Java Quiz: Class, Object, and Final

What is a class in Java?

• A blueprint for creating objects

• A method for organizing code

• A keyword used for loops

• A type of data structure

How do you create an object in Java?

• makeObject(ClassName)

• createObject(Class)

• ClassName.create()

• new ClassName()

What is the output of this code?

• Null

• compiler error

• Hi!

• My Name is: null

What is the output of this code?

• Null

• compiler error

• a

• person

Explain the significance of the 'final' keyword in Java with an example.

• The 'final' keyword in Java is used to allow the variable to be changed multiple times

• The 'final' keyword in Java is used to restrict the user. The variable declared as final cannot be changed after it is initialized. It can be used with classes, methods, and variables.

• The 'final' keyword in Java is used to make a variable mutable

• The 'final' keyword in Java is used to indicate that a variable is not initialized

Differentiate between class attributes and methods in Java with examples.

• Class attributes are variables, while methods are functions.

• Class attributes are static, while methods are dynamic.

• Class attributes are constants, while methods are variables.

• Class attributes are public, while methods are private.

What is object instantiation in Java?

• Creating a new variable in Java

• Defining a new method within a class

• Creating an instance of a class using the 'new' keyword

• Importing a new package in Java

Provide an example of object instantiation in Java.

• createObject(ClassName)

• new ClassName()

• instantiateObject(ClassName)

• ClassName.createInstance()