QUESTION: 1

Given the definition of the Vehicle class:

Class Vehhicle {
int distance; //line n1
Vehicle (int x) {
this distance = x;
}
public void increSpeed(int time) { //line n2
int timeTravel = time; //line n3
class Car {
int value = 0;
public void speed () {
value = distance /timeTravel;
System.out.println (“Velocity with new speed”+value+”kmph”);
}
}
new Car().speed();
}
}

and this code fragment:

Vehicle v = new Vehicle (100); v.increSpeed(60);

What is the result?

Velocity with new speed
A compilation error occurs at line n1.
A compilation error occurs at line n2.
A compilation error occurs at line n3.

Answer(s): A

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QUESTION: 2

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.output::print);

Which modification enables the code fragment to compile?

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

Answer(s): B

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QUESTION: 3

Given the code fragment:
List<Integer> values = Arrays.asList (1, 2, 3);
values.stream ()
.map(n -> n*2) //line n1
.peek(System.out::print) //line n2
.count();

What is the esult?

246
The code produces no output.
A compilation error occurs at line n1.
A compilation error occurs at line n2.

Answer(s): A

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QUESTION: 4

Given the code fragment:
public class Foo {
public static void main (String [ ] args) {
Map<Integer, String> unsortMap = new HashMap< > ( );
unsortMap.put (10, “z”);
unsortMap.put (5, “b”);
unsortMap.put (1, “d”);
unsortMap.put (7, “e”);
unsortMap.put (50, “j”);

Map<Integer, String> treeMap = new TreeMap <Integer, String> (new
Comparator<Integer> ( ) {
@Override public int compare (Integer o1, Integer o2) {return o2.compareTo
(o1); } } );

treeMap.putAll (unsortMap);

for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) {
System.out.print (entry.getValue () + “ “);
}
}
}

What is the result?

A compilation error occurs.
d b e z j
j z e b d
z b d e j

Answer(s): C

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Free Oracle 1Z0-809 Exam Braindumps (page: 2)

Pass your Java SE 8 Programmer II exam with these free Actual Questions and Answers

QUESTION: 1

QUESTION: 2

QUESTION: 3

QUESTION: 4

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