Replace Java SE 11 Developer 1Z0-819 Training Materials

NEW QUESTION 1
Given:

Which three are correct? (Choose three.)

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

Answer: ABH

NEW QUESTION 2
var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

• A. double avg = numbers.stream().parallel().averagingDouble(a > a);
• B. double avg = numbers.parallelStream().mapToInt (m > m).average().getAsDouble ();
• C. double avg = numbers.stream().mapToInt (i > i).average().parallel();
• D. double avg = numbers.stream().average().getAsDouble();
• E. double avg = numbers.stream().collect(Collectors.averagingDouble(n > n));

Answer: BD

Explanation:

NEW QUESTION 3
Assuming the Widget class has a getPrice method, this code does not compile:

Which two statements, independently, would allow this code to compile? (Choose two.)

• A. Replace line 5 with widgetStream.filter(a > ((Widget)a).getPrice() > 20.00).
• B. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
• C. Replace line 5 with widgetStream.filter((Widget a) > a.getPrice() > 20.00).
• D. Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.

Answer: AD

NEW QUESTION 4
Given:
String originalPath = “data\\projects\\a-project\\..\\..\\another-project”; Path path = Paths.get(originalPath); System.out.print(path.normalize());
What is the result?

• A. data\another-project
• B. data\projects\a-project\another-project
• C. data\\projects\\a-project\\..\\..\\another-project
• D. data\projects\a-project\..\..\another-project

Answer: D

Explanation:

NEW QUESTION 5
Given the code fragment:

Which “for” loop produces the same output?

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

Answer: C

NEW QUESTION 6
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 A
• B. Option B
• C. Option C
• D. Option D

Answer: C

NEW QUESTION 7
Given:

Which two lines cause compilation errors? (Choose two.)

• A. line 12
• B. line 6
• C. line 9
• D. line 8
• E. line 7

Answer: BE

NEW QUESTION 8
What makes Java dynamic?

• 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.

Answer: A

NEW QUESTION 9
Given:

What is the expected result of javac?

• A. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: packagejava does not exist
• B. javac compiles Mycar.java without errors or warnings.
• C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang
• D. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class

Answer: B

NEW QUESTION 10
Given:

What is the result?

• A. The compilation fails at line 9.
• B. The compilation fails at line 2.
• C. Hello World
• D. The compilation fails at line 8.

Answer: C

Explanation:

NEW QUESTION 11
Given:
LocalDate d1 = LocalDate.of(1997,2,7); DateTimeFormatter dtf = DateTimeFormatter.ofPattern( /*insert code here*/ ); System.out.println(dtf.format (d1));
Which pattern formats the date as Friday 7th of February 1997?

• A. “eeee dd+”th of”+ MMM yyyy”
• B. “eeee dd'th of' MMM yyyy”
• C. “eeee d+”th of”+ MMMM yyyy”
• D. “eeee d’th of’ MMMM yyyy”

Answer: B

NEW QUESTION 12
Given the code fragment:
Path source = Paths.get(“/repo/a/a.txt”); Path destination = Paths.get(“/repo”); Files.move(source, destination); // line 1 Files.delete (source); // line 2
Assuming the source file and destination folder exist, what Is the result?

• A. A java.nio.file.FileAlreadyExistsException is thrown on line 1.
• B. A java.nio.file.NoSuchFileException is thrown on line 2.
• C. A copy of /repo/a/a.txt is moved to the /repo directory and /repo/a/a.txt is deleted.
• D. a.txt is renamed repo.

Answer: C

NEW QUESTION 13
Which two describe reasons to modularize the JDK? (Choose two.)

• A. easier to understand the Java language
• B. improves security and maintainability
• C. easier to expose implementation details
• D. improves application robustness
• E. easier to build a custom runtime linking application modules and JDK modules

Answer: BD

NEW QUESTION 14
Given:

You want the code to produce this output:
John
Joe Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?

• A. Insert Comparator<Person> on line 1.Insertpublic int compare(Person p1, Person p2) { return p1.name.compare(p2.name);}on line 2.
• B. Insert Comparator<Person> on line 1.Insertpublic int compareTo(Person person) { return person.name.compareTo(this.name);}on line 2.
• C. Insert Comparable<Person> on line 1.Insertpublic int compare(Person p1, Person p2) { return p1.name.compare(p2.name);}on line 2.
• D. Insert Comparator<Person> on line 1.Insertpublic int compare(Person person) { return person.name.compare(this.name);}on line 2.

Answer: B

NEW QUESTION 15
Given:

and

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

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

Answer: B

NEW QUESTION 16
Given:

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

• 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.

Answer: D

Explanation:

NEW QUESTION 17
Given:

Why does D cause a compilation error?

• A. D inherits a() only from C.
• B. D inherits a() from B and C but the return types are incompatible.
• C. D extends more than one interface.
• D. D does not define any method.

Answer: B

NEW QUESTION 18
Given: Automobile.java

Car.java

What must you do so that the code prints 4?

• A. Remove the parameter from wheels method in line 3.
• B. Add @Override annotation in line 2.
• C. Replace the code in line 2 with Car ob = new Car();
• D. Remove abstract keyword in line 1.

Answer: B

Explanation:

NEW QUESTION 19
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