Explore topic-wise MCQs in Object Oriented Programming.

This section includes 24 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.

If multi-level inheritance is used, First class B inherits class A, then C inherits B and so on. Till how many classes can this go on?

A. Only till class C
B. Only till class J
C. Only till class Z
D. There is no limit
Answer» E.
Discussion
2.

How many classes can be inherited by a single class in java?

A. Only 1
B. Only 27
C. Only 255
D. Only 1024
Answer» B. Only 27
Discussion
3.

How many classes can be inherited by a single class in multiple inheritance (C++)?

A. Only 2
B. Only 27
C. Only 1024
D. Any number of classes can be inherited
Answer» E.
Discussion
4.

Which type of inheritance cannot involve private inheritance?

A. Single level
B. Multiple
C. Hybrid
D. All types can have private inheritance
Answer» E.
Discussion
5.

In hierarchical inheritance, all the classes involve some kind of inheritance.

A. True
B. False
Answer» C.
Discussion
6.

If class A has two nested classes B and C. Class D has one nested class E, and have inherited class A. If E inherits B and C, then ________________

A. It shows multiple inheritance
B. It shows hierarchical inheritance
C. It shows multiple inheritance
D. Multiple inheritance among nested classes, and single level for enclosing classes
Answer» E.
Discussion
7.

If 6 classes uses single level inheritance with pair classes (3 pairs), which inheritance will this be called?

A. Single
B. Multiple
C. Hierarchical
D. Multilevel
Answer» B. Multiple
Discussion
8.

Which type of inheritance results in the diamond problem?

A. Single level
B. Hybrid
C. Hierarchical
D. Multilevel
Answer» C. Hierarchical
Discussion
9.

How many types of inheritance can be used at a time in a single program?

A. Any two types
B. Any three types
C. Any 4 types
D. Any type, any number of times
Answer» E.
Discussion
10.

Which among the following best describes multiple inheritance?

A. Two classes being parent of any other classes
B. Three classes being parent of other classes
C. More than one class being parent of other child classes
D. More than one class being parent of single child
Answer» E.
Discussion
11.

How many types of inheritance are possible in C++?

A. 2
B. 3
C. 4
D. 5
Answer» E.
Discussion
12.

Which method in the code below is single level inherited?

A. Class A
B. Class B
C. Class C
D. None
Answer» C. Class C
Discussion
13.

Output of following program?

A. B salary is: 4000.0Bonus of B is: 10000
B. B salary is 10000Bonus of B is: 4000.0
C. Compile time error
D. Runtime error
Answer» B. B salary is 10000Bonus of B is: 4000.0
Discussion
14.

Which type of inheritance is illustrated by the following code?

A. Single level
B. Multilevel and single level
C. Hierarchical
D. Hierarchical and single level
Answer» D. Hierarchical and single level
Discussion
15.

Which among the following is correct for the following code?

A. Multi-level inheritance is used, with nested classes
B. Multiple inheritance is used, with nested classes
C. Single level inheritance is used, with enclosing classes
D. Single level inheritance is used, with both enclosing and nested classes
Answer» E.
Discussion
16.

Which class uses hierarchical inheritance in following code?

A. Class A,B,C
B. Class B,C,D
C. Class A,C,D
D. Class D,A,B
Answer» E.
Discussion
17.

Which among the following is correct for following code ?

A. Compile time error
B. Runtime error
C. Program runs and o/p is 0
D. Program runs and o/p is garbage value
Answer» B. Runtime error
Discussion
18.

Does following code show multiple inheritance?

A. Yes, class C and class D
B. Yes, All together it’s multilevel
C. No, 4 classes are used
D. No, multiple inheritance is used with class A, B and C
Answer» E.
Discussion
19.

Base class _______________

A. Can be made abstract
B. Can’t be made abstract
C. Must be abstract
D. If made abstract, compile time error
Answer» B. Can’t be made abstract
Discussion
20.

If object of lowest level class is created ( last derived class ), _________________ of its parent class constructors are called.

A. Few
B. All
C. Only parent and parent
D. Base and Derived
Answer» D. Base and Derived
Discussion
21.

Which among the following is true?

A. Java supports all types of inheritance
B. Java supports multiple inheritance
C. Java doesn’t support multiple inheritance
D. Java doesn’t support inheritance
Answer» D. Java doesn’t support inheritance
Discussion
22.

Which among the following is false?

A. If one class inherits the inherited class in single level inheritance, it is multi-level inheritance
B. Hybrid inheritance always contains multiple inheritance
C. Hierarchical inheritance involves inheriting same class into more than one classes
D. Hybrid inheritance can involve any types of inheritance together
Answer» C. Hierarchical inheritance involves inheriting same class into more than one classes
Discussion
23.

Which class constructor is called first when an object of derived class is created?

A. Base class constructor
B. Derived class constructor
C. Firstly created derived class constructor
D. Last created derived class constructor
Answer» B. Derived class constructor
Discussion
24.

Which among the following is false?$

A. If one class inherits the inherited class in single level inheritance, it is multi-level inheritance
B. Hybrid inheritance always contains multiple inheritance
C. Hierarchical inheritance involves inheriting same class into more than one classes
D. Hybrid inheritance can involve any types of inheritance together
Answer» C. Hierarchical inheritance involves inheriting same class into more than one classes
Discussion