Download Oracle.1z0-809.NewDumps.2021-06-06.207q.tqb
| Vendor: | Oracle |
| Exam Code: | 1z0-809 |
| Exam Name: | Java SE 8 Programmer II |
| Date: | Jun 06, 2021 |
| File Size: | 9 MB |
Demo Questions
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.
Correct answer: A
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));
Correct answer: B
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 result?
- 246
- The code produces no output.
- A compilation error occurs at line n1.
- A compilation error occurs at line n2.
Correct answer: A
