Java MCQ's on Java

This test contains 10 questions based on Java. Each question answered correctly awards you 1 point and each incorrect answer has a penalty of -0.25 points, no points are deducted for unattempted answers.

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You Get +1 for each correct answer and -0.25 for each incorrect answer

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Weakest access specifier among the following is

public	private
default	protected

B

private has the weakest access among all. Private members of a class can be accessed only within the same class.

Which access specifier should be used with a class which should be available everywhere in the project.

public	private
default	protected

A

A class with a public access can be accessed from anywhere.

Which of the following access specifier cannot be used with a class.

default	private
protected	Both B and C

D

A class can only be public or default.

Can we write two public classes within the same class.

Yes

No

B

We can write only one public class in a file. If we try to write two public classes in same file then we will get a compilation error.

Which access specifier allows methods of a class in package A to be used by a class in package B.

public	protected
default	Both A and B

A

Any member of a public class that is public can be used by a class in another package. A protected member of a class can be used by a class in another package only if this class inherits the other class.

Which access specifier is used for hiding data of classes of a package from classes of another package.

protected	private
default	protected

C

default access specifier allows the data members of a class to be used within the package only.

Which access specifier should be used with a constructor so that this class cannot be inherited.

public	private
default	protected

B

If a class has a private constructor then this class cannot be inherited.

How many non public classes can be declared within the same file.

Only 1	1 or more
only 2	Any number of classes.

D

There can be any number of non public classes in the same file.

Which access specifier allows access to the class members that inherits this class.

public	private
default	protected

D

protected members of a class are availabel in the classes of the same package and classes of other packages that inherit this class.

Which access specifier are used for methods of an interface.

public	private
default	Any of the above

A

All the methods of an interface are by default public.

Finish Test