Few topics that you need to cover for Kafka interview:

1. Topic
- Partition
- Message ordering
- Replication
- Offset
- Compression

2. Producer
- Serialization
- Batching
- Compaction
- Intervals
- Sync & Async
- Idempotence
- Some important properties

3. Broker
- Kafka cluster
- Replication
- Retention
- Cleanup
- Graceful shut down

4. Consumer
- Deserialization
- Consumer group
- Consumption types
- Sync & Async
- Failure handling
- Some important properties

5. Zookeeper
6. Schema registry
7. Admin client API, MakeMirror
8. Kafka Streams
9. Kafka Connect