Oracle Exam 1Z0-900 Topic 2 Question 61 Discussion

Actual exam question for Oracle's 1Z0-900 exam

Question #: 61
Topic #: 2

[All 1Z0-900 Questions]

Given the code sample:

And:

And the next fragment from beans.xml:

And this injection point:

@Inject GenericMessenger messageHandler;

Which type would be injected at run time and referenced by the messageHandler variable?

ASmsHandler

BMsgHandler

CNone of the above. An exception would be thrown due to ambiguous bean references.

DGenericMessenger

Show Suggested Answer

Suggested Answer: B

by Jennifer at Mar 31, 2023, 10:17 AM

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Anastacia

2 months ago

Haha, this question is like a game of 'guess the bean'. I'm going to go with C and pray for the best. Ambiguous bean references are the bane of every Java developer's existence.

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Dyan

21 days ago

I agree, C seems like the most cautious choice given the circumstances.

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Asha

1 months ago

I'm leaning towards D, but I see your point about C being a potential issue.

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Shaunna

2 months ago

I think C is the safest bet here. Ambiguous bean references can be tricky.

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Tambra

2 months ago

I bet the answer is D. GenericMessenger. The injection point is using that interface, so it should just return the base interface implementation, right? *scratches head*

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Lucy

2 months ago

Definitely C. An exception would be thrown. How are we supposed to know which implementation to choose when there are multiple beans of the same type? This is a tricky one!

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Estrella

8 days ago

I think it's D) GenericMessenger.

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Beckie

16 days ago

SmsHandler would be injected at run time.

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Eladia

1 months ago

I agree, it's definitely C.

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Zana

2 months ago

None of the above. An exception would be thrown due to ambiguous bean references.

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Sarina

2 months ago

I think it's D) GenericMessenger.

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Mike

2 months ago

SmsHandler would be injected at run time.

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Truman

2 months ago

Hmm, you might be right. I guess it depends on how the beans are configured in the application context.

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Vannessa

2 months ago

I'm going with B. MsgHandler. The code samples show that MsgHandler implements GenericMessenger, and it's the only one that matches the injection point.

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Elza

2 months ago

Hmm, I think the answer is C. The beans.xml configuration seems to have multiple beans that implement the GenericMessenger interface, so there would be an ambiguous bean reference exception.

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