Day 2 - Java Test (class, object, static)

What is the default value of an object reference in Java?

• 0
• null
• undefined
• empty

Which keyword is used to create an object in Java?

• create
• class
• new
• object

What does a constructor do in Java?

• Destroys an object
• Allocates memory
• Initializes an object
• Calls methods

Which keyword is used to define a class in Java?

• define
• struct
• class
• object

What is the return type of a constructor?

• void
• int
• class type
• None

Which method is called automatically when an object is created?

• init()
• constructor
• main()
• finalize()

How many constructors can a class have?

• Only one
• Two
• Unlimited
• None

Static methods belong to:

• Object
• Class
• Package
• Variable

Which of the following can access static variables?

• Instance methods only
• Static methods only
• Both static and instance methods
• Constructors only

Can we overload constructors in Java?

• Yes
• No
• Only with different return types
• Only one is allowed