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Top 44 Apache Kafka Interview Questions & Answers (2026)

44 Questions 20 Beginner 15 Intermediate 9 Advanced

About Apache Kafka

This technology is widely used in software development and is a frequent topic in technical interviews at companies of all sizes.

What to Expect in a Apache Kafka Interview

Interviews cover both foundational concepts and practical application of this technology, with questions ranging from definitions to architectural decision-making.

How to Use This Guide

Work through questions in order of difficulty to build your understanding progressively. Bookmark challenging questions and revisit them before your interview.

Curated by Tech Baithak Editorial Team · Last updated: May 2026

Beginner 20 questions

Core concepts every Apache Kafka developer must know.

01 What is Apache Kafka? 02 What are the core components of Kafka? 03 What is a Kafka Topic? 04 What is a Kafka Partition? 05 What is a Kafka Producer? 06 What is a Kafka Consumer? 07 What is a Kafka Consumer Group? 08 What is a Kafka Broker? 09 What is a Kafka Offset? 10 What is Kafka's replication mechanism? 11 What is ZooKeeper's role in Kafka? 12 What is the difference between Kafka and traditional message queues like RabbitMQ? 13 What is a Kafka message structure? 14 What is Kafka log compaction? 15 What are Kafka producer acknowledgements (acks)? 16 What is Kafka topic retention? 17 What is the Kafka Schema Registry? 18 What is Kafka Connect? 19 What is Kafka Streams? 20 What is the difference between Kafka and Apache Pulsar?

Intermediate 15 questions

Practical knowledge for developers with hands-on experience.

01 What are Kafka delivery semantics? 02 What is the Kafka idempotent producer? 03 What are Kafka Transactions? 04 What is consumer lag in Kafka and how do you monitor it? 05 What is partition rebalancing in Kafka? 06 What is ksqlDB? 07 What is Kafka MirrorMaker 2? 08 How do you design Kafka topics for high throughput? 09 What is Debezium and how does it work with Kafka? 10 What is Kafka tiered storage? 11 What is Kafka's exactly-once semantics (EOS) implementation? 12 How do you handle schema evolution in Kafka? 13 What is Kafka Cruise Control? 14 What is the difference between Kafka Streams and Apache Flink? 15 How does Kafka handle back pressure?

Advanced 9 questions

Deep expertise questions for senior and lead roles.

01 How do you tune Kafka for ultra-low latency? 02 What is Kafka's ISR (In-Sync Replicas) management and unclean leader election? 03 What is Kafka's controller and how is leader election handled in KRaft mode? 04 How do you implement a dead letter queue (DLQ) pattern in Kafka? 05 What is Kafka's exactly-once semantics in multi-broker transactions? 06 What strategies exist for handling Kafka consumer failures in production? 07 How does Kafka ensure data ordering guarantees? 08 What is the Kafka protocol and how do clients communicate with brokers? 09 How do you monitor and operate Kafka in production?

Back to All Topics 44 questions total