Apache Kafka Kafka Admin & Operations

Question 1

Which command-line tool is used to create, delete, describe, and alter Kafka topics?

Accepted Answer

kafka-topics.sh

Answer

kafka-topics.sh is the standard CLI tool for managing Kafka topics including create, delete, alter, and describe operations.

Question 2

What is the default value for the `log.retention.hours` configuration in Apache Kafka?

Accepted Answer

168 hours (7 days)

Answer

The default log.retention.hours is 168 hours (7 days), after which messages are eligible for deletion by the log cleaner.

Question 3

What happens when `unclean.leader.election.enable` is set to true on a Kafka broker?

Accepted Answer

Out-of-sync replicas can become leaders, potentially causing data loss

Answer

When unclean.leader.election.enable=true, replicas not in the ISR can be elected leader, improving availability at the cost of potential data loss.

Question 4

Which CLI tool is used to list, describe, and reset consumer group offsets in Kafka?

Accepted Answer

kafka-consumer-groups.sh

Answer

kafka-consumer-groups.sh manages consumer group metadata including listing groups, describing lag, resetting offsets, and deleting groups.

Question 5

What does the `min.insync.replicas` broker/topic setting control?

Accepted Answer

The minimum number of replicas that must acknowledge a write for it to succeed

Answer

min.insync.replicas specifies how many ISR replicas must acknowledge a write before the producer receives success, working with acks=all for durability.

Apache Kafka Practice Test

Apache Kafka Practice Test

Apache Kafka Kafka Admin & Operations