Free AWS DOP-C02 Actual Exam Questions - Question 8 Discussion
company has configured the stack to send event notifications to an Amazon Simple Notification
Service (Amazon SNS) topic.
A DevOps engineer must implement an automated solution that applies a tag to the specific Cloud
Formation stack instance only after a successful stack update occurs. The DevOps engineer has
created an AWS Lambda function that applies and updates this tag (or the specific slack instance.
Which solution will meet these requirements?
B tbh seems off since AWS Config is more about compliance checks, not real-time event triggers for stack updates. EventBridge in C is more direct and real-time for this use case.
It’s C. Using an EventBridge rule to catch the UPDATE_COMPLETE event is more precise and doesn’t depend on how the SNS topic is configured or whether it’s shared with other stacks. This way, the Lambda runs only when that specific event happens, avoiding unnecessary triggers. Option D depends a lot on how the SNS topic is set up, and if it’s shared or not filtered properly, the Lambda could fire off for unrelated events. EventBridge feels like the cleaner, more direct approach here.
Probably C since EventBridge directly targets stack update completions without extra filtering.
Maybe D makes sense because the stack already sends notifications to an SNS topic. If the topic is set up to only get UPDATE_COMPLETE events for that specific stack, subscribing the Lambda there is a clean way to trigger the tagging right after success. It uses existing infrastructure without extra rules or Config setup, which feels simpler. Also, if the topic is dedicated to that stack’s updates, no extra filtering is needed on Lambda’s side. That said, if the SNS topic has multiple stacks or event types, then C might be cleaner since EventBridge can target specific event patterns more precis
It’s D, subscribing Lambda to SNS from just the stack’s UPDATE COMPLETE simplifies the flow.
C. EventBridge rules are designed for this kind of event-driven automation and can catch the stack update completion directly, making it simpler than adding extra steps with SNS or Config rules.
Option C could work well too. EventBridge rules are great for catching specific stack events like UPDATE COMPLETE and triggering Lambda directly, without extra SNS setup. It's pretty efficient.
D seems the most straightforward here. The stack sends notifications on UPDATE COMPLETE only, then the Lambda subscribed to the SNS topic triggers right after success. Cleaner and less overhead than custom rules or automation.