[Solved] Given the following code snippet, what will be the output if the consumer seeks to offset 5 and reads one message? consumer.assign(Collections.singleton(topicPartition)); consumer.... | Kafka

Kafka - Consumers

Given the following code snippet, what will be the output if the consumer seeks to offset 5 and reads one message?

consumer.assign(Collections.singleton(topicPartition));
consumer.seek(topicPartition, 5);
ConsumerRecords records = consumer.poll(Duration.ofMillis(1000));
for (ConsumerRecord record : records) {
    System.out.println(record.offset());
    break;
}

A5

B0

C1

DException thrown

Step-by-Step Solution

Solution:

Step 1: Understand seek behavior
Calling seek sets the consumer's position to offset 5 in the assigned partition.
Step 2: Poll and print offset
The poll fetches messages starting at offset 5; printing record.offset() outputs 5.
Final Answer:
5 -> Option A
Quick Check:
seek to 5 then poll = offset 5 [OK]

Quick Trick: seek sets start offset; first polled message offset matches [OK]

Common Mistakes:

Assuming poll starts from offset 0
Expecting offset 1 instead of 5
Thinking seek causes an exception

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More Kafka Quizzes

Given the following code snippet, what will be the output if the consumer seeks to offset 5 and reads one message?

Step 1: Understand seek behavior

Step 2: Poll and print offset

Final Answer:

Quick Check:

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