OOP_1

What will str1==str2 return if both refer to the same string literal?

• true

• false

• compilation error

• 0

What is the purpose of a constructor?

• To destroy objects

• to call methods

• to initialise object

• to inherit classes

Which of these is an incorrect array declaration?

• int arr[] = new int[5]

• int [] arr = new int[5]

• int arr[] = new int[5]

• int arr[] = int [5] new

Which access modifier makes a member accessible within the same package?

• public

• private

• protected

• default(no modifier)

What does the static keyword mean in a method declaration?

• The method belongs to an object

• The method can only be called once

• The method belongs to the class, not instances

• The method cannot be accessed

What is constructor overloading?

• Having multiple constructors with different names

• Having multiple constructors with different return types

• Having multiple constructors with different parameters

• Having a constructor inside a method

Which of these method of String class can be used to test to strings for equality?

• isequal()

• isequals()

• equal()

• equals()

What will be the output of the following Java program?

• 9

• 10

• 11

• 12

• false false

• true true

• true false

• false true

How many constructors can a class have in Java?

• only one

• two

• As many as needed (overloaded)

• none