once, run anywhere" (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for __________. (1 mark)
Note: Java applications are typically compiled to
 "bytecode" that can run on any Java virtual machine
 (JVM) regardless of the underlying computer architecture





 18. Interesting fact - True or false? "Java was originally designed for interactive television, but it was too advanced for the digital cable television industry at the time" (1 mark)



 19. Interesting fact - True or false? " The language was initially called Oak after an oak tree that stood outside Gosling's office. Later the project went by the name Green and was finally renamed Java, from Java coffee" (1 mark)



 20. If you do not have Java installed on your computer, you can download it for free from (1 mark)
You can also simply download Eclipse from here: