Which option contains the essential components of the Oracle Cloud Infrastructure Notifications service? (Choose the best answer.)
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A. B. C. D.D.
The correct answer is B. A TOPIC with a name unique across the tenancy, a SUBSCRIPTION, and a MESSAGE where content is published.
Oracle Cloud Infrastructure Notifications service provides a way to broadcast messages to subscribers through a publish-subscribe model. Publishers can send messages to a topic, and subscribers can receive those messages by subscribing to the topic.
The essential components of the Oracle Cloud Infrastructure Notifications service are:
TOPIC: A named destination or channel to which messages are sent. Topics are created in a compartment and have a name that is unique across the tenancy. A topic can have multiple subscriptions.
SUBSCRIPTION: A subscription is a way to specify the destination for messages published to a topic. A subscription specifies the protocol used to deliver messages, the endpoint to deliver messages to, and any optional filtering rules. Subscriptions are created in a compartment.
MESSAGE: A message is the information that is sent to a topic. Messages can be in any format, such as JSON, plain text, or XML.
Option A is incorrect because it mentions an ALARM and a METRIC, which are not essential components of the Oracle Cloud Infrastructure Notifications service. Alarms and metrics are part of the Oracle Cloud Infrastructure Monitoring service.
Option C is incorrect because it mentions a TOPIC that is unique across the compartment, but topics should have a unique name across the tenancy.
Option D is incorrect because it mentions an ALARM that is unique across the compartment, but alarms should have a unique name across the tenancy.