What will be the output of this command if the topic test-topic has 3 messages: kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test-topic --from-beginning --max-messages 2?
medium📝 Predict Output Q13 of 15
Kafka - Basics and Event Streaming
What will be the output of this command if the topic test-topic has 3 messages: kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test-topic --from-beginning --max-messages 2?
AIt will print all 3 messages from <code>test-topic</code> and then exit.
BIt will print the first 2 messages from <code>test-topic</code> and then exit.
CIt will print no messages because <code>--max-messages</code> is ignored.
DIt will print only the last message from <code>test-topic</code>.
Step-by-Step Solution
Solution:
Step 1: Understand the --max-messages option
The --max-messages 2 option limits the consumer to read only 2 messages before exiting.
Step 2: Analyze the command behavior
The command reads from the beginning and stops after printing 2 messages, even though the topic has 3 messages.
Final Answer:
It will print the first 2 messages from test-topic and then exit. -> Option B
Quick Check:
--max-messages limits output count [OK]
Quick Trick:--max-messages limits how many messages are consumed [OK]
Common Mistakes:
Assuming all messages will be printed ignoring --max-messages
Thinking --max-messages prints last messages only
Confusing --from-beginning with consuming only latest messages
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