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-console-producer.sh

Answer

kafka-admin.sh

Answer

kafka-cluster.sh

Question 2

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

Accepted Answer

168 hours (7 days)

Answer

24 hours

Answer

48 hours

Answer

720 hours (30 days)

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

Leaders are elected only from in-sync replicas

Answer

Leader election is disabled entirely

Answer

Only the controller broker can initiate leader elections

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-offsets.sh

Answer

kafka-console-consumer.sh

Answer

kafka-group-manager.sh

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

The minimum number of replicas a topic must have

Answer

The minimum number of brokers required to start the cluster

Answer

The minimum number of replicas that must be online for leader election

Question 6

What is the purpose of the `kafka-reassign-partitions.sh` tool?

Accepted Answer

To move partition replicas to different brokers

Answer

To change the replication factor of existing topics

Answer

To reassign consumer group members to partitions

Answer

To reorder messages within a partition

Question 7

Which metric best indicates how far behind a Kafka consumer group is from the latest produced messages?

Accepted Answer

records-lag-max

Answer

records-consumed-rate

Answer

fetch-latency-avg

Answer

commit-latency-avg