Java OCA OCP Practice Question 3261

Question

Consider the following program: 

class ClassA {}/*from w  w  w  .  ja  v a 2  s .c  om*/

interface InterfaceB {}

class ClassC {}

class Test extends ClassA implements InterfaceB {
     String msg;
     ClassC classC;
}

Which one of the following statements is true? 

a)Class Test is related with ClassA with a has-a relationship.
b)Class Test is related to ClassC with a composition relationship.
c)Class Test is related with String with an is-a relationship.
d)Class ClassA is related with  InterfaceB with an is-a relationship.



b)

Note

When a class inherits from another class, they share an is-a relationship.

On the other hand, if a class uses another class (by declaring an instance of another class), then the first class has a has-a relationship with the used class.




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