A DynamoDB table is configured in provisioned throughput mode with 100 RCU and 40 WCU. How much data can be read and written to the table each second?

Answer options:

A.400 KB for strongly consistent read operations, 800 KB for eventually consistent read operations, 40 KB for write operations
B.400 KB for strongly consistent read operations, 800 KB for eventually consistent read operations, 160 KB for write operations
C.100 KB for strongly consistent read operations, 200 KB for eventually consistent read operations, 40 KB for write operations
D.100 KB for strongly consistent read operations, 200 KB for eventually consistent read operations, 160 KB for write operations

Answer: A
Option A is CORRECT.
One read capacity unit is equivalent to one strongly consistent read per second, or two eventually consistent reads per second, for an item up to 4 KB in size. One write capacity unit is equivalent to one write per second for an item up to 1 KB in size. Therefore, 1000 RCU is equivalent to:
· Strongly Consistent Read operations: 100 RCU * 4KB = 400 KB per second
· Eventually Consistent Read operations: 100 RCU * 4KB = 400 KB per second * 2 = 800 KB per second
· Write operations = 40 WCU * 1KB = 40 KB per second
Reference:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadWriteCapacityMode.html#HowItWorks.ProvisionedThroughput.Manual