Design and Implementation MCQs Archives

11. You want to minimize development cost by reusing methods? Which design pattern would you choose ?

A. Adapter Pattern

B. Singleton Pattern

C. Delegation pattern

D. Immutable Pattern

✅ The correct answer is option C.
Explanation: The delegation pattern is a design pattern in OOP where an object, instead of performing one of its stated tasks, delegates that task to an associated helper object.

12. Which diagram indicates the behaviour of the system as a consequence of external events ?

A. data flow diagram

B. state transition diagram

C. control specification diagram

D. workflow diagram

✅ The correct answer is option B.
Explanation: The state transition diagram represents the various modes of behavior (called states) of the system and the manner in which transitions are made from state to state.

13. Which of the following are the valid relationships in Use Case Diagrams______________________?

A. Generalization

B. Include

C. Extend

D. All of the mentioned

✅ The correct answer is option D.
Explanation: Generalization, include, extend all of these are valid relationships in use case diagrams.

14. Which diagram in UML emphasizes the time-ordering of messages ?

A. Activity

B. Sequence

C. Collaboration

D. Class

✅ The correct answer is option B.
Explanation: This diagram is a model describing how groups of objects collaborate in some behavior over time.

15. The recurring aspects of designs are called design____________________?

A. patterns

B. documents

C. structures

D. methods

✅ The correct answer is option A.
Explanation: A pattern is the outline of a reusable solution to a general problem encountered in a particular context.

16. What is a collection of operations that specify a service of a class or component ?

A. Use Case

B. Actor

C. Interface

D. Relationship

✅ The correct answer is option C.

17. If you are working on real-time process control applications or systems that involve concurrent processing, you would use a___________________?

A. Activity diagram

B. Sequence diagram

C. Statechart diagram

D. Object diagram

✅ The correct answer is option C.
Explanation: A statechart diagram shows a state machine, consisting of states, transitions, events, and activities.

18. A _______________ executes the loop task first, then tests a condition and repeats the task until the condition fails ?

A. repeat until

B. condition

C. do while tests

D. if then-else

✅ The correct answer is option A.

19. What incorporates data, architectural, interface, and procedural representations of the software ?

A. design model

B. user’s model

C. mental image

D. system image

✅ The correct answer is option A.
Explanation: The requirements specification may establish certain constraints that help to define the user of the system, but the interface design is often only incidental to the design model.

20. Which of the following is golden rule for interface design ?

A. Place the user in control

B. Reduce the user’s memory load

C. Make the interface consistent

D. All of the mentioned

✅ The correct answer is option D.
Explanation: These golden rules actually form the basis for a set of user interface design principles that guide this important software design activity.