Confluent Fundamentals Accreditation

Kafka uses a (blank) model for consumers.

• Push
• Publish
• Subscribe
• Enrollment

Load balancing of Kafka Clients across multiple brokers is accomplished using

• Partitions
• Replicas
• Offsets
• Connectors

When writing a message with no key to a Kafka topic and using the default partitioner, all messages will be written

• To the same partition of the topic
• To the same segment file of the topic
• In a round robin method across all partition of the topic
• Messages without keys are not allowed in Kafka

Kafka is well suited for (blank) types of operations

• Batch
• Real Time
• Streaming
• All of the above

Which of the following are benefits of event stream processing over batch processing? (Pick two)

• Compute results with low latency in near real-time
• Execute periodic (daily, weekly, monthly) jobs
• Perform flexible search and ad-hoc queries
• Compute efficiently over large, continuous, unbounded data sets

Which of the following technologies can be used to perform event stream processing? (Pick two)

• Confluent Schema Registry
• Apache Kafka Streams
• Confluent KSQL
• Confluent Replicator

Which of the following use cases would benefit most from continuous event stream processing? (Pick three)

• Fraud Detection
• Context-aware product recommendations for e-commerce
• End of the day financial settlement processing
• Log monitoring/application fault detection

What is the default maximum message size a Kafka broker can receive? (Pick one)

• 1,048,588 bytes
• 100 bytes
• 10,000 bytes
• 254,200 bytes

Which events will initiate the consumer rebalancing? (Pick three)

• Consumers joins the consumer group
• A new producer starts writing messages to the topic in question
• A consumer leaves the group
• A new broker is added to the cluster
• Partitions are added to the topic

Which actions are undertaken by the controller in case it detects the failure of a broker (which was leader for some partitions)? (Pick three)

• Controller waits for a new leader to be nominated by ZooKeeper
• Controller selects a new leader and updates the ISR list
• Controller persists the new leader and ISR list to ZooKeeper
• Controller sends the new leader and ISR list changes to all brokers

What is the relationship between topics and partitions: (Pick one)

• A topic always has one partition
• A topic may have more than one partition
• A partition always has one topic
• A partition may have more than one topic
• There is no relationship between topics and partitions

Kafka message Offset numbers: (Pick one)

• Are unique within a topic
• Are reused after messages are deleted
• Are unique within a partition
• Can be non sequential in the log with multiple producers
• Are transparent to brokers

Messages produced to a Kafka cluster are stored in the form of: (Pick one)

• JSON data
• Plain text
• Bytes
• Sequence Files

Which of the following are true of the Confluent Schema Registry? (Pick three)

• It provides a serving layer for your metadata and a RESTful interface for storing and retrieving Avro, Protobuf, or JSON Schema
• It provides serializers that plug into Apache Kafka clients, which handle schema storage and retrieval of Kafka messages sent in Avro format.
• Increases the size of messages by adding the schema in the message.
• It reduces the overhead with kafka messages by separating the schema and storing and ID.

Which of the following might be essential sources of events in Kafka?

• IoT devices
• Banking Transactions
• Web Logs
• Database updates
• All of the above

Brokers make up a Kafka cluster. Brokers are networked together and act as a single cluster and could run in which of the following? (Select three)

• VM
• Containers
• Physical Machines
• Network File System

Your consumer application could be doing many things. Select any two from below that is typical of consumer applications. (Select two)

• Creating Reports
• Updating Dashboards
• Publishing data to the brokers
• Batching data to send to Kafka

Kafka uses Apache Zookeeper to manage consensus. Zookeeper acts as a distributed consensus manager. Zookeeper stores information about :

• ACLs
• Failure detection and recovery
• Cluster Management
• Controllers
• All of the above

The fundamental data structure that kafka uses to store its messages is called a Log. Which of the following are characteristics of a log. (Select three)

• Can have multiple consumers reading from the log
• Logs are immutable
• Multiple producers can write to the logs
• Only one consumer at a time can read from the log

Logs store data. Each event record is written at a particular offset in the log. The default retention period for data in the logs is (blank).

• One week
• One month
• One day
• None of the above

Which of the following are true of timestamps in Kafka messages. (select two)

• Timestamps are optional in the message
• Every message has a timestamp
• If you don’t have a time stamp, one will be provided for you--you will get message creation time
• You must always use the current time in the message

When you produce data to a Kafka cluster, your data will be sent to the

• Controller
• Zookeeper
• Broker that is the Leader of the Partition
• Followers in the cluster

What are the levels of data, or message, durability provided by Kafka? (Pick one)

• At least once delivery guarantees
• Exactly once delivery guarantees
• At most once delivery guarantees
• All of the above