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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. What happens when broker.rack configuration is provided in broker configuration in Kafka cluster?

A) Replicas for a partition are spread across different racks
B) Replicas for a partition are placed in the same rack
C) You can use the same broker.id as long as they have different broker.rack configuration
D) Each rack contains all the topics and partitions, effectively making Kafka highly available

2. You are sending messages with keys to a topic. To increase throughput, you decide to increase the number of partitions of the topic. Select all that apply.

A) All the existing records will get rebalanced among the partitions to balance load
B) New records may get written to a different partition
C) New records with the same key will get written to the partition where old records with that key were written
D) Old records will stay in their partitions

3. What isn't a feature of the Confluent schema registry?

A) Enforce compatibility rules
B) Store avro data
C) Store schemas

4. What is ISR in Apache Kafka?

A) "in-sync" remote access
B) "in-sync" retention
C) "in-sync" resource
D) "in-sync" replicas

5. A stream processing application is tracking the user activity of online shopping carts. The application tracks items added to the cart, items removed from the cart, and items ordered from the cart throughout the day for each user.
You need to capture the data to identify possible periods of user inactivity.
Which type of Kafka Streams window should you use?

A) Tumbling
B) Session
C) Sliding
D) Hopping

Solutions: