Java Fundamentals Final Quiz

What is bytecode in Java?

• A type of variable that takes 8 bits in memory

• A file extension for Java source code

• Intermediate code executed by the JVM

• A type of class in Java that contains a main() method

What was the main advantage of Java when it was released?

• Faster execution speed than other popular languages

• The ability to run the same program on all supported platforms

• It was the first true Object Oriented programming language

• Java Scripting allowed webpages to be more dynamic compared to static HTML

The extension of a Java bytecode file is ._____

A public method in Java should start with an uppercase (capital) letter

• True

• False

You have created a class Student. What is the code to create an object of this type with the variable name 'john'?

_____________________

Which of the following are valid data types in Java?

• int

• double

• string

• short

What is method overloading in Java?

• Defining multiple methods with the same name but different parameters

• Defining methods from a superclass inside a subclass

• Calling the same method multiple times

• Calling a method from itself to create a loop

Which collection class allows duplicate elements and maintains insertion order?

• List

• Set

• Map

• ArrayList

The ____ keyword in Java is used to refer to the current instance of the class.

What is the purpose of the FileChooser class in Java?

• To create graphical user interfaces by loading in FXML files

• To execute SQL queries on an SQLite database file

• To select files for saving and loading data

• To serialize objects to binary data files