Apache Kafka Kafka Producers & Consumers

Question 1

Which producer configuration controls the maximum time (in ms) a producer will wait before sending a batch of records?

Accepted Answer

linger.ms

Answer

linger.ms specifies the delay a producer adds before sending a batch, allowing more records to accumulate.

Question 2

What does setting `acks=all` mean for a Kafka producer?

Accepted Answer

The producer waits for acknowledgment from all in-sync replicas

Answer

acks=all (or acks=-1) requires the leader to wait for the full set of in-sync replicas to acknowledge the record.

Question 3

Which consumer configuration determines how frequently the consumer offsets are committed automatically?

Accepted Answer

auto.commit.interval.ms

Answer

auto.commit.interval.ms sets the frequency (in milliseconds) at which the consumer's offsets are committed when enable.auto.commit is true.

Question 4

What is the purpose of the `max.poll.records` consumer configuration?

Accepted Answer

Limits the maximum number of records returned in a single poll() call

Answer

max.poll.records controls the maximum number of records that a single call to poll() will return.

Question 5

When a Kafka producer sends a message without a key, how is the partition selected?

Accepted Answer

Round-robin across available partitions

Answer

Without a key, the default partitioner distributes messages in round-robin fashion across all available partitions.

Apache Kafka Practice Test