[Feb 06, 2022] New Real 1z0-809 Exam Dumps Questions
Pass Your 1z0-809 Exam Easily with Accurate Java SE 8 Programmer II PDF Questions
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NEW QUESTION 42
Given the code fragment:
What is the result?
- A. [green, red, yellow, cyan]
- B. [green, blue, yellow, cyan]
- C. (green, red, cyan, yellow)
- D. An IndexOutOfBoundsException is thrown at runtime.
Answer: A
NEW QUESTION 43
Given:
From what threading problem does the program suffer?
- A. starvation
- B. livelock
- C. race condition
- D. deadlock
Answer: D
NEW QUESTION 44
Given the code fragment:
public void recDelete (String dirName) throws IOException {
File [ ] listOfFiles = new File (dirName) .listFiles();
if (listOfFiles ! = null && listOfFiles.length >0) {
for (File aFile : listOfFiles) {
if (aFile.isDirectory ()) {
recDelete (aFile.getAbsolutePath ());
} else {
if (aFile.getName ().endsWith (".class"))
aFile.delete ();
}
}
}
}
Assume that Projectscontains subdirectories that contain .classfiles and is passed as an argument to the recDelete ()method when it is invoked.
What is the result?
- A. The method throws an IOException.
- B. The method executes and does not make any changes to the Projectsdirectory.
- C. The method deletes all the .classfiles in the Projectsdirectory and its subdirectories.
- D. The method deletes the .classfiles of the Projectsdirectory only.
Answer: D
NEW QUESTION 45
Which two statements are true about localizing an application? (Choose two.)
- A. Support for new regional languages does not require recompilation of the code.
- B. Language and region-specific programs are created using localized data.
- C. Language codes use lowercase letters and region codes use uppercase letters.
- D. Resource bundle files include data and currency information.
- E. Textual elements (messages and GUI labels) are hard-coded in the code.
Answer: A,C
NEW QUESTION 46
Given:
and the code fragment:
Which two code fragments, when inserted at line n1independently, enable the code to print TruckCarBike?
- A. .sorted (Comparable.comparing (Vehicle: :getVName)).reversed ()
- B. .sorted ((v1, v2) -> v1.getVId() < v2.getVId())
- C. .sorted((v1, v2) -> Integer.compare(v1.getVId(), v2.getVid()))
- D. .sorted(Comparator.comparing ((Vehicle v) -> v.getVId()))
- E. .map (v -> v.getVid())
.sorted ()
Answer: C
NEW QUESTION 47
Given the code fragment:
List<Integer> list1 = Arrays.asList(10, 20);
List<Integer> list2 = Arrays.asList(15, 30);
//line n1
Which code fragment, when inserted at line n1, prints 10 20 15 30?
- A. list1.stream().flatMap(list2.stream().flatMap(e1 -> e1.stream()).forEach(s -> System.out.println(s + "
")); - B. Stream.of(list1, list2).flatMap(list -> list.intStream()).forEach(s -> System.out.print(s + " "));
- C. Stream.of(list1, list2).flatMap(list -> list.stream()).forEach(s -> System.out.print(s + " "));
- D. Stream.of(list1, list2).flatMapToInt(list -> list.stream()).forEach(s -> System.out.print(s + " "));
Answer: C
NEW QUESTION 48
Given the code fragment:
List<String> empDetails = Arrays.asList("100, Robin, HR",
" 200, Mary, AdminServices",
" 101, Peter, HR");
empDetails.stream()
.filter(s-> s.contains("1"))
.sorted()
.forEach(System.out::println); //line n1
What is the result?
- A. A compilation error occurs at line n1.
- B. 100, Robin, HR
1 01, Peter, HR
2 00, Mary, AdminServices - C. 100, Robin, HR
2 00, Mary, AdminServices
1 01, Peter, HR - D. 100, Robin, HR
101, Peter, HR
Answer: B
NEW QUESTION 49
Given that these files exist and are accessible:
and given the code fragment:
Which code fragment can be inserted at line n1 to enable the code to print only /company/emp?
- A. Stream<Path> stream = Files.walk (Paths.get ("/company"));
- B. Stream<Path> stream = Files.list (Paths.get ("/company/emp"));
- C. Stream<Path> stream = Files.list (Paths.get ("/company"));
- D. Stream<Path> stream = Files.find(Paths.get ("/company"), 1,(p,b) -> b.isDirectory (), FileVisitOption.FOLLOW_LINKS);
Answer: D
NEW QUESTION 50
Given the code fragment:
Which code fragment, when inserted at line 3, enables the code to print 10:20?
- A. int [ ] array = new int [2] ;
- B. int [ ] array;
- C. int array = new int [2] ;
- D. int array [2] ;
Answer: A
NEW QUESTION 51
Given:
class UserException extends Exception { }
class AgeOutOfLimitException extends UserException { }
and the code fragment:
class App {
public void doRegister(String name, int age)
throws UserException, AgeOutOfLimitException {
if (name.length () < 6) {
throw new UserException ();
} else if (age >= 60) {
throw new AgeOutOfLimitException ();
} else {
System.out.println(“User is registered.”);
}
}
public static void main(String[ ] args) throws UserException {
App t = new App ();
t.doRegister(“Mathew”, 60);
}
}
What is the result?
User is registered.
- A.
- B. An AgeOutOfLimitExceptionis thrown.
- C. A compilation error occurs in the mainmethod.
- D. A UserExceptionis thrown.
Answer: B
NEW QUESTION 52
Which class definition compiles?
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: A
NEW QUESTION 53
Given the code fragments:
What is the result?
- A. Too1 :: export
Too1 :: export - B. RToo1 :: export
Too1 :: export - C. Compilation fails only at line n2.
- D. Compilation fails at both line n1 and line n2.
- E. Compilation fails only at line n1.
Answer: E
NEW QUESTION 54
Which two are Java Exception classes?
- A. IllegalArgumentException
- B. DuplicatePathException
- C. TooManyArgumentsException
- D. SercurityException
Answer: A,D
NEW QUESTION 55
Given the definition of the Vehicle class:
class Vehicle {
String name;
void setName (String name) {
this.name = name;
}
String getName() {
return name;
}
}
Which action encapsulates the Vehicle class?
- A. Make the setName method private.
- B. Make the name variable private.
- C. Make the name variable public.
- D. Make the setName method public.
- E. Make the Vehicle class public.
- F. Make the getName method private.
Answer: B
NEW QUESTION 56
Given the code fragment:
What is the result?
- A. An exception is thrown at runtime.
- B. 2014-05-04T00:00.000
- C. May 04, 2014T00:00:00.000
- D. 5/4/14T00:00:00.000
Answer: A
NEW QUESTION 57
Given:
What is the result?
- A. Hi MyClass
- B. A compilation error occurs.
- C. Hi Interface-1
- D. Hi Interface-2
Answer: A
NEW QUESTION 58
Given:
class Student {
String course, name, city;
public Student (String name, String course, String city) {
this.course = course; this.name = name; this.city = city;
}
public String toString() {
return course + ":" + name + ":" + city;
}
and the code fragment:
List<Student> stds = Arrays.asList(
new Student ("Jessy", "Java ME", "Chicago"),
new Student ("Helen", "Java EE", "Houston"),
new Student ("Mark", "Java ME", "Chicago"));
stds.stream()
. collect(Collectors.groupingBy(Student::getCourse))
. forEach(src, res) -> System.out.println(scr));
What is the result?
- A. A compilation error occurs.
- B. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
[Java EE: Helen:Houston] - C. Java EE
Java ME - D. [Java EE: Helen:Houston]
[Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
Answer: B
NEW QUESTION 59
Given the following segment of code:
Which two statements, If either were true, would make the code compile?
- A. Vehicle is a superclass of MotorCycle.
- B. MotorCycle is an interface that implements the Vehicle class.
- C. Vehicle is an interface that is implemented by the Motorcycle class.
- D. Vehicle and MotorCycle both extend the Transportation superclass.
- E. motorCycle is a superclass of vehicle.
- F. Vehicle and MotorCycle both implement the Transportation interface.
Answer: A,C
NEW QUESTION 60
Given:
class Worker extends Thread {
CyclicBarrier cb;
public Worker(CyclicBarrier cb) { this.cb = cb; }
public void run () {
try {
cb.await();
System.out.println("Worker...");
} catch (Exception ex) { }
}
}
class Master implements Runnable { //line n1
public void run () {
System.out.println("Master...");
}
}
and the code fragment:
Master master = new Master();
//line n2
Worker worker = new Worker(cb);
worker.start();
You have been asked to ensure that the run methods of both the Worker and Master classes are executed.
Which modification meets the requirement?
- A. At line n2, insert CyclicBarrier cb = new CyclicBarrier(2, master);
- B. At line n2, insert CyclicBarrier cb = new CyclicBarrier(1, master);
- C. Replace line n1 with class Master extends Thread {
- D. At line n2, insert CyclicBarrier cb = new CyclicBarrier(master);
Answer: C
NEW QUESTION 61
Given the code fragment:
public class Foo {
public static void main (String [ ] args) {
Map<Integer, String> unsortMap = new HashMap<> ( );
unsortMap.put (10, "z");
unsortMap.put (5, "b");
unsortMap.put (1, "d");
unsortMap.put (7, "e");
unsortMap.put (50, "j");
Map<Integer, String> treeMap = new TreeMap <Integer, String> (new
Comparator<Integer> ( ) {
@ Override public int compare (Integer o1, Integer o2) {return o2.compareTo (o1); } } ); treeMap.putAll (unsortMap); for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) { System.out.print (entry.getValue () + " ");
}
}
}
What is the result?
- A. d b e z j
- B. A compilation error occurs.
- C. z b d e j
- D. j z e b d
Answer: D
NEW QUESTION 62
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 FuelNotAvailException {//line n2
super ride ();
}
}
and the code fragment:
public static void main (String[] args) throws Exception {
Vehicle v = new SolarVehicle ();
v.ride();
}
Which modification enables the code fragment to print Happy Journey!?
- A. Replace line n2 with void ride() throws Exception {
- B. Replace line n1 with public void ride() throws FuelNotAvailException {
- C. Replace line n1 with protected void ride() throws Exception {
- D. Replace line n2 with private void ride() throws FuelNotAvailException {
Answer: A
NEW QUESTION 63
Given:
and the code fragment:
What is the result?
- A. A compilation error occurs.
- B. 2000.0
- C. 0.0
- D. 1500.0
Answer: D
NEW QUESTION 64
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?
- A. A compilation error occurs at line n1.
- B. A compilation error occurs at line n3.
- C. A compilation error occurs at line n2.
- D. Velocity with new speed
Answer: D
NEW QUESTION 65
Given the code fragment:
What is the result?
- A. AnArrayIndexOutOfBoundsException is thrown at runtime
- B. 0
- C. Compilation fails
- D. 1
- E. 2
Answer: E
NEW QUESTION 66
Given the structure of the Student table:
Student (id INTEGER, name VARCHAR)
Given the records from the STUDENT table:
Given the code fragment:
Assume that:
What is the result?
- A. The program prints Status: false and two records are deleted from the Student table.
- B. The program prints Status: false but the records from the Student table are not deleted.
- C. A SQLException is thrown at runtime.
- D. The program prints Status: true and two records are deleted from the Student table.
Answer: A
NEW QUESTION 67
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