Winter Special Limited Time 65% Discount Offer - Ends in 0d 00h 00m 00s - Coupon code: netbudy65

Dumpsbuddy Logo
  1. Home
  2. Oracle
  3. Java SE
  4. 1z0-819
  5. Java SE 11 Developer Questions and Answers

1z0-819 Java SE 11 Developer Questions and Answers

Questions 4

Given:

Which is true?

Options:

A.

The code compiles but does not print any result.

B.

The code prints 25.

C.

The code does not compile.

D.

The code throws an exception at runtime.

Buy Now
Questions 5

Which interface in the java.util.function package can return a primitive type?

Options:

A.

ToDoubleFunction

B.

Supplier

C.

BiFunction

D.

LongConsumer

Buy Now
Questions 6

What makes Java dynamic?

Options:

A.

At runtime, classes are loaded as needed, and new code modules can be loaded on demand.

B.

The runtime can process machine language sources as well as executables from different language compilers.

C.

The Java compiler uses reflection to test if class methods are supported by resources of a target platform.

D.

The Java compiler preprocesses classes to run on specific target platforms.

Buy Now
Questions 7

Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

Options:

A.

A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.

B.

A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.

C.

An implementation of country.countryDetails can be added to the main module.

D.

To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.

E.

To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.

Buy Now
Questions 8

You are working on a functional bug in a tool used by your development organization. In your investigation, you find that the tool is executed with a security policy file containing this grant.

What action should you take?

Options:

A.

Nothing, because it is an internal tool and not exposed to the public.

B.

Remove the grant because it is excessive.

C.

Nothing, because it is not related to the bug you are investigating.

D.

File a security bug against the tool referencing the excessive permission granted.

E.

Nothing, because listing just the required permissions would be an ongoing maintenance challenge.

Buy Now
Questions 9

Given the content:

What Is the result?

A)

B)

C)

D)

E)

User Username

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

E.

Option

Buy Now
Questions 10

Which code fragment added to line 1 enables the code to compile and print Hello Joe?

A)

B)

C)

D)

Options:

Buy Now
Questions 11

Given:

What is the result?

Options:

A.

Take extra care

B.

The program prints nothing.

C.

Take extra care

Take extra care

D.

An exception is thrown at runtime

Buy Now
Questions 12

Given:

Which two methods facilitate valid ways to read instance fields? (Choose two.)

Options:

A.

getTCount

B.

getACount

C.

getTotalCount

D.

getCCount

E.

getGCount

Buy Now
Questions 13

Given:

executed using this command:

java Myclass My Car is red

What is the output of this class?

Options:

A.

Car--red--My

B.

My--Car--is

C.

My--is--java

D.

java--Myclass--My

E.

Myclass--Car--red

Buy Now
Questions 14

Given:

Which is true?

Options:

A.

The compilation fails due to an error in line 6.

B.

The compilation succeeds.

C.

The compilation fails due to an error in line 4.

D.

The compilation fails due to an error in line 10.

E.

The compilation fails due to an error in line 7.

F.

The compilation fails due to an error in line 9.

G.

The compilation fails due to an error in line 2.

Buy Now
Questions 15

Which three initialization statements are correct? (Choose three.)

Options:

A.

int[][][] e = {{1,1,1},{2,2,2}};

B.

short sh = (short)’A’;

C.

float x = 1f;

D.

byte b = 10;

char c = b;

E.

String contact# = “(+2) (999) (232)”;

F.

int x = 12_34;

G.

boolean false = (4 != 4);

Buy Now
Questions 16

Which two commands are used to identify class and module dependencies? (Choose two.)

Options:

A.

jmod describe

B.

java Hello.java

C.

jdeps --list-deps

D.

jar --show-module-resolution

E.

java --show-module-resolution

Buy Now
Questions 17

Given:

And the command:

java Main Helloworld

What is the result ?

Options:

A.

Input: Echo:

B.

Input: Helloworld Echo: Helloworld

C.

Input:

Then block until any input comes from System.in.

D.

Input:

Echo: Helloworld

E.

A NullPointerException is thrown at run time.

Buy Now
Questions 18

Given:

What is the result?

Options:

A.

385

B.

3

C.

The compilation fails.

D.

80

E.

25

Buy Now
Questions 19

Given:

What is the result?

Options:

A.

Good Morning, Potter

B.

Good Night, Potter

C.

Good Morning, Harry

D.

Good Night, Harry

Buy Now
Questions 20

You replace the code on line 1 to use ParallelStream.

Which one is correct?

Options:

A.

The code will produce the same result.

B.

The compilation fails.

C.

A NoSuchElementException is thrown at run time.

D.

The code may produce a different result.

Buy Now
Questions 21

Given:

What must be added in line 1 to compile this class?

Options:

A.

catch(IOException e) { }

B.

catch(FileNotFoundException | IndexOutOfBoundsException e) { }

C.

catch(FileNotFoundException | IOException e) { }

D.

catch(IndexOutOfBoundsException e) { }catch(FileNotFoundException e) { }

E.

catch(FileNotFoundException e) { }catch(IndexOutOfBoundsException e) { }

Buy Now
Questions 22

Given:

What is the result?

Options:

A.

compilation error

B.

0 5

C.

6 13

D.

5 12

Buy Now
Questions 23

Given:

Which statement is true about the Fox class?

Options:

A.

Fox class does not have to override inhabit method, so long as it does not try to call it.

B.

Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.

C.

Fox class must implement either Forest or Town interfaces, but not both.

D.

The inhabit method implementation from the first interface that Fox implements will take precedence.

E.

Fox class must provide implementation for the inhabit method.

Buy Now
Questions 24

Given:

and

Which two method definitions at line n1 in the Bar class compile? (Choose two.)

Options:

A.

public List foo(Set m) {...}

B.

public List foo(Set m) {...}

C.

public List foo(TreeSet m) {...}

D.

public List foo(Set m) {...}

E.

public ArrayList foo(Set m) {...}

F.

public ArrayList foo(Set m) {...}

Buy Now
Questions 25

A bookstore's sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.

public class Sale {

private String customer;

private List items;

// constructor, setters and getters not shown

}

public class Book {

private String name;

private double price;

// constructor, setters and getters not shown

}

Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Buy Now
Questions 26

Given:

Which two constructors will compile and set the class field strings? (Choose two.)

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

E.

Option E

Buy Now
Questions 27

Given:

What is the result?

Options:

A.

2,34,34,5

B.

2,34,54,5

C.

2,54,54,5

D.

2,34,54,3

Buy Now
Questions 28

Which two interfaces are considered to be functional interfaces? (Choose two.)

Options:

A.

@FunctionalInterface

interface InterfaceC {

public boolean equals(Object o);

int breed(int x);

int calculate(int x, int y);

}

B.

@FunctionalInterface

interface InterfaceD {

int breed(int x);

}

C.

@FunctionalInterface

interface InterfaceE {

public boolean equals(int i);

int breed(int x);

}

D.

interface InterfaceA {

int GERM = 13;

public default int getGERM() { return GERM; }

}

E.

interface InterfaceB {

int GERM = 13;

public default int getGERM() { return get(); }

private int get() { return GERM; }

public boolean equals(Object o);

int breed(int x);

Buy Now
Questions 29

Given the content from the course.txt file:

Which code fragment at line 1 prints the lines that contain Java from the course.txt file?

A)

B)

C)

D)

E)

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

E.

Option E

Buy Now
Questions 30

Given:

What is the result?

Options:

A.

is it 1

B.

An IndexOutOfBoundsException is thrown at runtime.

C.

is it 0

D.

this is it 2

E.

this is it 3

Buy Now
Questions 31

Given:

Which option should you choose to enable the code to print Something happened?

Options:

A.

Add extends GeneralException on line 1.

Add extends Exception on line 2.

B.

Add extends SpecificException on line 1.

Add extends GeneralException on line 2.

C.

Add extends Exception on line 1.

Add extends Exception on line 2.

D.

Add extends Exception on line 1.

Add extends GeneralException on line 2.

Buy Now
Questions 32

Given:

What is the result?

Options:

A.

A java.util.NoSuchElementException is thrown at run time.

B.

Ans : a

C.

The compilation fails.

D.

Ans :

Buy Now
Questions 33

Given:

Which statement on line 1 enables this code to compile?

Options:

A.

Consumer function = (String f) -> (System.out.println(f);};

B.

Supplier function = () -> fruits.get (0);

C.

Predicate function = a -> a.equals("banana");

D.

Function function = x -> x.substring(0,2);

Buy Now
Questions 34

Given the code fragment:

How many lines of text does this program print?

Options:

A.

four

B.

one

C.

three

D.

two

Buy Now
Questions 35

Which two var declarations are correct? (Choose two.)

Options:

A.

var names = new ArrayList<>();

B.

var _ = 100;

C.

var var = “hello”;

D.

var y = null;

E.

var a;

Buy Now
Questions 36

Why does this compilation fail?

Options:

A.

The method Y. print (object) does not call the method super.print (object)

B.

The method x. print (object) is not accessible to Y.

C.

In method x. print (Collection), system. Out :: prints is an invalid Java identifier.

D.

The method print (object) and the method print (object…) are duplicates of each other.

E.

The method Y. print (object…) cannot override the final method x.print (object….).

Buy Now
Questions 37

Given:

Which three actions implement Java SE security guidelines? (Choose three.)

Options:

A.

Change line 7 to return names.clone();.

B.

Change line 4 to this.names = names.clone();.

C.

Change the getNames() method name to get$Names().

D.

Change line 6 to public synchronized String[] getNames() {.

E.

Change line 2 to private final String[] names;.

F.

Change line 3 to private Secret(String[] names) {.

G.

Change line 2 to protected volatile String[] names;.

Buy Now
Questions 38

Given:

How many LocalDate objects are created in this example?

Options:

A.

2

B.

3

C.

4

D.

5

Buy Now
Exam Code: 1z0-819
Exam Name: Java SE 11 Developer
Last Update: Dec 3, 2024
Questions: 296

PDF + Testing Engine

$140
buy now 1z0-819 pdf + testing engine

Testing Engine

$105
buy now 1z0-819 testing engine

PDF (Q&A)

$90
buy now 1z0-819 pdf