AWS Certified Cloud Practitioner — Question 339
Which AWS service uses a combination of publishers and subscribers?
Answer options
- A. AWS Lambda
- B. Amazon Simple Notification Service (Amazon SNS)
- C. Amazon Cloud Watch
- D. AWS CloudFormation
Correct answer: B
Explanation
Amazon Simple Notification Service (Amazon SNS) is a fully managed messaging service designed specifically around the publisher-subscriber (pub/sub) pattern. AWS Lambda is a serverless compute service, Amazon CloudWatch is used for monitoring and observability, and AWS CloudFormation is an infrastructure-as-code service, none of which utilize a publisher-subscriber architecture as their core model.