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is-a relationship

 
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Which two demonstrate an �is a� relationship? (Choose Two)
A. public interface Person { }
public class Employee extends Person { }
B. public interface Shape { }
public class Employee extends Shape { }
C. public interface Color { }
public class Employee extends Color { }
D. public class Species { }
public class Animal (private Species species
E. interface Component { }
Class Container implements Component (
Private Component[ ] children;
)


please explain this...
 
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As per your option, only one is correct and that is E.

A B and C not correct because class can't extend an interface.

D out of reach... What that smiley is doing there?

E is an example of is-a because Container is a Component and has-a because Container has Component array.


Naseem
 
swapnil paranjape
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so implementing interface is is-a type of relation?

thank you very much
 
Naseem Khan
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YES
 
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option 'd' is HAS-A relationship.
only option 'e' is correct
 
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Wat are all come under is-a relationship....
(a) if an interface extends another interface....
(b) if a class extends another class...
(c) if a class implements an interface...
(d) if a class extend a class and implements another interface....
 
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