Questions 52 to 54

Explanations for questions 52 to 54

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Question 52

A customer has a production application running on Amazon EC2. The application frequently overwrites and deletes data. It is essential that the application receives the most up-to-date version of the data whenever it is requested.

Which service is most appropriate for these requirements?

  1. Amazon RedShift
  2. Amazon S3
  3. AWS Storage Gateway
  4. Amazon RDS

Correct Answer: 4

Explanation: For this scenario, when retrieving data, the chosen storage solution should always return the most up-to-date data. Therefore, we must use Amazon RDS because it provides read-after-write consistency.

INCORRECT: “Amazon RedShift” is incorrect. Amazon RedShift is a data warehouse and is not used as a transactional database, so this is the wrong use case for it.

INCORRECT: “Amazon S3” is incorrect. Amazon S3 only provides eventual consistency for overwrites and deletes.

INCORRECT: “AWS Storage Gateway” is incorrect. AWS Storage Gateway is used for enabling hybrid cloud access to AWS storage services from on-premises.

CORRECT: “Amazon RDS” is the correct answer.


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