1Z0-816 무료 덤프문제 온라인 액세스

Which two are functional interfaces? (Choose two.)

• A.Option B
• B.Option C
• C.Option D
• D.Option A
• E.Option E

Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?

• A.The compilation succeeds.
• B.The compilation fails because a final class cannot extend another class.
• C.The compilation fails because there is no zero args constructor defined in class X.
• D.The compilation fails because either class X or class Y needs to implement the toString() method.

Which code fragment compiles?

• A.Option B
• B.Option C
• C.Option D
• D.Option A

Given:

Which two are secure serialization of these objects? (Choose two.)

• A.Make the class abstract.
• B.Implement only writeReplace to replace the instance with a serial proxy and not readResolve.
• C.Declare fields transient.
• D.Define the serialPersistentFields array field.
• E.Implement only readResolve to replace the instance with a serial proxy and not writeReplace.

Which statement about a functional interface is true?

• A.It is declared with a single default method.
• B.It must be defined with the public access modifier.
• C.It is declared with a single abstract method.
• D.It must be annotated with @FunctionalInterface.
• E.It cannot have any private methods and static methods.