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Exam Code: 1Z0-809
Exam Title: Java SE 8 Programmer II
Vendor: Oracle
Exam Questions: 196
Last Updated: November 15th,2024

Question 1

Given:
interface Doable {
public void doSomething (String s);
}
Which two class definitions compile? (Choose two.)

A. public abstract class Task implements Doable { public void doSomethingElse(String s) { }}
B. public abstract class Work implements Doable { public abstract void doSomething(String s) { } public void doYourThing(Boolean b) { }}
C. public class Job implements Doable { public void doSomething(Integer i) { }}
D. public class Action implements Doable { public void doSomething(Integer i) { } public String doThis(Integer j) { }}
E. public class Do implements Doable { public void doSomething(Integer i) { } public void doSomething(String s) { } public void doThat (String s) { }}

Correct Answer:AE

Question 2

Given the code fragment:
Path file = Paths.get (“courses.txt”);
// line n1
Assume the courses.txt is accessible.
Which code fragment can be inserted at line n1 to enable the code to print the content of the courses.txt file?

A. List<String> fc = Files.list(file); fc.stream().forEach (s - > System.out.println(s));
B. Stream fc = Files.readAllLines (file); fc.forEach (s - > System.out.println(s));
C. List fc = readAllLines(file); fc.stream().forEach (s - > System.out.println(s));
D. Stream fc = Files.lines (file); fc.forEach (s - > System.out.println(s));

Correct Answer:D

Question 3

Given the code fragment:
String str = “Java is a programming language”; ToIntFunction indexVal = str: : indexOf; //line n1 int x = indexVal.applyAsInt(“Java”); //line n2
System.out.println(x); What is the result?

A. 1
B. A compilation error occurs at line n1.
C. A compilation error occurs at line n2.

Correct Answer:A

Question 4

Given:
1Z0-809 dumps exhibit
What is the result?

A. Hi Interface-2
B. A compilation error occurs.
C. Hi Interface-1
D. Hi MyClass

Correct Answer:D

Question 5

Given the code fragment:
List values = Arrays.asList (1, 2, 3); values.stream ()
.map(n -> n*2) //line n1
.p eek(System.out::print) //line n2
.count();
What is the result?

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

Correct Answer:A