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Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 920 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C03
Question #: 920
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C03 Questions]

A company is migrating from a monolithic architecture for a web application that is hosted on Amazon EC2 to a serverless microservices architecture. The company wants to use AWS services that support an event-driven, loosely coupled architecture. The company wants to use the publish/subscribe (pub/sub) pattern.

Which solution will meet these requirements MOST cost-effectively?

  • A. Configure an Amazon API Gateway REST API to invoke an AWS Lambda function that publishes events to an Amazon Simple Queue Service (Amazon SQS) queue. Configure one or more subscribers to read events from the SQS queue.
  • B. Configure an Amazon API Gateway REST API to invoke an AWS Lambda function that publishes events to an Amazon Simple Notification Service (Amazon SNS) topic. Configure one or more subscribers to receive events from the SNS topic.
  • C. Configure an Amazon API Gateway WebSocket API to write to a data stream in Amazon Kinesis Data Streams with enhanced fan-out. Configure one or more subscribers to receive events from the data stream.
  • D. Configure an Amazon API Gateway HTTP API to invoke an AWS Lambda function that publishes events to an Amazon Simple Notification Service (Amazon SNS) topic. Configure one or more subscribers to receive events from the topic.
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Suggested Answer: B 🗳️
by pujithacg8 at Aug. 10, 2024, 6:32 p.m.
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78b9037
7 hours, 50 minutes ago
Selected Answer: D
HTTP API is cheaper. The difference in pricing is steep. REST APIs will run you USD $3.50 per one million requests plus charges for data transferred out. By contrast, HTTP APIs cost a mere $1.00 per request for the first million requests and then $0.90 per million requests after that.
upvoted 1 times
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jingen11
1 month, 3 weeks ago
Selected Answer: D
Question ask for cheapest. Http api offers everything the requirements asked for. i.e Lambda function for serverless, event driven.
upvoted 1 times
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fis_examtopic
3 months ago
HTTP APIs with Lambda. I'm go with D
upvoted 1 times
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progounick
3 months, 2 weeks ago
Selected Answer: B
rest is cheaper than http
upvoted 1 times
Noveo
3 months, 1 week ago
Quite the opposite: "REST APIs support more features than HTTP APIs, while HTTP APIs are designed with minimal features so that they can be offered at a lower price."
upvoted 2 times
mk168898
1 month ago
based on this answer should be D
upvoted 1 times
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dhewa
3 months, 3 weeks ago
Selected Answer: B
An HTTP API instead might not be necessary for this use case.
upvoted 2 times
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muhammadahmer36
4 months ago
Selected Answer: D
D is the right answer
upvoted 1 times
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pujithacg8
4 months, 1 week ago
B or D, Will go with B
upvoted 2 times
muhammadahmer36
4 months ago
Why B, not D?
upvoted 1 times
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