You want to process payment transactions in a point-of-sale application that will run on Google Cloud Platform. Your user base could grow exponentially, but you do not want to manage infrastructure scaling. Which Google database service should you use?
A. Cloud SQL
B. BigQuery
C. Cloud Bigtable
D. Cloud Datastore
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D is right answer. the criteria is automatic scaling upon exponentially.
If you need a relational database with full SQL support for an online transaction processing (OLTP) system, consider Cloud SQL.
https://cloud.google.com/datastore/docs/concepts/overview
Since infrastructure scaling should not be managed. It should be D
Think A is best
Need acid so has to be A or D….”grow exponentially” leads to datastore. Depending on the sizing (talking about several GB or several TB) both could do.