Explore topic-wise MCQs in Object Oriented Programming.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Object Oriented Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

Which specifier allows to secure the public members of base class in inherited classes?

A. Private
B. Protected
C. Public
D. Private and Protected
Answer» E.
Discussion
2.

In multi-level inheritance(all public), the public members of parent/superclass will ________

A. Will continue to get inherited subsequently
B. Will not be inherited after one subclass inheritance
C. , the public members of parent/superclass will ________a) Will continue to get inherited subsequentlyb) Will not be inherited after one subclass inheritancec) Will not be available to be called outside class
D. Will not be able to allocated with any memory space
Answer» B. Will not be inherited after one subclass inheritance
Discussion
3.

If a class doesn’t have public members, then________

A. None of its members will be able to get inherited
B. None of its instance creation will be allowed
C. None of its member function can be called outside the class
D. None of its data members will be able to get initial value
Answer» D. None of its data members will be able to get initial value
Discussion
4.

Which among the following is true for public class?

A. There can be more than one public class in a single program
B. Public class members can be used without using instance of class
C. Public class is available only within the package
D. Public classes can be accessed from any other class using instance
Answer» E.
Discussion
5.

Which specifier can be used to inherit protected members as protected in subclass but public as public in subclass?

A. Private
B. Default
C. Public
D. Protected
Answer» D. Protected
Discussion
6.

A class has its default constructor defined as public. Class B inherits class A privately. The class ___________

A. B will not be able to have instances
B. Only A can have instances
C. Only B can have instances
D. Both classes can have instances
Answer» E.
Discussion
7.

Which among the following for public specifier is false?

A. The static members can’t be public
B. The public members are available in other packages too
C. The subclasses can inherit the public members privately
D. There can be only one public class in java program
Answer» B. The public members are available in other packages too
Discussion
8.

How many public class(s) (outermost) can be there in a java program?

A. 1
B. 2
C. 3
D. As required
Answer» B. 2
Discussion
9.

If members of a super class are public, then________

A. All those will be available in subclasses
B. None of those will be available in subclasses
C. Only data members will be available in subclass
D. Only member functions will be available in subclass
Answer» B. None of those will be available in subclasses
Discussion
10.

We can reduce the visibility of inherited methods.

A. True
B. False
Answer» C.
Discussion
11.

Which among the following can be used for outermost class access specifier in java?

A. Private
B. Public
C. Default
D. Default or Public
Answer» E.
Discussion
12.

Which among the following have least security according to the access permissions allowed?

A. Private
B. Default
C. Protected
D. Public
Answer» E.
Discussion
13.

If the members have to be accessed from anywhere in the program and other packages also, which access specifier should be used?

A. Public
B. Private
C. Protected
D. Default
Answer» B. Private
Discussion
14.

Which among the following for public specifier is false?$

A. The static members can’t be public
B. The public members are available in other packages too
C. The subclasses can inherit the public members privately
D. There can be only one public class in java program
Answer» D. There can be only one public class in java program
Discussion
15.

If a class doesn’t have public members, then________$

A. None of its members will be able to get inherited
B. None of its instance creation will be allowed
C. None of its member function can be called outside the class
D. None of its data members will be able to get initial value
Answer» E.
Discussion
16.

Only object of class A can access disp() function

A. Only object of class B can access disp() function
B. Both instances can access disp() function
C. Accessing disp() outside class is not possible
Answer» B. Both instances can access disp() function
Discussion