Why is it important to confirm SNS subscriptions when using CloudWatch alarms to send notifications?

hard📝 Conceptual Q10 of 15

AWS - CloudWatch

ACloudWatch alarms only work with confirmed Auto Scaling policies.

BConfirmed subscriptions increase alarm evaluation frequency.

CSNS automatically deletes unconfirmed subscriptions after 24 hours.

DUnconfirmed subscriptions do not receive notifications, causing silent failures.

Step-by-Step Solution

Solution:

Step 1: Understand SNS subscription confirmation
Subscribers must confirm to receive messages; unconfirmed subscriptions silently drop notifications.
Step 2: Clarify other options
Confirmation does not affect alarm frequency; SNS does not auto-delete unconfirmed subscriptions immediately; CloudWatch alarms work independently of subscription confirmation.
Final Answer:
Unconfirmed subscriptions do not receive notifications, causing silent failures. -> Option D
Quick Check:
Confirm SNS subscriptions to ensure notifications arrive [OK]

Quick Trick: Always confirm SNS subscriptions to receive alarm notifications [OK]

Common Mistakes:

MISTAKES

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