Oracle Oracle Java 1Z0-816 Questions & Answers

• Question 1:

  Given:

  List longlist = List.of("Hello","World","Beat"); List shortlist = new ArrayList<>();

  Which code fragment correctly forms a short list of words containing the letter "e"?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

• Question 2:

  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 APIs. If any are found, the suggested replacements are output in the console.

  B. jdeps outputs an error message that the -jdkinternals option requires either the -summary or the verbose options to output to the console.

  C. The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.

  D. The -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.

  Correct Answer: A

  -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.

• Question 3:

  Given: Which annotation should be used to remove warnings from compilation?

  

  A. @SuppressWarnings on the main and print methods

  B. @SuppressWarnings("unchecked") on main and @SafeVarargs on the print method

  C. @SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method

  D. @SuppressWarnings("all") on the main and print methods

  Correct Answer: B

  

• Question 4:

  

  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"; }

  Correct Answer: C

  

• Question 5:

  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.

  Correct Answer: C

• Question 6:

  Which two statements independently compile? (Choose two.)

  A. List list = new ArrayList();

  B. List list = new ArrayList();

  C. List list = new ArrayList();

  D. List list = new ArrayList