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Question about is-a and use of English language on the exam

Alexander Danilou
Greenhorn

Joined: May 08, 2009
Posts: 28
Anybody with English as a first language?
I'm going thru K&B 6 Master Exam part one questions and question 50 have following statement:
"is-a relationships always rely on inheritance" and indicate that true is correct answer for this statement
How can is-a ALWAYS rely on inheritance when my understanding that SOMETIMES it can rely on interface.
For example if class A implements interface B then we can say that "A is-a B"???
Devaka Cooray
ExamLab Creator
Saloon Keeper

Joined: Jul 29, 2008
Posts: 3266
    
  49

Alexander Danilou wrote:For example if class A implements interface B then we can say that "A is-a B"???


Yes, interface-implementer relationship is a type of inheritance.

Devaka.


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Alexander Danilou
Greenhorn

Joined: May 08, 2009
Posts: 28
Hi Devaka,
OK, so what would you be your answer to the question:
is-a relationships always rely on inheritance - true or false?
Thanks
Devaka Cooray
ExamLab Creator
Saloon Keeper

Joined: Jul 29, 2008
Posts: 3266
    
  49

Alexander Danilou wrote:is-a relationships always rely on inheritance - true or false?

It's true. The reason is what I described in my previous post.
 
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subject: Question about is-a and use of English language on the exam