HikeHills.com (HH) is an online specialty retailer that sells clothing and outdoor refreshment gear for trekking, go camping, boulevard biking, mountain biking, rock hiking, ice mountaineering, skiing, avalanche protection, snowboarding, fly fishing, kayaking, rafting, road and trace running, and many more.
HH runs their entire online infrastructure on java based web applications running on AWS. The HH is capturing click stream data and use custom-build recommendation engine to recommend products which eventually improve sales, understand customer preferences and already using AWS kinesis KPL to collect events and transaction logs and process the stream.
HH is planning to consider Kinesis Streams to address integration and the architecture team is planning to define naming standards for each component in the streams. Please advice. Select 3 options.

Answer options:

A.Stream is a set of shards, A shard has a sequence of data records
B.Shard is a set of streams, A stream has a set of data records
C.Stream is a set of records, A record has a sequence of shards
D.Data records are composed of a sequence number, a partition key, and a data blob, which is an immutable sequence of bytes
E.Data streams are composed of a sequence number, a partition key, and a data blob, which is an immutable sequence of bytes
F.Data shards are composed of a sequence number, a partition key, and a data blob, which is an immutable sequence of bytes
G.A data stream’s retention period is set to a default of 24 hours after creation
H.
A data record’s retention period is set to a default of 24 hours after creation

Answer: A, D, G
Option A is correct -A Kinesis data stream is a set of shards. Each data record has a sequence number that is assigned by Kinesis Data Streams.
https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html
Option B is incorrect -Each shard has a sequence of data records. A shard is a uniquely identified sequence of data records in a stream. A stream is composed of one or more shards, each of which provides a fixed unit of capacity. Each shard can support up to 5 transactions per second for reads, up to a maximum total data read rate of 2 MB per second and up to 1,000 records per second for writes, up to a maximum total data write rate of 1 MB per second (including partition keys). The data capacity of your stream is a function of the number of shards that you specify for the stream. The total capacity of the stream is the sum of the capacities of its shards.
https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html
Option C is incorrect -A Kinesis data stream is a set of shards. Each shard has a sequence of data records. Each data record has a sequence number that is assigned by Kinesis Data Streams
https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html
Option D is correct - A data record is the unit of data stored in a Kinesis data stream. Data records are composed of a sequence number, a partition key, and a data blob, which is an immutable sequence of bytes. Kinesis Data Streams does not inspect, interpret, or change the data in the blob in any way. A data blob can be up to 1 MB.https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html
Option E is incorrect -A Kinesis data stream is a set of shards. Each shard has a sequence of data records. Each data record has a sequence number that is assigned by Kinesis Data Streams
https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html
Option F is incorrect -Each shard has a sequence of data records. A shard is a uniquely identified sequence of data records in a stream. A stream is composed of one or more shards, each of which provides a fixed unit of capacity. Each shard can support up to 5 transactions per second for reads, up to a maximum total data read rate of 2 MB per second and up to 1,000 records per second for writes, up to a maximum total data write rate of 1 MB per second (including partition keys). The data capacity of your stream is a function of the number of shards that you specify for the stream. The total capacity of the stream is the sum of the capacities of its shards.
https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html
Option G is correct -The retention period is the length of time that data records are accessiblH. No. the retention period is set at stream level. The retention period is the length of time that data records are accessible after they are added to the stream. A stream’s retention period is set to a default of 24 hours after creation. You can increase the retention period up to 168 hours (7 days)e after they are added to the stream. A stream’s retention period is set to a default of 24 hours after creation. You can increase the retention period up to 168 hours (7 days)
https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html
Option H is incorrect - the retention period is set at stream level. The retention period is the length of time that data records are accessible after they are added to the stream. A stream’s retention period is set to a default of 24 hours after creation. You can increase the retention period up to 168 hours (7 days)
https://docs.aws.amazon.com/streams/latest/dev/key-concepts.html