OOP with Java

What is the use of final keyword in Java?

• When a class is made final, a subclass of it can not be created.

• When a method is final, it can not be overridden.

• When a variable is final, it can be assigned value only once.

• All of the above

Size of int in Java is

• 8 bits

• 16 bits

• 32 bits

• 48 bits

When is the object created with new keyword?

• At compile time

• At run time

• Depends on the code

• At execution time

Identify the corrected definition of a package.

• A package is a collection of editing tools

• A package is a collection of classes

• A package is a collection of classes and interfaces

• A package is a collection of interfaces

Java is a platform independent programming language

• True

• False

What is a correct difference between print() and println()?

• print() prints the output and move to new line, println() prints the output and stays on same line

• print() prints the output and stays on same line, println() prints the output and move to new line

• None of the given

• Both of the given

What is meaning * in import statement?

• To import selected classes from a package

• To import all classes from a package

• To import all classes from a package and multiply it

• None of the given

What is the problem with this code?

Line 1: String myName = "Luna";

Line 2: System.out.println ("My name is " + myname);

• Line 2: should be System.out.println ("My name is myName");

• Line 2: should be System.out.println ("My name is "+ myName);

• Line 2: should be System.out.display("My name is " + myname);

• There is no problem with the code

In which of the following is toString() method defined?

• java.lang.Object

• java.lang.String

• java.lang.util

• java.io

Which of these cannot be used for a variable name in java ?

• Identifier & keyword

• Identifier

• Keyword

• None of the mentioned