Java Quiz 2

Which of the following statements is a valid declaration of an object that belongs to “MyClass”?

• 
  MyClass obj = new MyClass();

• 
  MyClass obj = new MyClass;

• obj = new MyClass();

• 
  new MyClass obj;

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

The ____ method executes first in an application, regardless of where you physically place it within its class.

• execute()

• 
  main()

• start()

• 
  run()

To create an object in java we use the keyword new.

• 
  True

• 
  False

<class name><Object name>=new <class name>();

This is syntax of creating ______.

• class

• 
  object

• method

• 
  function

What does the final keyword do in front of a variable 'x' declaration do?

• 
  the "final" keyword means a man is taking his final, so do not disturb him.

• 
  the "final" keyword means there is only one attribute in the Main class.

• The "final" keyword before the declaration of the variable "x" indicates that it is a constant and cannot be modified after its initial assignment.

• 
  the "final" keyword before the declaration of the variable "x" indicates that there is only one method() in this class.

Which of the following line of codes calls an attribute x within a class, and prints its value?

• System.out.println(x());

• System.out.println(x);

• System.out.println(obj.x)

• System.out.println("x");

What modifier makes an attribute and methods cannot be overridden/modified?

• final

• static

• abstract

• super

What keyword you may use to inherit from another class?

• implements

• this

• extends

• extent

Which of these is correct way of inheriting class A by class B?

• 
  class B + class A {}

• class B inherits class A {}

• 
  class B extends A {}

• 
  class B extends class A {}