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An ecommerce wesbite sells some custom made goods. What's the natural way of modeling this data in Kafka streams?
Mostly-static data is modeled as a table whereas business transactions should be modeled as a stream.
A customer has many consumer applications that process messages from a Kafka topic. Each consumer application can only process 50 MB/s. Your customer wants to achieve a target throughput of 1 GB/s. What is the minimum number of partitions will you suggest to the customer for that particular topic?
each consumer can process only 50 MB/s, so we need at least 20 consumers consuming one partition so that 50 * 20 = 1000 MB target is achieved.
Which of the following event processing application is stateless? (select two)
Stateless means processing of each message depends only on the message, so converting from JSON to Avro or filtering a stream are both stateless operations
Where are KSQL-related data and metadata stored?
metadata is stored in and built from the KSQL command topic. Each KSQL server has its own in-memory version of the metastore.
Your manager would like to have topic availability over consistency. Which setting do you need to change in order to enable that?
unclean.leader.election.enable=true allows non ISR replicas to become leader, ensuring availability but losing consistency as data loss will occur
