Tick-Bank is a privately held Internet retailer of both physical and digital products founded in 2008. The company has more than six-million clients worldwide. Tick-Bank aims to serve as a connection between digital content makers and affiliate dealers, who then promote them to clients. Tick-Bank`s technology aids in payments, tax calculations and a variety of customer service tasks. Tick-Bank assists in building perceptibility and revenue making opportunities for entrepreneurs.
Tick-Bank runs multiple java based web applications running on windows based EC2 machines in AWS managed by internal IT Java team, to serve various business functions. Tick-Bank is looking to enable web-site traffic analytics there by understanding user navigational behavior, preferences and other click related info. The amount of data captured per click is in tens of bytes. Tick-Bank has the following objectives in mind for the solution.
Tick-Bank has multiple Kinesis Streams supporting various business processes and uses enhanced fan out consumers to fulfill processing of data. What kind of activities are performed by the consumers using KCL library. Select 4 options.

Answer options:

A.Connects to the stream
B.Enumerates the shards
C.Checkpoints processed records
D.Balances shard-worker associations when shards are split or merged
E.Connects to shards
F.Enumerates multiple streams

Answer: A, B,C,D
The KCL acts as an intermediary between your record processing logic and Kinesis Data Streams.
When you start a KCL application, it calls the KCL to instantiate a worker. This call provides the KCL with configuration information for the application, such as the stream name and AWS credentials.
The KCL performs the following tasks:
 Connects to the stream
 Enumerates the shards
 Coordinates shard associations with other workers (if any)
 Instantiates a record processor for every shard it manages
 Pulls data records from the stream
 Pushes the records to the corresponding record processor
 Checkpoints processed records
 Balances shard-worker associations when the worker instance count changes
 Balances shard-worker associations when shards are split or merged
https://docs.aws.amazon.com/streams/latest/dev/developing-consumers-with-kcl.html