2021 1Z0-819 Premium Files Test pdf - Free Dumps Collection [Q54-Q71]

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2021 1Z0-819 Premium Files Test pdf - Free Dumps Collection

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NEW QUESTION 54
Given:

Which three are correct? (Choose three.)

  • A. f1.foo(li) prints Hola Mundo!
  • B. b1.foo(li) prints Bonjour le monde!
  • C. f1.foo(li) prints Hello world!
  • D. f2.foo(li) prints Hello world!
  • E. f1.foo(li) prints Bonjour le monde!
  • F. f2.foo(li) prints Hola Mundo!
  • G. f2.foo(li) prints Bonjour le monde!
  • H. b1.foo(li) prints Hola Mundo!
  • I. b1.foo(li) prints Hello world!

Answer: E,H,I

 

NEW QUESTION 55
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?

  • A. Option D
  • B. Option C
  • C. Option A
  • D. Option B

Answer: B

 

NEW QUESTION 56
And the code fragment:

Which situation will occur on code fragment execution?

  • A. Starvation
  • B. Livelock
  • C. Race Condition
  • D. Deadlock

Answer: A

 

NEW QUESTION 57
Given:

Which two lines can replace line 1 so that the Y class compiles? (Choose two.)

  • A. super.set(List<String> map)
  • B. map.forEach((k, v) -> set(v)));
  • C. set(map)
  • D. super.set(map.values());
  • E. set(map.values());

Answer: D,E

 

NEW QUESTION 58
Given:

What is the result?

  • A. The compilation fails due to an error in line 3.
  • B. The compilation fails due to an error in line 2.
  • C. The compilation fails due to an error in line 5.
  • D. The compilation fails due to an error in line 1.
  • E. 0
  • F. The compilation fails due to an error in line 4.
  • G. 1

Answer: G

 

NEW QUESTION 59
Given:

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

  • A. Option F
  • B. Option A
  • C. Option C
  • D. Option D
  • E. Option B
  • F. Option E

Answer: B,C,D

 

NEW QUESTION 60
Given the code fragment:

What is the result?
A)

B)

C)

D)

  • A. Option D
  • B. Option C
  • C. Option A
  • D. Option B

Answer: B

 

NEW QUESTION 61
Given the code fragment:

What is the result?

  • A. The compilation fails.
  • B. abc def
  • C. ab cd ef
  • D. ad be cf
  • E. An ArrayIndexOutOfBoundsException is thrown at runtime.

Answer: D

 

NEW QUESTION 62
Given:

What is the result?

  • A. 0
  • B. 1
  • C. The compilation fails due to an error in line 1.
  • D. 2
  • E. b1
  • F. b2
  • G. b3

Answer: D

Explanation:

 

NEW QUESTION 63
Given:

What is the result?

  • A. 6=(x+y)=42
  • B. 6=(x+y)=6
  • C. An exception is thrown at runtime.
  • D. 42=(x+y)=6
  • E. 42=(x+y)=42

Answer: A

Explanation:

 

NEW QUESTION 64
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?

  • A. MessageBundle_en.properties
  • B. MessageBundle.properties
  • C. MessageBundle_fr_FR.properties
  • D. MessageBundle_US.properties
  • E. MessageBundle_en_US.properties

Answer: C

 

NEW QUESTION 65
Given:

Which two interfaces can be used in lambda expressions? (Choose two.)

  • A. MyInterface3
  • B. MyInterface5
  • C. MyInterface2
  • D. MyInterface4
  • E. MyInterface1

Answer: B,C

 

NEW QUESTION 66
Given:

and

Which four identifiers from the Fooand Barclasses are visible at line 1? (Choose four.)

  • A. j
  • B. i
  • C. c
  • D. A
  • E. e
  • F. h
  • G. g
  • H. d
  • I. f
  • J. B

Answer: C,D,G,J

 

NEW QUESTION 67
Which two statements are true about the modular JDK? (Choose two.)

  • A. The foundational APIs of the Java SE Platform are found in the java.base module.
  • B. It is possible but undesirable to configure modules' exports from the command line.
  • C. An application must be structured as modules in order to run on the modular JDK.
  • D. APIs are deprecated more aggressively because the JDK has been modularized.

Answer: A,B

 

NEW QUESTION 68
Given:

What is the result?

  • A. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet
  • B. java.lang.ArrayIndexOutOfBoundsException thrown
  • C. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
  • D. [0,0] = Red[1,0] = Black[2,0] = Blue

Answer: A

Explanation:

 

NEW QUESTION 69
Given
:

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

B)

C)

  • A. Option A
  • B. Option B
  • C. Option C

Answer: A

 

NEW QUESTION 70
Given:

Which two lines inserted in line 1 will allow this code to compile? (Choose two.)

  • A. abstract void walk();
  • B. public abstract void walk();
  • C. private void walk(){}
  • D. void walk(){}
  • E. protected void walk(){}

Answer: B,E

 

NEW QUESTION 71
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