You have created an Amazon DynamoDB table with Global Secondary Index. Which of the following can be used to get the latest results quickly with the least impact on RCU (Read Capacity Unit)?

Answer options:

A.Query with ConsistentRead
B.Scan with ConsistentRead
C.Query with EventualRead
D.Scan with EventualRead

Correct Answer – C
Global Secondary Index does not support Consistent read. It only supports Eventual Read. For other tables, Query with Consistent Read will provide the latest results without scanning the whole table.
Option A is incorrect as Global Secondary Index does not support Consistent read.
Option B is incorrect as Scan will impact performance as it will scan the whole table.
Option D is incorrect as Scan will impact performance as it will scan the whole table.
For more information for Query with DynamoDB, refer to the following URL-
https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Query.html