Oracle Oracle Certifications 1Z0-816 Questions & Answers

• Question 71:

  Which code fragment compiles?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: D

  

• Question 72:

  Given these two classes:

  

  And given this fragment: Which describes the fragment?

  

  A. It throws IllegalMonitorStateException.

  B. It is subject to deadlock.

  C. It is subject to livelock.

  D. The code does not compile.

  Correct Answer: D

• Question 73:

  Given:

  

  Examine these requirements:

  Eliminate code duplication.

  Keep constant the number of methods other classes may implement from this interface.

  Which method can be added to meet these requirements?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B

• Question 74:

  Given: Which one is correct?

  

  A. An IllegalThreadStateException is thrown at run time.

  B. Three threads are created.

  C. The compilation fails.

  D. Four threads are created.

  Correct Answer: A

  

• Question 75:

  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 loader = ServiceLoader.load(Print.class);

  C. private java.util.ServiceLoader loader = new java.util.ServiceLoader<>();

  D. private Print print = new com.service.Provider.PrintImpl();

  Correct Answer: B

  Reference: https://docs.oracle.com/javase/8/docs/api/?java/util/ServiceLoader.html

• Question 76:

  Given:

  

  Which two interfaces can be used in lambda expressions? (Choose two.)

  A. MyInterface1

  B. MyInterface3

  C. MyInterface5

  D. MyInterface2

  E. MyInterface4

  Correct Answer: CD

  Reference: https://dzone.com/articles/functional-interface-and-lambda-expression

• Question 77:

  Given this enum declaration:

  

  Examine this code:

  System.out.println(Alphabet.getFirstLetter());

  What code should be written at line 3 to make this code print A?

  A. final String getFirstLetter() { return A.toString(); }

  B. static String getFirstLetter() { return Alphabet.values()[1].toString(); }

  C. static String getFirstLetter() { return A.toString(); }

  D. String getFirstLetter() { return A.toString(); }

  Correct Answer: C

• Question 78:

  Given the code fragment:

  Path currentFile = Paths.get("/scratch/exam/temp.txt"); Path outputFile = Paths get("/scratch/exam/new.txt"); Path directory = Paths.get("/scratch/");

  Files.copy(currentFile, outputFile); Files.copy(outputFile, directory); Files.delete (outputFile);

  The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.

  What is the result?

  A. /scratch/exam/new.txt and /scratch/new.txt are deleted.

  B. The program throws a FileaAlreadyExistsException.

  C. The program throws a NoSuchFileException.

  D. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.

  Correct Answer: C

  Expalanation:

  

• Question 79:

  Which two are functional interfaces? (Choose two.)

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  Correct Answer: CE

  Reference: http://tutorials.jenkov.com/java-functional-programming/functional-interfaces.html

• Question 80:

  Given the declaration:

  

  Examine this code fragment:

  /* Loc1 */ class ProcessOrders { ... }

  Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)

  A. @Resource(priority=100)

  B. @Resource(priority=0)

  C. @Resource(name="Customer1", priority=100)

  D. @Resource(name="Customer1")

  E. @Resource

  Correct Answer: AB