A fully updated 2023 1z1-819 Exam Dumps exam guide from training expert TestKingFree [Q59-Q83]

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A fully updated 2023 1z1-819 Exam Dumps exam guide from training expert TestKingFree

Provides complete coverage of every objective on exam and exam preparation 1z1-819

Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819

The following will be discussed in the ORACLE 1Z0-006 exam dumps:

Deploy and execute modular applications, including automatic modules
Utilize polymorphism and casting to call methods, differentiate object type versus reference type
Create and use enumerations
Declare and instantiate Java objects including nested class objects, and explain objects’ lifecycles (including creation, dereferencing by reassignment, and garbage collection)
Create and use subclasses and superclasses, including abstract classes
Create, apply, and process annotations
Read and write console and file data using I/O Streams

Passing the Oracle 1z1-819 Exam demonstrates a deep understanding of Java programming principles, and can be a valuable asset for developers looking to advance their careers. Many employers seek out individuals with Java certifications, recognizing that certification holders have invested significant time and resources in developing their skills and knowledge. Additionally, the Oracle 1z1-819 Exam is updated regularly to reflect changes in the Java programming language and current industry best practices, meaning that certification holders are always up-to-date on the latest developments in the field.

QUESTION 59
Given:

Which is true?

System.out is the standard output stream. The stream is open only when System.out is called.

System.in cannot reassign the other stream.

System.out is an instance of java.io.OutputStream by default.

System.in is the standard input stream. The stream is already open.

QUESTION 60
Given:

What is the result?

2,34,34,5

2,34,54,5

2,54,54,5

2,34,54,3

QUESTION 61
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<Book> 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?

Option A

Option B

Option C

Option D

QUESTION 62
Given:

You want to calculate the average of the Player’s score.
Which statement inserted on line 1 will accomplish this?

players.stream().average().orElse(0.0);

players.stream().mapToInt(a -> a.score).average().orElse(0.0);

players.stream().mapToDouble(a -> a.score).average();

players.stream().map(a -> a.score).average();

QUESTION 63
Given:

Which three classes successfully override printOne()? (Choose three.)

Option A

Option B

Option C

Option D

Option E

Option F

QUESTION 64
Given:

What is the result?

The compilation fails due to an error in line 4.

The compilation fails due to an error in line 3.

The compilation fails due to an error in line 2.

The compilation fails due to an error in line 1.

The compilation fails due to an error in line 5.

QUESTION 65
Given:

What is the result?

[A, B, C]
followed by an exception thrown on line 11.

[A, B, C]
[A, B]

[A, B, C]
[A, B, C]

On line 9, an exception is thrown at run time.

QUESTION 66
Given:

Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)

public List<Integer> foo(Set<CharSequence> m) { … }

public ArrayList<Number> foo(Set<CharSequence> m) { … }

public List<Integer> foo(TreeSet<String> m) { … }

public List<Integer> foo(Set<String> m) { … }

public List<Object> foo(Set<CharSequence> m) { … }

public ArrayList<Integer> foo(Set<String> m) { … }

QUESTION 67
Given:

Which two are correct? (Choose two.)

Option A

Option B

Option C

Option D

QUESTION 68
Given:

What is the result?

The compilation fails at line 9.

The compilation fails at line 2.

Hello World

The compilation fails at line 8.

QUESTION 69
Given:

What is the output?

null

A NoSuchElementException is thrown at run time.

Duke

A NullPointerException is thrown at run time.

QUESTION 70
Given
:

What is the correct definition of the JsonField annotation that makes the Point class compile?
A)

B)

C)

Option A

Option B

Option C

QUESTION 71
Given the code fragment:

Which can replace line 11?

UnaryOperator<Interger > uo = (var x ) -> (x * 3);

UnaryOperator<Interger >uo = var x -> { return x 3 ; };

UnaryOperator<Interger >uo = x -> { return x * 3; };

UnaryOperator<Interger >uo = (int x) -> x * 3;

QUESTION 72
Given the code fragment:

What is the result?

ab cd ef

An ArrayIndexOutOfBoundsException is thrown at runtime.

The compilation fails.

abc def

ad be cf

QUESTION 73
Given the code fragment:

Which “for” loop produces the same output?

Option A

Option B

Option C

Option D

QUESTION 74
Given the code fragment:

What is the result?

13 5 7 9

1 3 5 7 9 11

2 4 6 B 10

2 4 6 8

QUESTION 75
Given:

What action ensures successful compilation?

Replace public Color(int c) with private Color(int c).

Replace int c; with private int c;.

Replace int c; with private final int c;.

Replace enum Color implements Serializable with public enum Color.

Replace enum Color with public enum Color.

QUESTION 76
Given:

What is the result?

An exception is thrown at runtime.

QUESTION 77
Given the code fragment:

What change on line 1 will make this code compile?

Add catch (L |N e).

Add catch (L |M N e).

Add catch (L e).

Add catch (N | L | M e).

Add catch (M |L e).

QUESTION 78
Given:

What code inserted into class C would allow it to compile?

public void x() { }
public void z() { }

public void x() { }
protected void y() { super.y(); }
public void z() { }

void x() { }
public void y() { }
public void z() { }

void x() { super.y(); }
public void z() { }

void x() { }
public void z() { }

QUESTION 79
Given the content:

What Is the result?
A)

B)

C)

D)

E)
User Username

Option A

Option B

Option C

Option D

Option

QUESTION 80
Given:

and

Which code fragment on line 1 makes the s1 set contain the names of all employees born before January 1,
1989?

Option A

Option B

Option C

Option D

QUESTION 81
Given:

And the command:
java Main Helloworld
What is the result ?

Input: Echo:

Input: Helloworld Echo: Helloworld

Input:
Then block until any input comes from System.in.

Input:
Echo: Helloworld

A NullPointerException is thrown at run time.

QUESTION 82
Given this enum declaration:

Examine this code:
System.out.println(Letter.values()[1]);
What code should be written at line 5 for this code to print 200?

public String toString() { return String.valueOf(ALPHA.v); }

public String toString() { return String.valueOf(Letter.values()[1]); }

public String toString() { return String.valueOf(v); }

String toString() { return “200”; }

QUESTION 83
Given the contents:
MessageBundle.properties file:
message=Hello
MessageBundle_en.properties file:
message=Hello (en)
MessageBundle_US.properties file:
message=Hello (US)
MessageBundle_en_US.properties file:
message=Hello (en_US)
MessageBundle_fr_FR.properties file:
message=Bonjour
and the code fragment:
Locale.setDefault(Locale.FRANCE);
Locale currentLocale = new Locale.Builder().setLanguage(“en”).build();
ResourceBundle messages = ResourceBundle.getBundle(“MessageBundle”, currentLocale); System.out. println(messages.getString(“message”)); Which file will display the content on executing the code fragment?