Which type of data store should you use?

Your company if designing an application that will write a high volume of JSON data and will have an application-defined schema.

Which type of data store should you use?
A . key/value
B . document
C . graph
D . columnar

Answer: A

Explanation:

A key/value store associates each data value with a unique key.

An application can store arbitrary data as a set of values. Any schema information must be provided by the application. The key/value store simply retrieves or stores the value by key.

Reference: https://docs.microsoft.com/en-us/azure/architecture/guide/technology-choices/data-store-overview