Oracle Exam 1Z0-819 Topic 8 Question 87 Discussion

Actual exam question for Oracle's 1Z0-819 exam

Question #: 87
Topic #: 8

[All 1Z0-819 Questions]

Given:

It is required that if p instanceof Pair then p.isValid() returns true.

Which is the smallest set of visibility changes to insure this requirement is met?

AsetLeft and setRight must be protected.

Bleft and right must be private.

CisValid must be public.

Dleft, right, setLeft, and setRight must be private.

Show Suggested Answer

Suggested Answer: B

by Kristine at Aug 07, 2024, 09:10 PM

Limited Time Offer

25%

Off

Get Premium 1Z0-819 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Charlie

14 hours ago

I'm feeling a bit pair-anoiac about this question. But Option D seems like the way to go. Gotta keep those private parts, well, private!

upvoted 0 times

...

Marleen

6 days ago

Hmm, this is a tricky one. I'd go with Option D too, just to be on the safe side. Can't have those pesky outside influences messing with my Pair object!

upvoted 0 times

...

Option D looks like the best choice to ensure the requirement is met. Encapsulating the left and right fields, and making the setters private, would prevent direct access and maintain the validity constraint.

upvoted 0 times

...

Quentin

23 days ago

But if left and right are private, then setLeft and setRight should also be private to maintain encapsulation.

upvoted 0 times

...

Felicia

25 days ago

I disagree, I believe the answer is D) left, right, setLeft, and setRight must be private.

upvoted 0 times

...

Quentin

26 days ago

I think the answer is B) left and right must be private.

upvoted 0 times

...

Oracle Exam 1Z0-819 Topic 8 Question 87 Discussion

Contribute your Thoughts:

Charlie

Marleen

Katie

Quentin

Felicia

Quentin