UML diagram for an interface implementing another interface

[pohjie]

Hello, I was looking through the textbook and I noticed that when a class implements an interface, we will draw a dashed arrow from the class to the interface. When an interface implements another interface, we use a solid arrow instead. May I know the reasoning behind the distinction?

[damithc]

When an interface implements another interface we use a solid arrow instead

It should be 'When an interface implements inherits another interface...'

[yunpengn]

The textbook seems to be unclear about this point.
I think it should be changed to When a class implements an interface, it is shown as ...

[pohjie]

Hi Prof,

What about question A24 of mock paper part 1? BarA and BarB are not indicated as interfaces, yet the lines connecting these two bars to Bar is a solid line.

Thank you.

[damithc]

I think it should be changed to When a class implements an interface, it is shown as ...

Yes, that's a good idea.

[damithc]

What about question A24 of mock paper part 1? BarA and BarB are not indicated as interfaces, yet the lines connecting these two bars to Bar is a solid line.

That's an error in the question. It should be like this: