Java Quiz

Java Quiz

What is a reference data type?

A) Includes 8 basic data types

B) Refers to another data type

C) Data type based on a class
What is an enum?

A) Creates a newly defined a group of values that a variable can have.

B) Indicates a value is true or false

C) Represents Unicode characters
Which of the following is a valid declaration of an object of class Puppy?

A) Puppy obj = new Puppy();

B) new Puppy obj;

C) obj = new Puppy;
Which of these statement is incorrect?

A) There can be only one main() method in a program.

B) main() method must be made public.

C) Every class must contain a main() method.
What is the output of the program?

A) 26

B) 25

C) 1
Which of these coding types is used for data type characters in Java?

A) UNICODE

B) ASCII

C) ISO-LATIN-1
Which of the following stands true about default modifier of class members?

A) By default, variables, methods and constructors can be accessed by any class lying in any package.

B) By default, variables, methods and constructors can be accessed by any class lying in the same package.

C) By default, variables, methods and constructors can be accessed by subclass only.
Inheritance represents

A) HAS-A relationship

B) IS-A relationship
What kind of variables a class can consist of?

A) class variables, local variables

B) class variables

C) class variables, local variables, instance variables
This is the parent of Error and Exception classes.

A) Throwable

B) MainException

C) MainError