Kafka interview questions

18 Kafka questions from the Message Queues bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.

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1. What is Consumer group?

Mid
  1. A.the policy that keeps records for a configured time or size rather than deleting them upon consumption
  2. B.the single partition copy that handles all reads and writes while followers stay in sync
  3. C.a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time
  4. D.the redistribution of partition assignments among group members when a consumer joins or leaves

Answer + AI explanation with Pro

2. Which term means: "a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time"?

Mid
  1. A.Log retention
  2. B.Rebalance
  3. C.Consumer group
  4. D.Replication factor

Answer + AI explanation with Pro

3. Which statement is correct?

Mid
  1. A.Consumer group — the number of copies of each partition kept across brokers to tolerate node failure
  2. B.Consumer group — the redistribution of partition assignments among group members when a consumer joins or leaves
  3. C.Consumer group — the append-only, ordered, immutable record structure that underpins how this platform stores each partition
  4. D.Consumer group — a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time

Answer + AI explanation with Pro

4. What is Commit log?

Mid
  1. A.the append-only, ordered, immutable record structure that underpins how this platform stores each partition
  2. B.the redistribution of partition assignments among group members when a consumer joins or leaves
  3. C.a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time
  4. D.the policy that keeps records for a configured time or size rather than deleting them upon consumption

Answer + AI explanation with Pro

5. Which term means: "the append-only, ordered, immutable record structure that underpins how this platform stores each partition"?

Mid
  1. A.Commit log
  2. B.Rebalance
  3. C.Replication factor
  4. D.Consumer group

Answer + AI explanation with Pro

6. Which statement is correct?

Mid
  1. A.Commit log — the append-only, ordered, immutable record structure that underpins how this platform stores each partition
  2. B.Commit log — the redistribution of partition assignments among group members when a consumer joins or leaves
  3. C.Commit log — the single partition copy that handles all reads and writes while followers stay in sync
  4. D.Commit log — the policy that keeps records for a configured time or size rather than deleting them upon consumption

Answer + AI explanation with Pro

7. What is Log retention?

Mid
  1. A.the redistribution of partition assignments among group members when a consumer joins or leaves
  2. B.a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time
  3. C.the policy that keeps records for a configured time or size rather than deleting them upon consumption
  4. D.the single partition copy that handles all reads and writes while followers stay in sync

Answer + AI explanation with Pro

8. Which term means: "the policy that keeps records for a configured time or size rather than deleting them upon consumption"?

Mid
  1. A.Consumer group
  2. B.Log retention
  3. C.Commit log
  4. D.Rebalance

Answer + AI explanation with Pro

9. Which statement is correct?

Mid
  1. A.Log retention — the policy that keeps records for a configured time or size rather than deleting them upon consumption
  2. B.Log retention — the redistribution of partition assignments among group members when a consumer joins or leaves
  3. C.Log retention — the number of copies of each partition kept across brokers to tolerate node failure
  4. D.Log retention — the append-only, ordered, immutable record structure that underpins how this platform stores each partition

Answer + AI explanation with Pro

10. What is Replication factor?

Senior
  1. A.the redistribution of partition assignments among group members when a consumer joins or leaves
  2. B.the single partition copy that handles all reads and writes while followers stay in sync
  3. C.the number of copies of each partition kept across brokers to tolerate node failure
  4. D.the policy that keeps records for a configured time or size rather than deleting them upon consumption

Answer + AI explanation with Pro

11. Which term means: "the number of copies of each partition kept across brokers to tolerate node failure"?

Senior
  1. A.Consumer group
  2. B.Commit log
  3. C.Replication factor
  4. D.Leader replica

Answer + AI explanation with Pro

12. Which statement is correct?

Senior
  1. A.Replication factor — a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time
  2. B.Replication factor — the number of copies of each partition kept across brokers to tolerate node failure
  3. C.Replication factor — the policy that keeps records for a configured time or size rather than deleting them upon consumption
  4. D.Replication factor — the append-only, ordered, immutable record structure that underpins how this platform stores each partition

Answer + AI explanation with Pro

13. What is Rebalance?

Senior
  1. A.the number of copies of each partition kept across brokers to tolerate node failure
  2. B.a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time
  3. C.the redistribution of partition assignments among group members when a consumer joins or leaves
  4. D.the policy that keeps records for a configured time or size rather than deleting them upon consumption

Answer + AI explanation with Pro

14. Which term means: "the redistribution of partition assignments among group members when a consumer joins or leaves"?

Senior
  1. A.Log retention
  2. B.Rebalance
  3. C.Leader replica
  4. D.Replication factor

Answer + AI explanation with Pro

15. Which statement is correct?

Senior
  1. A.Rebalance — the single partition copy that handles all reads and writes while followers stay in sync
  2. B.Rebalance — the number of copies of each partition kept across brokers to tolerate node failure
  3. C.Rebalance — the redistribution of partition assignments among group members when a consumer joins or leaves
  4. D.Rebalance — the policy that keeps records for a configured time or size rather than deleting them upon consumption

Answer + AI explanation with Pro

16. What is Leader replica?

Senior
  1. A.the redistribution of partition assignments among group members when a consumer joins or leaves
  2. B.a set of cooperating readers that share a subscription so each partition is handled by exactly one member at a time
  3. C.the single partition copy that handles all reads and writes while followers stay in sync
  4. D.the number of copies of each partition kept across brokers to tolerate node failure

Answer + AI explanation with Pro

17. Which term means: "the single partition copy that handles all reads and writes while followers stay in sync"?

Senior
  1. A.Rebalance
  2. B.Commit log
  3. C.Consumer group
  4. D.Leader replica

Answer + AI explanation with Pro

18. Which statement is correct?

Senior
  1. A.Leader replica — the single partition copy that handles all reads and writes while followers stay in sync
  2. B.Leader replica — the policy that keeps records for a configured time or size rather than deleting them upon consumption
  3. C.Leader replica — the redistribution of partition assignments among group members when a consumer joins or leaves
  4. D.Leader replica — the append-only, ordered, immutable record structure that underpins how this platform stores each partition

Answer + AI explanation with Pro

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