A development team has been instructed to use Kinesis Streams to stream data from various web-based applications. They also need to develop the consumer-based components. Which of the following is used to specify the location from where you can start reading records from a Kinesis stream?

Answer options:

A.ShardLoc
B.ShardIterator
C.ShardNumber
D.StreamLoc

Answer - B
The AWS Documentation mentions the following
Specify a shard iterator using the ShardIterator parameter. The shard iterator specifies the position in the shard from which you want to start reading data records sequentially. If there are no records available in the portion of the shard that the iterator points to, GetRecords returns an empty list. It might take multiple calls to get to a portion of the shard that contains records.
Since this is clearly mentioned in the AWS Documentation , all other options are incorrect
For more information on the GetRecords command, please refer to the below URL
https://docs.aws.amazon.com/kinesis/latest/APIReference/API_GetRecords.html