Java Unit2 MCQ Test

What is used to create an object in Java?

• new
• class
• method
• object

What is the default return type of a constructor?

• int
• void
• class type
• no return type

What keyword is used to refer to the current object in Java?

• super
• self
• this
• current

Which of these is not a type of method overloading?

• Same method name
• Different return type
• Different parameter type
• Same parameter order

Which of the following is a correct declaration of an integer array?

• int arr() = new int[5];
• int arr[] = new int[5];
• arr = int[5];
• array int arr[5];

What does a constructor do?

• Initializes object
• Deletes object
• Prints object
• Copies object

How can you differentiate constructors?

• Return type
• Parameter list
• Method name
• Access specifier

The keyword `this` can be used for?

• Refer current class variable
• Call another constructor
• Return current object
• All of the above

Where is a local variable declared?

• Inside a class
• Inside a method
• Outside all methods
• Inside constructor only

What is a global variable in Java?

• Declared inside method
• Declared inside constructor
• Declared inside class but outside methods
• Declared inside loop