Configuration best practices in Kafka - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the bootstrap servers for Kafka producer configuration.

Kafka

props.put("bootstrap.servers", [1]);

Drag options to blanks, or click blank then click option'

A"broker:2182"

B"127.0.0.1"

C"localhost:9092"

D"kafka:2181"

Attempts:

3 left

💡 Hint

Common Mistakes

Using zookeeper port 2181 instead of Kafka broker port 9092.

Omitting the port number.

Using an IP without port.

The bootstrap.servers property requires the Kafka broker address with port, typically localhost:9092 for local setups.

2fill in blank

medium

Complete the code to set the key serializer class for Kafka producer.

Kafka

props.put("key.serializer", [1]);

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A"org.apache.kafka.common.serialization.StringDeserializer"

B"org.apache.kafka.common.serialization.StringSerializer"

C"org.apache.kafka.common.serialization.ByteArraySerializer"

D"org.apache.kafka.common.serialization.IntegerDeserializer"

Attempts:

3 left

💡 Hint

Common Mistakes

Using deserializer class instead of serializer.

Using wrong serializer for key type.

The key.serializer must be a serializer class, here StringSerializer is correct for string keys.

3fill in blank

hard

Fix the error in setting the 'acks' configuration for Kafka producer to ensure all replicas acknowledge.

Kafka

props.put("acks", [1]);

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A"all"

B"0"

C"1"

D"-1"

Attempts:

3 left

💡 Hint

Common Mistakes

Using '1' which waits only for leader acknowledgement.

Using '0' which disables acknowledgement.

Setting 'acks' to 'all' ensures the leader waits for all replicas to acknowledge the record.

4fill in blank

hard

Fill both blanks to configure the producer retries and retry backoff time.

Kafka

props.put("retries", [1]);
props.put("retry.backoff.ms", [2]);

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A3

B100

C0

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Setting retries to 0 disables retries.

Setting retry.backoff.ms too high causes delays.

Setting retries to 3 allows 3 retry attempts, and retry.backoff.ms to 100 sets 100ms delay between retries.

5fill in blank

hard

Fill all three blanks to configure the consumer group id, enable auto commit, and set auto commit interval.

Kafka

props.put("group.id", [1]);
props.put("enable.auto.commit", [2]);
props.put("auto.commit.interval.ms", [3]);

Drag options to blanks, or click blank then click option'

A"my-group"

Btrue

C1000

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using false for enable.auto.commit disables auto commit.

Setting auto.commit.interval.ms too low or too high affects performance.

group.id identifies the consumer group, enable.auto.commit true enables auto commit, and auto.commit.interval.ms sets commit interval to 1000ms.