Broker nodes in Kafka - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a broker node in Kafka?

A broker node is a server in a Kafka cluster that stores and manages message data. It receives messages from producers, stores them, and serves them to consumers.

beginner

How does a Kafka broker handle message storage?

A Kafka broker stores messages in partitions on disk. Each partition is an ordered, immutable sequence of messages that is continually appended to.

intermediate

What role does a broker node play in fault tolerance?

Broker nodes replicate partitions to other brokers. If one broker fails, another broker with a replica can take over, ensuring no data loss and high availability.

intermediate

Explain the difference between a leader and follower broker in Kafka.

Each partition has one leader broker that handles all reads and writes. Other brokers with replicas are followers that replicate data from the leader to stay in sync.

beginner

How do broker nodes communicate with producers and consumers?

Broker nodes use TCP connections to communicate with producers and consumers. Producers send messages to brokers, and consumers fetch messages from brokers.

What is the main function of a Kafka broker node?

A Store and manage messages

B Produce messages only

C Consume messages only

D Manage user authentication

Kafka broker nodes store and manage messages by receiving from producers and serving to consumers.

What is a partition leader in Kafka?

A A consumer that reads messages

B A backup server for Kafka

C A producer that sends messages

D A broker that handles all reads and writes for a partition

The leader broker manages all read and write requests for its partition.

How do Kafka brokers ensure data availability if one broker fails?

A By replicating partitions to follower brokers

B By deleting old messages

C By stopping all producers

D By restarting the cluster

Replication to follower brokers allows failover and data availability.

Which protocol do Kafka brokers use to communicate with clients?

A FTP

B TCP

C HTTP

D SMTP

Kafka brokers use TCP connections for communication with producers and consumers.

What happens if a follower broker falls behind the leader?

A It deletes all data

B It becomes the leader immediately

C It tries to catch up by replicating missing data

D It disconnects from the cluster

Followers replicate data from the leader to stay synchronized.

Describe the role of broker nodes in a Kafka cluster and how they manage message data.

Think about how messages flow through Kafka and where they are kept.

Explain how Kafka broker nodes handle fault tolerance and data replication.

Consider what happens if one broker stops working.