250+ TOP MCQs on Object Oriented Software Design

Software Engineering Multiple Choice Questions on “Object Oriented Software Design”.

1. Choose the incorrect statement in terms of Objects.
a) Objects are abstractions of real-world
b) Objects can’t manage themselves
c) Objects encapsulate state and representation information
d) All of the mentioned

Answer: b
Clarification: Objects are independent.

2. What encapsulates both data and data manipulation functions ?
a) Object
b) Class
c) Super Class
d) Sub Class

Answer: a
Clarification: None.

3. Which of the following is a mechanism that allows several objects in an class hierarchy to have different methods with the same name?
a) Aggregation
b) Polymorphism
c) Inheritance
d) All of the mentioned

Answer: b
Clarification: In polymorphism instances of each subclass will be free to respond to messages by calling their own version of the method.

4. Inherited object classes are self-contained.
a) True
b) False

Answer: b
Clarification: Inherited object classes are not self-contained. They cannot be understood without reference to their super-classes.

5. Which of the following points related to Object-oriented development (OOD) is true?
a) OOA is concerned with developing an object model of the application domain
b) OOD is concerned with developing an object-oriented system model to implement requirements
c) All of the mentioned
d) None of the mentioned

Answer: c
Clarification: The answer is in support with the OOD.

6. How is generalization implemented in Object Oriented programming languages?
a) Inheritance
b) Polymorphism
c) Encapsulation
d) Abstract Classes

Answer: a
Clarification: None.

7. Which of the following is a disadvantage of OOD ?
a) Easier maintenance
b) Objects may be understood as stand-alone entities
c) Objects are potentially reusable components
d) None of the mentioned

Answer: d
Clarification: All the options define the characteristics of OOD.

8. Which of the following describes”Is-a-Relationship” ?
a) Aggregation
b) Inheritance
c) Dependency
d) All of the mentioned

Answer: b
Clarification: None.

9. Object that collects data on request rather than autonomously is known as
a) Active Object
b) Passive Object
c) Multiple instance
d) None of the mentioned

Answer: b
Clarification: A passive object holds data, but does not initiate control.

10. Objects are executed
a) sequentially
b) in Parallel
c) sequentially & Parallel
d) none of the mentioned

Answer: c
Clarification: Objects may be distributed and may execute sequentially or in parallel.