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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?

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Suggested Answer: B

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

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Julian
1 months ago
I'm just hoping the exam doesn't have any trick questions that try to pair me up with the wrong answer!
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Alana
2 months ago
This is a real head-scratcher. I'm gonna have to pair-down my options here. I think D is the way to go, unless I'm just pair-ing things wrong.
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Queen
7 days ago
Yeah, that seems like the most secure option to meet the requirement.
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Shaniqua
21 days ago
I agree, making left, right, setLeft, and setRight private should ensure p.isValid() returns true.
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Talia
26 days ago
I think D is the best choice here.
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Charlie
2 months 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!
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Vi
17 days ago
User 3: Agreed, privacy is key when it comes to ensuring p.isValid() returns true.
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Rolf
26 days ago
User 2: Yeah, keeping left, right, setLeft, and setRight private seems like the way to go.
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Karan
1 months ago
User 1: I think Option D is the best choice.
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Marleen
2 months 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!
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Dick
11 days ago
Exactly, better safe than sorry when it comes to maintaining the integrity of our objects.
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Mozelle
14 days ago
Definitely, we don't want any outside interference causing issues.
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Jani
18 days ago
Yeah, I agree. Keeping everything private is a good way to protect the Pair object.
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Rupert
20 days ago
I think Option D is the best choice to ensure the requirement is met.
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Katie
2 months ago
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.
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Glory
1 months ago
Agreed, encapsulating the fields and making the setters private would ensure the requirement is met.
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Marilynn
1 months ago
I think option D is the best choice.
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Quentin
2 months ago
But if left and right are private, then setLeft and setRight should also be private to maintain encapsulation.
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Felicia
3 months ago
I disagree, I believe the answer is D) left, right, setLeft, and setRight must be private.
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Quentin
3 months ago
I think the answer is B) left and right must be private.
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