Pick Oracle 1z0-809 Dumps PDF For Excellence Prepartion And Your Ace Your Exam In First Attempt

Question No :01

Which two reasons should you use interfaces instead of abstract classes? (Choose two.)

A. You expect that classes that implement your interfaces have many common methods or fields, or
require access modifiers other than public.
B. You expect that unrelated classes would implement your interfaces.
C. You want to share code among several closely related classes.
D. You want to declare non-static on non-final fields.
E. You want to take advantage of multiple inheritance of type.

Answer: B,E

Question No :02 

What is the result of running the code with the –ea option?

A. -10
B. 0
C. An AssertionError is thrown.
D. A compilation error occurs.

Answer: C

Question No :03


Which code fragment, when inserted at line n1, enables the Birdie class to compile?
A. static void fly (Consumer<Bird> bird) {bird :: fly ();}
B. static void fly (Consumer<? extends Bird> bird) {bird.accept( ) fly ();}
C. static void fly (Supplier<Bird> bird) {bird.get( ) fly ();}
D. static void fly (Supplier<? extends Bird> bird) {LOST

Answer: C

Question No :04


Which two modifications enable the code to compile? (Choose two.)
A. At line 1, remove abstract
B. At line 9, insert super ( );
C. At line 12, remove public
D. At line 17, insert super (x);
E. At line 17, insert super (); super.side = x;
F. At line 20, use public void area ( ) {

Answer: D,F

Question No :05


Which statement is true?

A. The program prints several values that total 55.
B. The program prints 55.
C. A compilation error occurs at line n1.
D. The program prints several values whose sum exceeds 55.

Answer: C