Top Tips Of Down To Date 1Z0-819 Braindump

NEW QUESTION 1
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 2
Given:

executed using command:
java Hello “Hello World” Hello World What is the output?

• A. An exception is thrown at runtime.
• B. Hello WorldHello World
• C. Hello World Hello World
• D. Hello WorldHelloWorld
• E. HelloHello WorldHelloWorld

Answer: C

NEW QUESTION 3
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 4
Given:

What is the result?

• A. null
• B. nothing
• C. It fails to compile.
• D. java.lang.IllegalAccessException is thrown.
• E. Student

Answer: C

NEW QUESTION 5
Given:

Assume the file on path does not exist. What is the result?

• A. The compilation fails.
• B. /u01/work/filestore.txt is not deleted.
• C. Exception
• D. /u01/work/filestore.txt is deleted.

Answer: A

Explanation:

NEW QUESTION 6
Given:

Which two constructors will compile and set the class field strings? (Choose two.)

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

Answer: CE

NEW QUESTION 7
Given:
jdeps -jdkinternals C:\workspace4\SimpleSecurity\jar\classes.jar
Which describes the expected output?

• A. jdeps lists the module dependencies and the package names of all referenced JDK internal API
• B. If any are found, the suggested replacements are output in the console.
• C. jdeps outputs an error message that the -jdkinternals option requires either the -summary or the - verbose options to output to the console.
• D. The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.
• E. The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal API
• F. If any are found, the results with suggested replacements are output in the console.

Answer: A

Explanation:
-jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.

NEW QUESTION 8
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 9
Given:

executed with this command: java Main one two three
What is the output of this class?

• A. The compilation fails.
• B. 1) one2) two3) three
• C. A java.lang.ArrayIndexOutOfBoundsException is thrown.
• D. 1) one
• E. nothing

Answer: B

NEW QUESTION 10
Given:

What is the output?

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

Answer: A

Explanation:

NEW QUESTION 11
Given the formula to calculate a monthly mortgage payment:

and these declarations:

How can you code the formula?

• A. m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) - 1));
• B. m = p * ((r * Math.pow(1 + r, n) / (Math.pow(1 + r, n)) - 1));
• C. m = p * r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1;
• D. m = p * (r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1);

Answer: A

NEW QUESTION 12
Given:

What is required to make the Foo class thread safe?

• A. No change is required.
• B. Make the declaration of lock static.
• C. Replace the lock constructor call with new ReentrantLock (true).
• D. Move the declaration of lock inside the foo method.

Answer: C

NEW QUESTION 13
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 14
Analyze the code:

Which two options can you insert inside println method to produce Global:namescope? (Choose two.)

• A. Test.prefix+Test.name
• B. new Test().prefix+new Test().name
• C. Test.prefix+Test.getName()
• D. Test.getName+prefix
• E. prefix+Test.name
• F. prefix+name

Answer: BC

NEW QUESTION 15
Given:

Which statement is true?

• A. Class Tester does not need to import java.time.LocalDate because it is already visible to members of the package test.
• B. All classes from the package java.tim
• C. are loaded for the class Diary.
• D. Only LocalDate class from java.time package is loaded.
• E. Tester must import java.time.LocalDate in order to compile.

Answer: A

NEW QUESTION 16
Examine this excerpt from the declaration of the java.se module:

What does the transitive modifier mean?

• A. Only a module that requires the java.se module is permitted to require the java.sql module.
• B. Any module that requires the java.se module does not need to require the java.sql module.
• C. Any module that attempts to require the java.se module actually requires the java.sql module instead.
• D. Any module that requires the java.sql module does not need to require the java.se module.

Answer: A

NEW QUESTION 17
Given:

What is the result?

• A. nothing
• B. It fails to compile.
• C. A java.lang.IllegalArgumentException is thrown.
• D. 10

Answer: B

Explanation:

NEW QUESTION 18
Which command line runs the main class com.acme.Main from the module com.example?

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

Answer: D

NEW QUESTION 19
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 20
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