Describe the Apache Kafka Queueing System and Architecture DATA-ENGINEERING-OPTIMIZE Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A financial services firm is deploying a Kafka cluster to handle transaction events. They need to ensure that the system remains available even if an entire rack of servers fails, and they want to minimize the risk of data loss. The cluster currently has 6 brokers, and the topic 'transactions' is configured with a replication factor of 3. What is the minimum number of in-sync replicas (min.insync.replicas) that should be configured to achieve the stated availability and durability goals?

   • A0
   • B1
   • C2
   • D3
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A Kafka consumer is configured with `enable.auto.commit=true` and `auto.commit.interval.ms=5000`. The consumer processes a batch of messages and then crashes before the next auto-commit. What is the likely outcome?

   • AAll messages in the batch will be processed exactly once.
   • BThe broker will automatically adjust the offset to avoid duplicates.
   • CSome messages may be re-processed after the consumer restarts.
   • DThe consumer will skip the uncommitted messages.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which scenario is a typical use case for Kafka in an IoT environment?

   • ARunning batch ETL jobs on a nightly schedule.
   • BIngesting high-volume sensor data from many devices in real time.
   • CStoring relational data for a transactional database.
   • DProviding a user interface for device management.
   Reveal Solution Discussion Select an answer first
5. 14application · easy

   A Kafka cluster has 3 brokers. A topic is created with a replication factor of 2 and 4 partitions. How many replicas will be created in total for this topic?

   • A4 replicas
   • B6 replicas
   • C12 replicas
   • D8 replicas
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6. 15foundation · easy

   Which Kafka component is a logical container that holds messages of a specific type and is divided into partitions?

   • AConsumer
   • BBroker
   • CProducer
   • DTopic
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