Object Oriented Programming/ Java Essentials Pre-Test

Polymorphism related to :

• PPO

• Class

• OPP

• OOP

Which from the following is a feature that allows us to perform a single action in different ways.

• Abstraction

• Polymorphism

• Encapsulation

• Inheritance

The process by which objects of one class acquire the properties of objects of another class is known as

• Polymorphism

• Inheritance

• Data Hiding

• Association

How many objects can be made from a class? 

• None, you make classes from objects
  
• one
• As many as you want
• All of the above

What is the difference between a class and an object?

• A class is a blueprint to make an object
• An object is a blueprint to make a class
• A blueprint is an object to make a class
• Blueprint class is an object make a

An object is an instance of a:

• parameter
• method
• class
• application

Which of the these is the functionality of ‘Encapsulation’?

• Binds together code and data

• Using single interface for general class of actions

• Reduce Complexity

• All of the mentioned

What is the main difference between float and double data types?

• 4.1 is an example of float.

• 4.11 is an example of double.

• Float consists of 8 bytes, and double consists of 4 bytes.

• Float consists of 4 bytes, and double consists of 8 bytes.

Which data type is used to create a variable that should store text?

• myString

• String

• Txt

• string

How do you insert COMMENTS in Java code?

• # This is a comment

• /* This is a comment

• // This is a comment