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Premium PassLeader 1Z0-809 Dumps with VCE and PDF Download (Question 61 - Question 70)



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QUESTION 61

Given:

passleader-1Z0-809-dumps-611

What is the result?

A.    Good Day!

Good Luck!

B.    Good Day!

Good Day!

C.    Good Luck!

Good Day!

D.    Good Luck!

Good Luck!

E.    Compilation fails

Answer: E

QUESTION 62

Given the code fragment:

List<String> listVal = Arrays.asList("Joe", "Paul", "Alice", "Tom");

System.out.println (

// line n1

);

Which code fragment, when inserted at line n1, enables the code to print the count of string elements whose length is greater than three?

A.    listVal.stream().filter(x -> x.length()>3).count()

B.    listVal.stream().map(x -> x.length()>3).count()

C.    listVal.stream().peek(x -> x.length()>3).count().get()

D.    listVal.stream().filter(x -> x.length()>3).mapToInt(x -> x).count()

Answer: C

QUESTION 63

Which statement is true about java.util.stream.Stream?

A.    A stream cannot be consumed more than once.

B.    The execution mode of streams can be changed during processing.

C.    Streams are intended to modify the source data.

D.    A parallel stream is always faster than an equivalent sequential stream.

Answer: B

QUESTION 64

Given the code fragment:

String str = "Java is a programming language";

ToIntFunction<String> indexVal = str: : indexOf;

//line n1

int x = indexVal.applyAsInt("Java");

//line n2

System.out.println(x);

What is the result?

A.    0

B.    1

C.    A compilation error occurs at line n1

D.    A compilation error occurs at line n2

Answer: A

QUESTION 65

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<String> fc = Files.readAllLines (file); fc.forEach (s - > System.out.println(s));

C.    List<String> fc = readAllLines(file);

fc.stream().forEach (s - > System.out.println(s));

D.    Stream<String> fc = Files.lines (file);

fc.forEach (s - > System.out.println(s));

Answer: B

QUESTION 66

Given:

passleader-1Z0-809-dumps-661

Which two classes use the shape class correctly? (Choose two.)

passleader-1Z0-809-dumps-662

A.    Option A

B.    Option B

C.    Option C

D.    Option D

E.    Option E

F.    Option F

Answer: BE

Explanation:

When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class (E). However, if it does not, then the subclass must also be declared abstract (B).

Note:

An abstract class is a class that is declared abstract-it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.

QUESTION 67

Given:

public enum USCurrency {

PENNY (1),

NICKLE(5),

DIME (10),

QUARTER(25);

private int value;

public USCurrency(int value) {

this.value = value;

}

public int getValue() {return value;}

}

public class Coin {

public static void main (String[] args) {

USCurrency usCoin =new USCurrency.DIME;

System.out.println(usCoin.getValue()):

}

}

Which two modifications enable the given code to compile? (Choose two.)

A.    Nest the USCurrency enumeration declaration within the Coin class.

B.    Make the USCurrency enumeration constructor private.

C.    Remove the new keyword from the instantion of usCoin.

D.    Make the getter method of value as a static method.

E.    Add the final keyword in the declaration of value.

Answer: AE

QUESTION 68

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?

A.    The program prints several values that total 55.

B.    The program prints 55.

C.    A compilation error occurs at line n1.

D.    The program prints several values whose sum exceeds 55.

Answer: C

QUESTION 69

Given the code format:

passleader-1Z0-809-dumps-691

Which code fragment must be inserted at line 6 to enable the code to compile?

A.    DBConfiguration f;

return f;

B.    Return DBConfiguration;

C.    Return new DBConfiguration;

D.    Retutn 0;

Answer: B

QUESTION 70

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:

List<Emp>li = Arrays.asList(new Emp(“Sam”, 20), New Emp(“John”, 60), New Emp(“Jim”,

51));

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

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

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

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

What is the result?

A.    Sam John Jim

B.    John Jim

C.    A compilation error occurs at line n1

D.    A compilation error occurs at line n2

Answer: A


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