From a use case to a system sequence diagram and system operations

Question 2

What is a black box?

Answer 2

It’s defined as the behaviour of the software.

Question 3

What is system behaviour?

Answer 3

It’s a description of what the system does(without an explanation of how it does it).

Question 4

What’s a sequence diagram?

Answer 4

It shows, for a particular scenario of a use case, the events that external actors generate, their order, and possible inter-system events.