CSA - Final Review

What is a method?

• A type of constructor
• Just another name for a function in a class
• A type of variable
• An argument

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

What is a setter?

• It is used to find the value of a member variable
  
• It is used to initialise a member variable only
• It is a method used to set or change a member variable.
• It is used to change a method.

What name is given to any class from which another class is derived (i.e. it inherits its properties and methods)?

• Superclass
• Subclass
• Overclass
• Underclass

What keyword is used to allow one class to inherit from another?

• extend
• extends
• extension
• exterminate

What happens if you don't put a constructor in a class definition?

• The class creates its own with arguments for every variable.
• The class creates its own with arguments for every method.
• The class creates its own without any arguments
  
• You get an error message

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

Consider the below code and choose the correct output.

public class Main {

public int a;

public long b;

public void test(long b)

{

System.out.println("long b");

}

public void test(int a)

{

System.out.println("int a");

}

public static void main(String[] args) {

Main e=new Main();

e.test(9*1000000000);

}

}

• int a

• long b

• Error

• long a

Every class in Java is a subclass of class _____________.

• Object

• Inheritance

• ArrayList

• Exception

The ability to make changes in your implementation code without breaking the code of others who use your code is a key benefit of _______________.

• Polymorphism

• Encapsulation

• Inheritance

• Extensibility