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What should you do?

You are designing a payments processing application on Google Cloud. The application must continue to serve requests and avoid any user disruption if a regional failure occurs. You need to use AES-256 to encrypt data in the database, and you want to control where you store the encryption key.

What should you do?
A . Use Cloud Spanner with a customer-managed encryption key (CMEK).
B . Use Cloud Spanner with default encryption.
C . Use Cloud SQL with a customer-managed encryption key (CMEK).
D . Use Bigtable with default encryption.

Answer: A

Explanation:

Yes default encryption comes with AES-256 but the question states that you need to control where you store the encryption keys. that can be achieved by CMEK.

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