Oracle Exam 1Z0-809 Topic 7 Question 86 Discussion

Actual exam question for Oracle's 1Z0-809 exam

Question #: 86
Topic #: 7

[All 1Z0-809 Questions]

Which two are elements of a singleton class? (Choose two.)

Aa transient reference to point to the single instance

Ba public method to instantiate the single instance

Ca public static method to return a copy of the singleton reference

Da private constructor to the class

Ea public reference to point to the single instance

Show Suggested Answer

Suggested Answer: B, D

by Barrett at May 02, 2025, 04:25 PM

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Pilar

3 days ago

Singleton, you say? More like 'single-brain-cell' pattern if you ask me. But I'll go with D and E anyway, just to play it safe.

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Noelia

4 days ago

I've got a hunch that D and C are the right choices. The private constructor and the public static method to return the instance? Classic singleton pattern.

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Juan

5 days ago

D and E, baby! The private constructor and the public reference are the way to go. Anything else is just a distraction.

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Dorethea

6 days ago

Haha, this is too easy! The answer is clearly D and B. A private constructor and a public method to get the instance? That's textbook singleton!

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Dominga

9 days ago

Actually, it's B and D because the private constructor ensures only one instance can be created.

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Katina

9 days ago

Hmm, I think A and D are the correct answers. The transient reference and the private constructor are the essential components.

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Vallie

15 days ago

I'm not sure, but I think it's C and E.

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Margart

1 months ago

I agree with Latia, B and D make sense for a singleton class.

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Latia

1 months ago

I think it's B and D.

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Rodrigo

2 months ago

D and E, for sure! The private constructor and the public reference to the single instance are the key elements of a singleton class.

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Xochitl

6 days ago

Definitely, those two elements ensure that only one instance of the class can exist.

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Lisha

7 days ago

Yes, the private constructor and the public reference are essential for a singleton class.

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Cassandra

8 days ago

I think D and E are the correct elements of a singleton class.

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