An application is being designed to make use of DynamoDB. As per the requirements, the application will read the DynamoDB items of 6 KB of size per second. The number of requests per second is estimated to be around 10. If strong consistency is required, what should be the read capacity set for the table?

Answer options:

A.5
B.10
C.20
D.40

Answer - C
The calculation of throughput capacity for the table would be as follows.
Since 6KB’s is the item size, we need to consider it in chunks of 4KB. Hence that would be 2.
Since there are around 10 requests per second, that means = 2*10=20.
Since it`s required at a strong consistency level, the read capacity would be 20.
Based on the calculations, all other options are incorrect.
For more information on DynamoDB throughput, please refer to the below URL-
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ProvisionedThroughput.html