Oracle Oracle Certifications 1Z0-819 Questions & Answers

• Question 201:

  Given:

  

  What is the result?

  A. Good Morning, Potter

  B. Good Night, Potter

  C. Good Morning, Harry

  D. Good Night, Harry

  Correct Answer: B

  

• Question 202:

  Given: Automobile.java

  

  Car.java

  

  What must you do so that the code prints 4?

  A. Remove the parameter from wheels method in line 3.

  B. Add @Override annotation in line 2.

  C. Replace the code in line 2 with Car ob = new Car();

  D. Remove abstract keyword in line 1.

  Correct Answer: A

• Question 203:

  Given: What is the result?

  

  A. nothing

  B. It fails to compile.

  C. 0

  D. A java.lang.IllegalArgumentException is thrown.

  E. 10

  Correct Answer: B

• Question 204:

  Given:

  

  And the command: java Main Helloworld What is the result ?

  A. Input: Echo:

  B. Input: Helloworld Echo: Helloworld

  C. Input: Then block until any input comes from System.in.

  D. Input: Echo: Helloworld

  E. A NullPointerException is thrown at run time.

  Correct Answer: C

  

• Question 205:

  Which two modules include APIs in the Java SE Specification? (Choose two.)

  A. java.logging

  B. java.desktop

  C. javafx

  D. jdk.httpserver

  E. jdk.jartool

  Correct Answer: AD

  Reference: https://docs.oracle.com/javase/9/docs/api/overview-summary.html

• Question 206:

  Given:

  

  Which two independent changes will make the Main class compile? (Choose two.)

  A. Move the entire Student class declaration to a separate Java file, Student.java.

  B. Change line 2 to public Student(String classname).

  C. Change line 1 to public class Student {.

  D. Change line 3 to Student student = new Student("Biology");.

  E. Change line 1 to static class Student {.

  Correct Answer: BD

  

• Question 207:

  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 208:

  Given:

  

  Why does D cause a compilation error?

  A. D inherits a() only from C.

  B. D inherits a() from B and C but the return types are incompatible.

  C. D extends more than one interface.

  D. D does not define any method.

  Correct Answer: B

• Question 209:

  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.

  Correct Answer: BD

  Reference: https://stackoverflow.com/

• Question 210:

  Which is the correct order of possible statements in the structure of a Java class file?

  A. class, package, import

  B. package, import, class

  C. import, package, class

  D. package, class, import

  E. import, class, package

  Correct Answer: B