An application stores its data in a DynamoDB table. The application team finds that they have a new query pattern, creating a new LSI to accommodate the new queries. The application starts to experience throttling when performing write operations on the base table even though the number of table updates has not increased. What is the cause of the issue?

Answer options:

A.LSI shares read-capacity with the base table.
B.LSI shares write-capacity with the base table.
C.Data replication to the LSI is synchronous causing latency.
D.Creation of the LSI forces write operations to be strongly consistent.

Answer: B
Option A is incorrect because read capacity units are not related to write throughput.
Option B is CORRECT because LSI and base table share capacity units. Performing write operations to a table causes the LSI to be also updated. This consumes write capacity units from the base table. In this case, the addition of the LSI is causing the provisioned write capacity to be exceeded.
Option C is incorrect because latency would not be causing request throttling.
Option D is incorrect because consistency level is associated with read operations, not write operations.
Reference:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/SecondaryIndexes.html