Google Cloud Professional Data Engineer — Question 5

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?

Answer options

Correct answer: D

Explanation

Cloud Datastore is a fully managed NoSQL database that automatically scales to handle high traffic, making it the best choice for applications with unpredictable growth. Cloud SQL is not ideal due to its relational nature and scaling limitations, while BigQuery is designed for analytics rather than transactional workloads. Cloud Bigtable is suited for large analytical workloads but may not be optimal for point-of-sale transactions.