1z0-809 Exam Dumps - Oracle Java SE Questions and Answers

Given:

public interface Moveable {

public default void walk (Integer distance) {System.out.println(“Walking”);)

public void run(Integer distance);

}

Which statement is true?

Given the code fragment:

List nL = Arrays.asList(“Jim”, “John”, “Jeff”);

Function funVal = s -> “Hello : “.concat(s);

nL.Stream()

.map(funVal)

.forEach(s-> System.out.print (s));

What is the result?

Given the code fragment:

What is the result?

Given the code fragment:

BiFunction val = (t1, t2) -> t1 + t2;//line n1

System.out.println(val.apply(10, 10.5));

What is the result?

Given:

From what threading problem does the program suffer?

Given the code fragment:

9. Connection conn = DriveManager.getConnection(dbURL, userName, passWord);

10. String query = “SELECT id FROM Employee”;

11. try (Statement stmt = conn.createStatement()) {

12. ResultSet rs = stmt.executeQuery(query);

13.stmt.executeQuery(“SELECT id FROM Customer”);

14. while (rs.next()) {

15. //process the results

16.System.out.println(“Employee ID: “+ rs.getInt(“id”));

17.}

18. } catch (Exception e) {

19. System.out.println (“Error”);

20. }

Assume that:

The required database driver is configured in the classpath.

The appropriate database is accessible with the dbURL, userName, and passWord exists.

The Employee and Customer tables are available and each table has id column with a few records and the SQL queries are valid.

What is the result of compiling and executing this code fragment?

Given the definition of the Emp class:

public class Emp

private String eName;

private Integer eAge;

Emp(String eN, Integer eA) {

this.eName = eN;

this.eAge = eA;

}

public Integer getEAge () {return eAge;}

public String getEName () {return eName;}

}

and code fragment:

Listli = Arrays.asList(new Emp(“Sam”, 20), New Emp(“John”, 60), New Emp(“Jim”, 51));

Predicate agVal = s -> s.getEAge() > 50;//line n1

li = li.stream().filter(agVal).collect(Collectors.toList());

Stream names = li.stream()map.(Emp::getEName);//line n2

names.forEach(n -> System.out.print(n + “ “));

What is the result?

Given the code fragment:

Path source = Paths.get (“/data/december/log.txt”);

Path destination = Paths.get(“/data”);

Files.copy (source, destination);

and assuming that the file /data/december/log.txt is accessible and contains:

10-Dec-2014 – Executed successfully

What is the result?

Which two statements are true about the Fork/Join Framework? (Choose two.)

Given:

Which is refactored code with functional interfaces?