Which of these does not affect different types of software as a whole ?

A. Heterogeneity
B. Flexibility
C. Business and social change
D. Security
✅ The correct answer is option B.
Explanation: Option b & c are a part of Software Engineering as a subject,hence option a covers them both.

Which model shows the flow of object interactions?

A. Sequence model
B. Subsystem model
C. Dynamic model
D. Both Sequence and Dynamic model
✅ The correct answer is option A.
Answer: a

Explanation: Sequence model are represented using a UML sequence or a collaboration diagram and are dynamic models.