Java Online Quiz


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Following quiz provides Multiple Choice Questions (MCQs) related to Core Java. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Answer : A

Explaination

A class is a blue print from which individual objects are created. A class can contain fields and methods to describe the behavior of an object.

Q 2 - Can we have multiple classes in same java file?

A - True

B - False

Answer : A

Explaination

True, a java file can contain one public class and many other non-public classes.

Q 3 - What is the default value of byte variable?

A - 0

B - 0.0

B - null

B - undefined

Answer : A

Explianation

Byte variable has default value of 0 if defined as an instance/static variable.

Answer : A

Explaination

Variables defined inside methods, constructors or blocks are called local variables. The variable will be declared and initialized within the method and it will be destroyed when the method has completed.

Answer : B

Explaination

A class consist of Local variable, instance variables and class variables.

Answer : B

Explaination

If a subclass provides a specific implementation of a method that is already provided by its parent class, it is known as Method Overriding.

Answer : A

Explaination

These are classes that allow primitive types to be accessed as objects. Example: Integer, Character, Double, Boolean etc.

Q 9 - Which arithmetic operations can result in the throwing of an ArithmeticException?

A - / , %

B - * , +

C - ! , -

D - >>, <<

Answer : A

Explaination

Integer / and % can result in the throwing of an ArithmeticException.

Q 10 - which operator is considered to be with highest precedence?

A - () , []

B - =

C - ?:

D - %

Answer : A

Explaination

Postfix operators i.e () [] . is at the highest precedence.

java_questions_answers.htm

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