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A company uses a service to collect metadata from applications that the company hosts on premises. Consumer devices such as TVs and internet radios access the applications. Many older devices do not support certain HTTP headers and exhibit errors when these headers are present in responses. The company has configured an on-premises load balancer to remove the unsupported headers from responses sent to older devices, which the company identified by the User-Agent headers. The company wants to migrate the service to AWS, adopt serverless technologies, and retain the ability to support the older devices. The company has already migrated the applications into a set of AWS Lambda functions. Which solution will meet these requirements?
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A company uses AWS Organizations for a multi-account setup in the AWS Cloud. The company's finance team has a data processing application that uses AWS Lambda and Amazon DynamoDB. The company's marketing team wants to access the data that is stored in the DynamoDB table. The DynamoDB table contains confidential data. The marketing team can have access to only specific attributes of data in the DynamoDB table. The fi-nance team and the marketing team have separate AWS accounts. What should a solutions architect do to provide the marketing team with the appropriate access to the DynamoDB table?
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Question 198 - SAP-C02 discussion

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A company hosts a blog post application on AWS using Amazon API Gateway, Amazon DynamoDB, and AWS Lambda. The application currently does not use

API keys to authorize requests. The API model is as follows:

GET/posts/[postid] to get post details

GET/users[userid] to get user details

GET/comments/[commentid] to get comments details

The company has noticed users are actively discussing topics in the comments section, and the company wants to increase user engagement by marking the comments appears in real time.

Which design should be used to reduce comment latency and improve user experience?


A.
Use edge-optimized API with Amazon CloudFront to cache API responses.
Answers
A.
Use edge-optimized API with Amazon CloudFront to cache API responses.
B.
Modify the blog application code to request GET comment[commented] every 10 seconds.
Answers
B.
Modify the blog application code to request GET comment[commented] every 10 seconds.
C.
Use AWS AppSync and leverage WebSockets to deliver comments.
Answers
C.
Use AWS AppSync and leverage WebSockets to deliver comments.
D.
Change the concurrency limit of the Lambda functions to lower the API response time.
Answers
D.
Change the concurrency limit of the Lambda functions to lower the API response time.
Suggested answer: C

Explanation:

https://docs.aws.amazon.com/appsync/latest/devguide/graphql-overview.html

AWS AppSync is a fully managed GraphQL service that allows applications to securely access, manipulate, and receive data as well as real-time updates from multiple data sources1.AWS AppSync supports GraphQL subscriptions to perform real-time operations and can push data to clients that choose to listen to specific events from the backend1.AWS AppSync uses WebSockets to establish and maintain a secure connection between the clients and the API endpoint2. Therefore, using AWS AppSync and leveraging WebSockets is a suitable design to reduce comment latency and improve user experience.

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asked 16/09/2024
Arun Samuel
41 questions
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