Microsoft Azure Data Fundamentals — Question 302

Your company is designing a database that will contain session data for a website. The data will include notifications, personalization attributes, and products that are added to a shopping cart.
Which type of data store will provide the lowest latency to retrieve the data?

Answer options

• A. key/value
• B. graph
• C. columnar
• D. document

Correct answer: A

Explanation

The key/value data store is optimized for fast retrieval of data using unique keys, which makes it ideal for session data that needs to be accessed quickly. Other options like graph, columnar, and document stores introduce additional complexity and overhead, leading to higher latency in data retrieval.