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Home Oracle 1z0-808

Oracle 1z0-808 Exam Practice Questions (P. 3)

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Question #11
Given:

And given the code fragment:
Book book1 = new EBook();
book1.readBook();
Which option enables the code to compile?

  1. A
    Option A
  2. B
    Option B
  3. C
    Option C
  4. D
    Option D

Correct Answer:
D

Question #12
Given:

What is the result?
  1. A
    A B C D
  2. B
    A C D
  3. C
    A C D D
  4. D
    A B D
  5. E
    A B D C

Correct Answer:
C

Question #13
Given:

Which code fragment should you use at line n1 to instantiate the dvd object successfully?

  1. A
    Option A
  2. B
    Option B
  3. C
    Option C
  4. D
    Option D

Correct Answer:
C

Question #14
Given the code fragment:

Which option can replace xxx to enable the code to print 135?
A.

B.

C.

D.


Correct Answer:
B

Question #15
Which statement best describes encapsulation?
  1. A
    Encapsulation ensures that classes can be designed so that only certain fields and methods of an object are accessible from other objects.
  2. B
    Encapsulation ensures that classes can be designed so that their methods are inheritable.
  3. C
    Encapsulation ensures that classes can be designed with some fields and methods declared as abstract.
  4. D
    Encapsulation ensures that classes can be designed so that if a method has an argument MyType x, any subclass of MyType can be passed to that method.

Correct Answer:
A
chatbot-img GPT-4o - Answer
Encapsulation is a core concept in object-oriented programming that allows for restricting access to certain components of objects. This technique is particularly useful for safeguarding the inner workings of an object by exposing only what is necessary via methods, while keeping other data and methods private. This setup not only prevents interference from other parts of a program but also increases modularity and the ability to make changes to the software without affecting other parts.

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