Java SE 8 Programmer II - 1z0-809 Exam Practice Test

Question 1

Given:

What is the result?

A. Baz Hello

B. Bar HelloFoo Hello

C. Bar HelloBaz Hello

D. A compilation error occurs in the Daze class.

Correct Answer: C

Question 2

Given the code fragment:

Which code fragment, when inserted at line n1, ensures false is printed?

A. boolean b = cs.stream() .anyMatch (w -> w.equals ("Java"));

B. boolean b = cs.stream() .allMatch(w -> w.equals("Java"));

C. boolean b = cs.stream() .findFirst() .get() .equals("Java");

D. boolean b = cs.stream() .findAny() .get() .equals("Java");

Correct Answer: A

Question 3

Given:
class FuelNotAvailException extends Exception { }
class Vehicle {
void ride() throws FuelNotAvailException {//line n1
System.out.println("Happy Journey!");
}
}
class SolarVehicle extends Vehicle {
public void ride () throws Exception {//line n2
super ride ();
}
}
and the code fragment:
public static void main (String[] args) throws FuelNotAvailException, Exception { Vehicle v = new SolarVehicle (); v.ride();
}
Which modification enables the code fragment to print Happy Journey!?

A. Replace line n2 with private void ride() throws FuelNotAvailException {

B. Replace line n2 with void ride() throws Exception {

C. Replace line n1 with public void ride() throws FuelNotAvailException {

D. Replace line n1 with protected void ride() throws Exception {

Correct Answer: D

Question 4

Given the code fragment:

What is the result?

A. A compilation error occurs because the IOException isn't declared to be thrown or caught?

B. A compilation error occurs at line n1.

C. A compilation error occurs at line n2.

D. The code reads the password without echoing characters on the console.

Correct Answer: B

Question 5

Given the code fragment:
class CallerThread implements Callable<String> {
String str;
public CallerThread(String s) {this.str=s;}
public String call() throws Exception {
return str.concat("Call");
}
}
and
public static void main (String[] args) throws InterruptedException, ExecutionException
{
ExecutorService es = Executors.newFixedThreadPool(4); //line n1
Future f1 = es.submit (newCallerThread("Call"));
String str = f1.get().toString();
System.out.println(str);
}
Which statement is true?

A. The program prints Call Call and does not terminate.

B. An ExecutionException is thrown at run time.

C. The program prints Call Call and terminates.

D. A compilation error occurs at line n1.

Correct Answer: A

Question 6

Given the code fragment:
ZonedDateTime depart = ZonedDateTime.of(2015, 1, 15, 1, 0, 0, 0, ZoneID.of("UTC-7")); ZonedDateTime arrive = ZonedDateTime.of(2015, 1, 15, 9, 0, 0, 0, ZoneID.of("UTC-5")); long hrs = ChronoUnit.HOURS.between(depart, arrive); //line n1 System.out.println("Travel time is" + hrs + "hours"); What is the result?

A. Travel time is 6 hours

B. Travel time is 4 hours

C. An exception is thrown at line n1.

D. Travel time is 8 hours

Correct Answer: D

Question 7

Given the code fragments:
class ThreadRunner implements Runnable {
public void run () { System.out.print ("Runnable") ; }
}
class ThreadCaller implements Callable {
Public String call () throws Exception {return "Callable"; )
}
and
ExecutorService es = Executors.newCachedThreadPool ();
Runnable r1 = new ThreadRunner ();
Callable c1 = new ThreadCaller ();
// line n1
es.shutdown();
Which code fragment can be inserted at line n1 to start r1 and c1 threads?

A. es.execute (r1);Future<String> f1 = es.execute (c1) ;

B. Future<String> f1 = (Future<String>) es.submit (r1);es.execute (c1);

C. Future<String> f1 = (Future<String>) es.execute(r1);Future<String> f2 = (Future<String>) es.execute (c1);

D. es.submit(r1);Future<String> f1 = es.submit (c1);

Correct Answer: D

Question 8

Given the code fragments:

and

Which two modifications enable to sort the elements of the emps list? (Choose two.)

A. At line n2 insertpublic int compare (Person p1, Person p2) {return p1.name.compareTo (p2.name);}

B. Replace line n1 withclass Person implements Comparator<Person>

C. At line n2 insertpublic int compareTo (Person p) {return this.name.compareTo (p.name);}

D. At line n2 insert:public int compareTo (Person p, Person p2) {return p1.name.compareTo (p2.name);}

E. Replace line n1 withclass Person implements Comparable<Person>

F. Replace line n1 withclass Person extends Comparator<Person>

Correct Answer: C,E

Question 9

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?

A. compilation fails on line 13.

B. The program prints employee IDs.

C. The program prints Error.

D. The program prints customer IDs.

Correct Answer: C

Question 10

Given the code fragments:
interface CourseFilter extends Predicate<String> {
public default boolean test (String str) {
return str.contains ("Java");
}
}
and
List<String> strs = Arrays.asList("Java", "Java EE", "Embedded Java");
Predicate<String> cf1 = s - > s.length() > 3;
Predicate cf2 = new CourseFilter() { //line n1
public boolean test (String s) {
return s.startsWith ("Java");
}
};
long c = strs.stream()
.filter(cf1)
.filter(cf2//line n2
.count();
System.out.println(c);
What is the result?

A. 2

B. 3

C. A compilation error occurs at line n1.

D. A compilation error occurs at line n2.

Correct Answer: D

Question 11

Given the code fragments:
class Employee {
Optional<Address> address;
Employee (Optional<Address> address) {
this.address = address;
}
public Optional<Address> getAddress() { return address; }
}
class Address {
String city = "New York";
public String getCity { return city: }
public String toString() {
return city;
}
}
and
Address address = new Address;
Optional<Address> addrs1 = Optional.ofNullable (address);
Employee e1 = new Employee (addrs1);
String eAddress = (addrs1.isPresent()) ? addrs1.get().getCity() : "City Not available"; System.out.println(eAddress); What is the result?

A. New York

B. null

C. A NoSuchElementException is thrown at run time.

D. City Not available

Correct Answer: B

Question 12

Given the content of the files:

Given the code fragment from the Test. java file:

What is the result?

A. Hi!

B. A MissingResourceException is thrown at run time.

C. Have a nice day!

D. Compilation fails at line 14.

Correct Answer: D

Oracle Java SE 8 Programmer II - 1z0-809 Exam Practice Test

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