AWS Certified Cloud Practitioner (CLF-C02) — Question 325

Which AWS service uses a combination of publishers and subscribers?

Answer options

• A. AWS Lambda
• B. Amazon Simple Notification Service (Amazon SNS)
• C. Amazon CloudWatch
• D. AWS CloudFormation

Correct answer: B

Explanation

Amazon Simple Notification Service (Amazon SNS) is a fully managed messaging service designed around the publisher/subscriber (pub/sub) paradigm to send messages to various endpoints. In contrast, AWS Lambda is a serverless compute service, Amazon CloudWatch is used for monitoring and observability, and AWS CloudFormation is an infrastructure as code tool.