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Is-Like-A and Is-A

 
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If the real exam asks us to identify Is-A relation, do we also select Is-Like-A relation?
Is-A relation:
When "extends" is used,
such as class A extends class B, and interface A extends interface B.
Is-Like-A relation:
When "implements" is used,
such as class A implements interface B
Should we include Is-Like-A relation as Is-A relation?
 
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I think it's still a IS-A because the class *has* to implement all of the interface methods, so the class IS-A interface type as well.
David.
 
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