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Oracle 1z1-809 certification exam is designed for Java programmers who are seeking to enhance their skills and knowledge in Java SE 8 programming. Java SE 8 Programmer II certification exam is an advanced level exam that validates the candidate's abilities to create efficient and effective Java applications. 1z0-809 Exam Tests the candidate's understanding of Java concepts such as lambda expressions, functional interfaces, and streams.

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Oracle Java SE 8 Programmer II Sample Questions (Q149-Q154):

NEW QUESTION # 149
Given the code fragment:

What is the result?

A. Java EEJava EESE
B. Java SEJava EE
Java EEJava SE
C. The program prints either:
Java EEJava SE
D. Java EESE

Answer: B

NEW QUESTION # 150
Which two methods from the java.util.stream.Streaminterface perform a reduction operation? (Choose two.)

A. distinct ()
B. collect ()
C. peek ()
D. filter ()
E. count ()

Answer: B,E

Explanation:
Explanation/Reference: https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html

NEW QUESTION # 151
Given:
IntStream stream = IntStream.of (1,2,3);
IntFunction<Integer> inFu= x -> y -> x*y;//line n1
IntStream newStream = stream.map(inFu.apply(10));//line n2
newStream.forEach(System.out::print);
Which modification enables the code fragment to compile?

A. Replace line n1 with:IntFunction<UnaryOperator> inFu = x -> y -> x*y;
B. Replace line n2 with:IntStream newStream = stream.map(inFu.applyAsInt (10));
C. Replace line n1 with:IntFunction<IntUnaryOperator> inFu = x -> y -> x*y;
D. Replace line n1 with:BiFunction<IntUnaryOperator> inFu = x -> y -> x*y;

Answer: C

NEW QUESTION # 152
Given the code fragment:

What is the result?

A. Match 1
B. No Match
C. Match 2
D. A nullPointerException is thrown at runtime.

Answer: C

NEW QUESTION # 153
Given:
class Bird {
public void fly () { System.out.print("Can fly"); }
}
class Penguin extends Bird {
public void fly () { System.out.print("Cannot fly"); }
}
and the code fragment:
class Birdie {
public static void main (String [ ] args) {
fly( ( ) -> new Bird ( ));
fly (Penguin : : new);
}
/* line n1 */
}
Which code fragment, when inserted at line n1, enables the Birdie class to compile?

A. static void fly (Supplier<? extends Bird> bird) {
LOST
B. static void fly (Supplier<Bird> bird) {
bird.get( ) fly ();
}
C. static void fly (Consumer<Bird> bird) {
bird :: fly ();
}
D. static void fly (Consumer<? extends Bird> bird) {
bird.accept( ) fly ();
}

Answer: B

NEW QUESTION # 154
......

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