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Question ID 3462

Given these facts about Java types in an application:
- Type x is a template for other types in the application. - Type x implements dostuff ().
- Type x declares, but does NOT implement doit(). - Type y declares doOther() .
Which three are true?
 

Option A

A.    Type y must be an interface.
 

Option B

B.    Type x must be an abstract class.
 

Option C

C.    Type y must be an abstract class.
 

Option D

D.    Type x could implement or extend from Type y.
 

Option E

E.    Type x could be an abstract class or an interface.
 

Option F

F.    Type y could be an abstract class or an interface.
 

Correct Answer B,D,F
Explanation


Question ID 3463

Given:
 
What two changes, made independently, will enable the code to compile?

Option A

A.    Change the signature of Account to: public class Account.
 

Option B

B.    Change the signature of CheckingAccount to: public abstract CheckingAccount
 

Option C

C.    Implement private methods for deposit and withdraw in CheckingAccount.
 

Option D

D.    Implement public methods for deposit and withdraw in CheckingAccount.
 

Option E

E.    Change Signature of checkingAccount to: CheckingAccount implements Account.
 

Option F

F.    Make Account an interface.
 

Correct Answer B,D
Explanation

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