Oracle
1Z0-807 · Question #18
An online library wants to introduce a feature where an email notification is generated whenever a book becomes available for circulation. This notification must be sent to only those members who…
The correct answer is A. Observer. See the full explanation below for the reasoning.
Question
An online library wants to introduce a feature where an email notification is generated whenever a book becomes available for circulation. This notification must be sent to only those members who have expressed interest in that book. Which design pattern would you use to implement this requirement?
Options
- AObserver
- BPayload Extractor
- CAsynchronous Resource Integrator
- DWeb Service Broker
- EService Starter
How the community answered
(55 responses)- A71% (39)
- B5% (3)
- C18% (10)
- D2% (1)
- E4% (2)
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