Tell about the main components of Kafka.

Main components of Apache Kafka:

• Producer — a component that publishes (sends) messages to Kafka. It chooses which topic and partition to send data to.

• Broker — a Kafka server that stores data and handles requests for writing and reading messages. A Kafka cluster consists of multiple brokers.

• Topic — a logical category or stream of messages. Topics are divided into partitions for scalability and parallel processing.

• Partition — a part of a topic that stores an ordered set of messages. Each message in a partition has a unique offset index.

• Consumer — a component that reads messages from topics. Consumers can join groups for parallel reading.

• Zookeeper — a service used for coordinating brokers, storing metadata, and managing the cluster (gradually replaced by built-in mechanisms in newer Kafka versions).

These components together provide a high-performance, fault-tolerant, and scalable messaging system.