Oracle Oracle Certifications 1Z0-815 Questions & Answers

• Question 1:

  What makes Java dynamic?

  A. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.

  B. The runtime can process machine language sources as well as executables from different language compilers.

  C. The Java compiler uses reflection to test if class methods are supported by resources of a target platform.

  D. The Java compiler preprocesses classes to run on specific target platforms.

  Correct Answer: A

• Question 2:

  Given:

  

  Which three are correct? (Choose three.)

  A. b1.foo(li) prints Hello world!

  B. f1.foo(li) prints Bonjour le monde!

  C. f1.foo(li) prints Hello world!

  D. f1.foo(li) prints Hola Mundo!

  E. b1.foo(li) prints Bonjour le monde!

  F. f2.foo(li) prints Hola Mundo!

  G. f2.foo(li) prints Bonjour le monde!

  H. b1.foo(li) prints Hola Mundo!

  I. f2.foo(li) prints Hello world!

  Correct Answer: ABH

• Question 3:

  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: B

  

• Question 4:

  Given: /code/a/Test.java containing:

  

  and

  /code/b/Best.java

  containing:

  package b;

  public class Best { }

  Which is the valid way to generate bytecode for all classes?

  A. java /code/a/Test.java

  B. javac –d /code /code/a/Test

  C. java /code/a/Test.java /code/b/Best.java

  D. java –cp /code a.Test

  E. javac –d /code /code/a/Test.java /code/b/Best.java

  F. javac –d /code /code/a/Test.java

  Correct Answer: E

• Question 5:

  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.

  Correct Answer: A

• Question 6:

  Given: What is the result?

  

  A. Joe Marry

  B. Joe null

  C. null null

  D. null Mary

  Correct Answer: D

  

• Question 7:

  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 8:

  Given: What is the result?

  

  A. NullPointerException is thrown at line 4.

  B. NullPointerException is thrown at line 10.

  C. A compilation error occurs.

  D. Hello

  Correct Answer: D

  

• Question 9:

  Given:

  

  What is the result?

  A. nothing

  B. 0

  C. 10

  D. 0 4 9

  Correct Answer: A

• Question 10:

  Given:

  

  Which three are true? (Choose three.)

  A. b1.foo(c) prints Bonjour le monde!

  B. f1.foo(c) prints Hello world!

  C. f1.foo(c) prints Ol?Mundo!

  D. b1.foo(c) prints Hello world!

  E. f2.foo(c) prints Ol?Mundo!

  F. b1.foo(c) prints Ol?Mundo!

  G. f2.foo(c) prints Bonjour le monde!

  H. f2.foo(c) prints Hello world!

  I. f1.foo(c) prints Bonjour le monde!

  Correct Answer: BFG