File Info
| Exam | Java SE 8 Programmer II |
| Number | 1z0-809 |
| File Name | Oracle.1z0-809.BrainDumps.2019-08-12.96q.tqb |
| Size | 4 MB |
| Posted | Aug 12, 2019 |
| Download | Oracle.1z0-809.BrainDumps.2019-08-12.96q.tqb |
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Demo Questions
Question 1
Given:
class Sum extends RecursiveAction { //line n1
static final int THRESHOLD_SIZE = 3;
int stIndex, lstIndex;
int [ ] data;
public Sum (int [ ]data, int start, int end) {
this.data = data;
this stIndex = start;
this. lstIndex = end;
}
protected void compute ( ) {
int sum = 0;
if (lstIndex – stIndex <= THRESHOLD_SIZE) {
for (int i = stIndex; i < lstIndex; i++) {
sum += data [i];
}
System.out.println(sum);
} else {
new Sum (data, stIndex + THRESHOLD_SIZE, lstIndex).fork( );
new Sum (data, stIndex,
Math.min (lstIndex, stIndex + THRESHOLD_SIZE)
).compute ();
}
}
}
and the code fragment:
ForkJoinPool fjPool = new ForkJoinPool ( );
int data [ ] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
fjPool.invoke (new Sum (data, 0, data.length));
and given that the sum of all integers from 1 to 10 is 55.
Which statement is true?
- The program prints several values that total 55.
- The program prints 55.
- A compilation error occurs at line n1.
- The program prints several values whose sum exceeds 55.
Correct answer: C
Question 2
Given the content of Operator.java, EngineOperator.java, and Engine.java files:
and the code fragment:
What is the result?
- The Engine.java file fails to compile.
- The EngineOperator.java file fails to compile.
- The Operator.java file fails to compile.
- ON OFF
Correct answer: A
Explanation:
Question 3
Given the code fragment:
Stream<List<String>> iStr= Stream.of (
Arrays.asList (“1”, “John”),
Arrays.asList (“2”, null)0;
Stream<<String> nInSt = iStr.flatMapToInt ((x) -> x.stream ());
nInSt.forEach (System.out :: print);
What is the result?
- 1John2null
- 12
- A NullPointerException is thrown at run time.
- A compilation error occurs.
Correct answer: D
