Enthuware

Hello,

For this question, you have marked that line //3 is causing a compilation error as a correct answer. But I think it actually is line //4 with that correct explanation as well.

Line //3 is abstract class PowerTool implements Tool{ } //3

So a call implements an interface (Tool) .. This is correct

Line //4 is : class PowerSaw implements PowerTool{ //4

So class implements a class... this is not correct.

So in my opinion, line 4 not line 3 is causing a problem here.

Please let me know your opinions.

Thank you,
Laurentiu

You are right. The explanation is correct but belongs to line 4 instead of 3.

thank you for your feedback!

The first line of the explanation for why //4 would cause an error, while correct, doesn't seem to apply to the actual question:

A class cannot "extend" an interface. It can only "implement" it.

But that bit is about this line, which neither extends something nor mentions an interface:
It seems like it would be better to say (changes in bold)

A class cannot "implement" another class. It can only "extend" it.

You are right. Fixed.
thank you for your feedback!