24 January, 2022
How Many Questions Of 1Z0-809 Training Tools
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Question 1
Given the code fragment:
What is the result?
What is the result?
Question 2
Given the code fragment:
Which code fragment, when inserted at line n1, enables the code to print /First.txt?
Which code fragment, when inserted at line n1, enables the code to print /First.txt?
Question 3
The data.doc, data.txt and data.xml files are accessible and contain text. Given the code fragment:
Stream paths = Stream.of (Paths. get(“data.doc”),
Paths. get(“data.txt”),
Paths. get(“data.xml”));
paths.filter(s-> s.toString().endWith(“txt”)).forEach( s -> {
try { Files.readAllLines(s)
.stream()
.f orEach(System.out::println); //line n1
} catch (IOException e) { System.out.println(“Exception”);
}
}
);
What is the result?
Stream
Paths. get(“data.txt”),
Paths. get(“data.xml”));
paths.filter(s-> s.toString().endWith(“txt”)).forEach( s -> {
try { Files.readAllLines(s)
.stream()
.f orEach(System.out::println); //line n1
} catch (IOException e) { System.out.println(“Exception”);
}
}
);
What is the result?
Question 4
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?
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?
Question 5
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?
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?
Question 6
Which statement is true about java.util.stream.Stream?
Question 7
Given the code fragment:
and the information:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, username, and passWord exists. What is the result?
and the information:
The required database driver is configured in the classpath. The appropriate database is accessible with the dbURL, username, and passWord exists. What is the result?
Question 8
Given:
and the code fragment:
Which definition of the ColorSorter class sorts the blocks list?
and the code fragment:
Which definition of the ColorSorter class sorts the blocks list?
Question 9
Given: Book.java:
public class Book {
private String read(String bname) { return “Read” + bname }
}
EBook.java:
public class EBook extends Book {
public class String read (String url) { return “View” + url }
}
Test.java:
public class Test {
public static void main (String[] args) { Book b1 = new Book();
b1.read(“Java Programing”); Book b2 = new EBook();
b2.read(“http://ebook.com/ebook”);
}
}
What is the result?
public class Book {
private String read(String bname) { return “Read” + bname }
}
EBook.java:
public class EBook extends Book {
public class String read (String url) { return “View” + url }
}
Test.java:
public class Test {
public static void main (String[] args) { Book b1 = new Book();
b1.read(“Java Programing”); Book b2 = new EBook();
b2.read(“http://ebook.com/ebook”);
}
}
What is the result?
Question 10
Which two statements are true about localizing an application? (Choose two.)
Question 11
Given the code fragments:
interface CourseFilter extends Predicate { public default boolean test (String str) {
return str.equals (“Java”);
}
}
and
List strs = Arrays.asList(“Java”, “Java EE”, “Java ME”); Predicate cf1 = s - > s.length() > 3;
Predicate cf2 = new CourseFilter() { //line n1 public boolean test (String s) {
return s.contains (“Java”);
}
};
long c = strs.stream()
.filter(cf1)
.f ilter(cf2 //line n2
.count(); System.out.println(c); What is the result?
interface CourseFilter extends Predicate
return str.equals (“Java”);
}
}
and
List
Predicate cf2 = new CourseFilter() { //line n1 public boolean test (String s) {
return s.contains (“Java”);
}
};
long c = strs.stream()
.filter(cf1)
.f ilter(cf2 //line n2
.count(); System.out.println(c); What is the result?
Question 12
In 2015, daylight saving time in New York, USA, begins on March 8th at 2:00 AM. As a result, 2:00 AM becomes 3:00 AM.
Given the code fragment:
Which is the result?
Given the code fragment:
Which is the result?
Question 13
Given:
and the code fragment:
What is the result?
and the code fragment:
What is the result?
Question 14
Given the content of Operator.java, EngineOperator.java, and Engine.java files:
and the code fragment:
What is the result?
and the code fragment:
What is the result?
Question 15
Given the code fragments:
and
What is the result?
and
What is the result?
Question 16
Given the code fragment:
Which modification enables the code to print Price 5 New Price 4?
Which modification enables the code to print Price 5 New Price 4?
Question 17
Given the code fragments:
and
What is the result?
and
What is the result?
Question 18
Given the content:
and given the code fragment:
Which two code fragments, when inserted at line 1 independently, enable the code to print “Wie geht’s?”
and given the code fragment:
Which two code fragments, when inserted at line 1 independently, enable the code to print “Wie geht’s?”
Question 19
Given:
interface Doable {
public void doSomething (String s);
}
Which two class definitions compile? (Choose two.)
interface Doable {
public void doSomething (String s);
}
Which two class definitions compile? (Choose two.)