Final answer:
1 RCU in DynamoDB represents one read operation per second.
Step-by-step explanation:
In DynamoDB, 1 RCU represents one read operation per second.
RCU stands for Read Capacity Unit, which is a unit of capacity in DynamoDB that represents the number of strongly consistent read operations that can be performed per second.
For example, if you have a table with a provisioned RCU of 5, it means that you can perform 5 read operations per second on that table.