Oracle 1Z0-815 Online Practice Questions and Exam Preparation

Oracle 1Z0-815 Online 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.
  A. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.

• Question 2:

  Given:

  

  What is the result?

  A. nothing
  C. 10
  D. 0 4 9
  A. nothing

• Question 3:

  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
  D. Hello

  ---

  explanation:

  

• Question 4:

  Given: What is the result?

  

  A. Good Morning, Potter
  B. Good Night, Potter
  C. Good Morning, Harry
  D. Good Night, Harry
  B. Good Night, Potter

  ---

  explanation:

  

• Question 5:

  Given:

  

  What is the result?

  A. Joe Marry
  B. Joe null
  C. null null
  D. null Mary
  D. null Mary

  ---

  explanation:

  

• Question 6:

  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.
  A. Only a module that requires the java.se module is permitted to require the java.sql module.

• Question 7:

  

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

• Question 8:

  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.
  B. Add @Override annotation in line 2.

• Question 9:

  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!
  A. b1.foo(li) prints Hello world!
  B. f1.foo(li) prints Bonjour le monde!
  H. b1.foo(li) prints Hola Mundo!

• Question 10:

  Given:

  

  Which statement is true about the Fox class?

  A. Fox class does not have to override inhabit method, so long as it does not try to call it.
  B. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.
  C. Fox class must implement either Forest or Town interfaces, but not both.
  D. The inhabit method implementation from the first interface that Fox implements will take precedence.
  E. Fox class must provide implementation for the inhabit method.
  B. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.