How Many Questions Of 1Z0-819 Study Guides

NEW QUESTION 1
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 2
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_US.properties
• B. MessageBundle_en.properties
• C. MessageBundle_fr_FR.properties
• D. MessageBundle_US.properties
• E. MessageBundle.properties

Answer: C

NEW QUESTION 3
Given:

What is the output?

• A. :APPLE:ORANGE:BANANAappleorangebanana
• B. :APPLE:ORANGE:BANANA
• C. APPLE:apple ORANGE:orange BANANA:banana
• D. appleorangebanana:APPLE:ORANGE:BANANA
• E. apple:APPLE orange:ORANGE banana:BANANA

Answer: E

Explanation:

NEW QUESTION 4
Given:

What is the result?

• A. JoeMarry
• B. Joenull
• C. nullnull
• D. nullMary

Answer: D

Explanation:

NEW QUESTION 5
Given:

Which two changes need to be made to make this class compile? (Choose two.)

• A. Change Line 1 to an abstract class:public abstract class API {
• B. Change Line 2 access modifier to protected:protected void checkValue(Object value)throws IllegalArgumentException;
• C. Change Line 1 to a class:public class API {
• D. Change Line 1 to extend java.lang.AutoCloseable:public interface API extends AutoCloseable {
• E. Change Line 2 to an abstract method:public abstract void checkValue(Object value)throws IllegalArgumentException;

Answer: CE

NEW QUESTION 6
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?

• A. public String toString() { return String.valueOf(ALPHA.v); }
• B. public String toString() { return String.valueOf(Letter.values()[1]); }
• C. public String toString() { return String.valueOf(v); }
• D. String toString() { return “200”; }

Answer: C

Explanation:

NEW QUESTION 7
Which two are functional interfaces? (Choose two.)

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

Answer: CE

NEW QUESTION 8
Given:

What is the result?

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

Answer: D

Explanation:

NEW QUESTION 9
Which two commands are used to identify class and module dependencies? (Choose two.)

• A. jmod describe
• B. java Hello.java
• C. jdeps --list-deps
• D. jar --show-module-resolution
• E. java --show-module-resolution

Answer: CE

NEW QUESTION 10
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. [Peter, 30, Market Road]
• C. [Peter, 25, null, 1000]
• D. An exception is thrown at run time.

Answer: D

Explanation:

NEW QUESTION 11
Given:

What is the output?

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

Answer: A

Explanation:

NEW QUESTION 12
You are working on a functional bug in a tool used by your development organization. In your investigation, you find that the tool is executed with a security policy file containing this grant.

What action should you take?

• A. Nothing, because it is an internal tool and not exposed to the public.
• B. Remove the grant because it is excessive.
• C. Nothing, because it is not related to the bug you are investigating.
• D. File a security bug against the tool referencing the excessive permission granted.
• E. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.

Answer: D

NEW QUESTION 13
Given:

What is the result?

• A. 5
• B. 3
• C. 23
• D. 25
• E. 11

Answer: E

NEW QUESTION 14
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 15
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 16
Which statement about access modifiers is correct?

• A. An instance variable can be declared with the static modifier.
• B. A local variable can be declared with the final modifier.
• C. An abstract method can be declared with the private modifier.
• D. An inner class cannot be declared with the public modifier.
• E. An interface can be declared with the protected modifier.

Answer: B

NEW QUESTION 17
Given:

What is the result?

• A. watermelonorangelemongrapeapricotapple
• B. nothing
• C. appleapricotgrapelemonorangewatermelon
• D. appleorangegrapelemonapricotwatermelon

Answer: A

Explanation:

NEW QUESTION 18
Given:

After which line can we insert assert i < 0 || values[i] <= values[i + 1]; to verify that the values array is partially sorted?

• A. after line 8
• B. after line 6
• C. after line 5
• D. after line 10

Answer: B

Explanation:

NEW QUESTION 19
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