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AWS Certified Solutions Architect - Associate · AWS
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Both API Gateway and Lambda are suitable as they are scalable.
Ans B - I was going for option D... but then I saw bullrem's response (1 year, 9 mth ago): "Option D is similar to option B in that it uses Amazon API Gateway to handle the API requests, but it also includes an EC2 instance to perform the tax computations. However, using an EC2 instance in this way is less scalable and less elastic than using AWS Lambda to perform the computations."
b. easy