Kafka Interview Questions - Practice Questions with Answers and Scoring
Practice Kafka interview questions with an interactive experience designed for real-world preparation. Attempt curated questions, reveal clear explanations, and track your performance with instant scoring.
Top Kafka Interview Questions for Freshers and Experienced
40 Questions
2 Pages
Easy · Medium · Hard
Page 1 of 2
1
How does Kafka ensure message ordering within a partition?
medium
partitioningordering
2
What happens if a Kafka producer sends messages without a key?
medium
producerpartitioning
3
Explain the role of partitions in Kafka scalability.
medium
partitioningscalability
4
What is ISR (In-Sync Replica) in Kafka?
hard
replicationisr
5
How does Kafka handle consumer offset management?
medium
consumeroffsets
6
What issue occurs if multiple consumers read from the same partition?
medium
consumer-grouppartitioning
7
How would you debug consumer lag in Kafka?
hard
debuggingconsumer-lag
8
What is the purpose of Kafka retention policy?
medium
retentionstorage
9
Explain leader election in Kafka.
hard
replicationleader-election
10
What happens when ISR shrinks?
hard
isrreplication
11
How does Kafka ensure durability of messages?
medium
durabilityreplication
12
What is the difference between at-least-once and exactly-once delivery?
hard
delivery-semanticstransactions
13
How does Kafka handle high throughput?
medium
performancethroughput
14
What is idempotent producer in Kafka?
hard
produceridempotence
15
What happens if a consumer crashes before committing offset?
medium
consumeroffsets
16
How does Kafka achieve fault tolerance?
medium
fault-tolerancereplication
17
What is a Kafka broker?
easy
brokerarchitecture
18
Explain the role of ZooKeeper in Kafka (legacy setup).
medium
zookeeperarchitecture
19
What is KRaft mode in Kafka?
hard
kraftarchitecture
20
How does Kafka handle backpressure?
hard
performancebackpressure
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