The Realest Study Materials 1z1-819 Dumps Updated Nov 09, 2022 [Q68-Q92]

The Realest Study Materials 1z1-819 Dumps  Updated  Nov 09, 2022

LATEST 1z1-819 Exam Practice Material

Exam Topic for Java SE 11 Developer Exam Number: 1Z0-819

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

• Java I/O API
• Working with Java data types
• Annotations
• Java Object-Oriented Approach
• Working with Arrays and Collections

 

NEW QUESTION 68
Given:

If file "App.config" is not found, what is the result?

• A. Exception in thread "main" java.lang.Error:Fatal Error: Configuration File, App.config, is missing.
• B. Configuration is OK
• C. The compilation fails.
• D. nothing

Answer: C

Explanation:

 

NEW QUESTION 69
Which three initialization statements are correct? (Choose three.)

• A. int x = 12_34;
• B. boolean false = (4 != 4);
• C. short sh = (short)'A';
• D. float x = 1f;
• E. byte b = 10;
  char c = b;
• F. String contact# = "(+2) (999) (232)";
• G. int[][][] e = {{1,1,1},{2,2,2}};

Answer: A,C,D

 

NEW QUESTION 70
Given:

What is the result?

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

Answer: C

Explanation:

 

NEW QUESTION 71
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_fr_FR.properties
• C. MessageBundle.properties
• D. MessageBundle_en_US.properties
• E. MessageBundle_US.properties

Answer: B

 

NEW QUESTION 72
Given:

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

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

Answer: C,D

 

NEW QUESTION 73
Given:

What is the type of the local variable x?

• A. char
• B. String
• C. Character
• D. String[ ]

Answer: B

 

NEW QUESTION 74
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

• A. An implementation of country.countryDetails can be added to the main module.
• B. 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.
• C. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
• D. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
• E. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.

Answer: B,E

Explanation:
Reference:
/java-9-error-not-in-a-module-on-the-module-source- path

 

NEW QUESTION 75
Given:

What is the result?

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

Answer: D

 

NEW QUESTION 76
Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?

• A. [Market Road, 1000]
• B. An exception is thrown at run time.
• C. [Peter, 25, null, 1000]
• D. [Peter, 30, Market Road]

Answer: B

Explanation:

 

NEW QUESTION 77
Given this enum declaration:

Examine this code:
System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?

• A. String getFirstLetter() { return A.toString(); }
• B. static String getFirstLetter() { return Alphabet.values()[1].toString(); }
• C. static String getFirstLetter() { return A.toString(); }
• D. final String getFirstLetter() { return A.toString(); }

Answer: C

 

NEW QUESTION 78
Given the code fragment:

Which code fragment replaces the for statement?

• A. IntStream.range(1, 100).mapToObj(FizzBuzz::convert).forEach(System.out::println);
• B. IntStream.rangeClosed(l, 100).map(FizzBuzz::convert).forEach(System.out::println);
• C. intstream.rangeclosed(l, 100).mapToObj{FizzBuzz::convert).forEach(System.out::printIn);
• D. IntStream.ranged, 100).map(FizzBuzz::convert).forEach(System.out::println);

Answer: B

 

NEW QUESTION 79
Given:

It is required that if p instanceof Pair then p.isValid() returns true.
Which is the smallest set of visibility changes to insure this requirement is met?

• A. setLeft and setRight must be protected.
• B. left, right, setLeft, and setRight must be private.
• C. isValid must be public.
• D. left and right must be private.

Answer: D

 

NEW QUESTION 80
Given:
/code/a/Test.java
containing:

and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?

• A. java -cp /code a.Test
• B. javac -d /code /code/a/Test.java /code/b/Best.java
• C. java /code/a/Test.java /code/b/Best.java
• D. java /code/a/Test.java
• E. javac -d /code /code/a/Test.java
• F. javac -d /code /code/a/Test

Answer: B

 

NEW QUESTION 81
Given:

This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?

• A. Consumer consumer = var arg -> {System.out.print(arg);};
• B. Consumer consumer = System.out::print;
• C. Consumer consumer = (String args) -> System.out.print(args);
• D. Consumer consumer = msg -> { return System.out.print(msg); };

Answer: B

Explanation:

 

NEW QUESTION 82
Which two statements correctly describe capabilities of interfaces and abstract classes? (Choose two.)

• A. Interfaces cannot have instance fields but abstract classes can.
• B. Interfaces cannot have protected methods but abstract classes can.
• C. Interfaces cannot have methods with bodies but abstract classes can.
• D. Both interfaces and abstract classes can have final methods.
• E. Interfaces cannot have static methods but abstract classes can.

Answer: A,B

 

NEW QUESTION 83
Given:

You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?

• A. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
• B. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
• C. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
• D. Stream<String> lines = Files.lines(INPUT_FILE_NAME);

Answer: B

 

NEW QUESTION 84
Given:

Which two method implementations are correct, when inserted independently in line 1? (Choose two.)

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

Answer: C,E

 

NEW QUESTION 85
Given:

This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?

• A. Consumer consumer = (String args) > System.out.print(args);
• B. Consumer consumer = System.out::print;
• C. Consumer consumer = msg -> { return System.out.print(msg); };
• D. Consumer consumer = var arg > {System.out.print(arg);};

Answer: B

Explanation:

 

NEW QUESTION 86
Given:

What is the result?

• A. An exception is thrown at runtime
• B. Take extra care
• C. The program prints nothing.
• D. Take extra care
  Take extra care

Answer: A

 

NEW QUESTION 87
Given the code fragment:

Which code fragment replaces the for statement?

• A. IntStream.range(1, 100).mapToObj(FizzBuzz::convert).forEach(System.out::println);
• B. IntStream.rangeClosed(l, 100).map(FizzBuzz::convert).forEach(System.out::println);
• C. intstream.rangeclosed(l, 100).mapToObj{FizzBuzz::convert).forEach(System.out::printIn);
• D. IntStream.ranged, 100).map(FizzBuzz::convert).forEach(System.out::println);

Answer: B

 

NEW QUESTION 88
Given:

What is the output?

• A. Hello world!Hello world!
• B. Hello world!Bonjour le monde!
• C. Bonjour le monde!Bonjour le monde!
• D. Bonjour le monde!Hello world!

Answer: D

Explanation:

 

NEW QUESTION 89
Given:

Which two are correct? (Choose two.)

• A. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5, but the order is unpredictable.
• B. The program prints 1 4 2 3, but the order is unpredictable.
• C. The output will be exactly 2 1 3 4 5.
• D. Replacing forEach() with forEachOrdered(), the program prints 1 2 3 4 5.
• E. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5.

Answer: B,D

Explanation:

 

NEW QUESTION 90
Which command line runs the main class com.acme.Main from the module com.example?

• A. java -classpath com.example.jar -m com.example/com.acme.Main
• B. java --module-path mods -m com.example/com.acme.Main
• C. java --module-path mods com.example/com.acme.Main
• D. java -classpath com.example.jar com.acme.Main

Answer: A

 

NEW QUESTION 91
Given:

What is the result?

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

Answer: G

Explanation:

 

NEW QUESTION 92
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