Up To The Minute 1Z0-819 Preparation Labs For Java SE 11 Developer Certification

NEW QUESTION 1
Given:

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

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

Answer: AE

NEW QUESTION 2
Given:

Which two allow a.Main to allocate a new Person? (Choose two.)

• A. In Line 1, change the access modifier to privateprivate Person() {
• B. In Line 1, change the access modifier to publicpublic Person() {
• C. In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();
• D. In Line 2, change the access modifier to protectedprotected class Main {
• E. In Line 1, remove the access modifierPerson() {

Answer: BC

NEW QUESTION 3
Given:

Which statement on line 1 enables this code fragment to compile?

• A. Function function = String::toUpperCase;
• B. UnaryOperator function = s > s.toUpperCase();
• C. UnaryOperator<String> function = String::toUpperCase;
• D. Function<String> function = m > m.toUpperCase();

Answer: C

Explanation:

NEW QUESTION 4
Which three annotation uses are valid? (Choose three.)

• A. Function<String, String> func = (@NonNull x) > x.toUpperCase();
• B. var v = “Hello” + (@Interned) “World”
• C. Function<String, String> func = (var @NonNull x) > x.toUpperCase();
• D. Function<String, String> func = (@NonNull var x) > x.toUpperCase();
• E. var myString = (@NonNull String) str;
• F. var obj = new @Interned MyObject();

Answer: ACF

NEW QUESTION 5
Given:

What is the result?

• A. 9
• B. An exception is thrown at runtime.
• C. 3
• D. 6

Answer: D

Explanation:

NEW QUESTION 6
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 7
Which describes a characteristic of setting up the Java development environment?

• A. Setting up the Java development environment requires that you also install the JRE.
• B. The Java development environment is set up for all operating systems by default.
• C. You set up the Java development environment for a specific operating system when you install the JDK.
• D. Setting up the Java development environment occurs when you install an IDE before the JDK.

Answer: D

NEW QUESTION 8
Given:

What is the output?

• A. 300
• B. Exception
• C. 200
• D. 100

Answer: A

Explanation:

NEW QUESTION 9
Which three initialization statements are correct? (Choose three.)

• A. int x = 12_34;
• B. short sh = (short)‘A’;
• C. String contact# = “(+2) (999) (232)”;
• D. boolean true = (4 == 4);
• E. float x = 1.99;
• F. int[][] e = {{1,1},{2,2}};
• G. byte b = 10;char c = b;

Answer: ABF

NEW QUESTION 10
Which three guidelines are used to protect confidential information? (Choose three.)

• A. Limit access to objects holding confidential information.
• B. Clearly identify and label confidential information.
• C. Manage confidential and other information uniformly.
• D. Transparently handle information to improve diagnostics.
• E. Treat user input as normal information.
• F. Validate input before storing confidential information.
• G. Encapsulate confidential information.

Answer: ADF

NEW QUESTION 11
Given:

What is the result?

• A. WorkingUnknown
• B. Unknown
• C. TuesdayUnknown
• D. The compilation fails.
• E. Tuesday
• F. Working

Answer: B

Explanation:

NEW QUESTION 12
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

• 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.

Answer: BD

NEW QUESTION 13
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 14
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 15
Which code fragment does a service use to load the service provider with a Print interface?

• A. private Print print = com.service.Provider.getInstance();
• B. private java.util.ServiceLoader<Print> loader = ServiceLoader.load (Print.class);
• C. private java.util.ServiceLoader<Print> loader = new java.util.ServiceLoader<> ();
• D. private Print print = new com.service.Provider.PrintImpl();

Answer: B

NEW QUESTION 16
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. An application must be structured as modules in order to run on the modular JDK.
• C. It is possible but undesirable to configure modules’ exports from the command line.
• D. APIs are deprecated more aggressively because the JDK has been modularized.

Answer: AC

NEW QUESTION 17
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