Confluent CCDAK Realistic New Exam Price Free PDF Quiz

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Confluent CCDAK Exam Syllabus Topics:

Section	Objectives
Kafka Ecosystem and Confluent Platform	- ksqlDB and connectors 1. Stream querying concepts 2. Kafka Connect basics - Schema Registry 1. Avro, Protobuf, JSON Schema usage
Kafka Fundamentals	- Kafka architecture and core concepts 1. Brokers, topics, partitions 2. Replication and fault tolerance - Data flow in Kafka 1. Offset management 2. Producer and consumer model
Kafka Streams and Processing	- Event processing patterns 1. Exactly-once semantics 2. Windowing and aggregation - Kafka Streams API 1. Stream processing fundamentals 2. Stateful vs stateless processing
Kafka Producers and Consumers	- Producer API 1. Reliability and acknowledgments 2. Serialization and partitioning strategies - Consumer API 1. Consumer groups 2. Rebalancing and offset commits

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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions (Q17-Q22):

NEW QUESTION # 17
You want to connect with username and password to a secured Kafka cluster that has SSL encryption.
Which properties must your client include?

A. security.protocol=SASL_SSL
sasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule required username='myUser' password='myPassword';
B. security.protocol=PLAINTEXT
sasl.jaas.config=org.apache.kafka.common.security.ssl.TlsLoginModule required username='myUser' password='myPassword';
C. security.protocol=SASL_PLAINTEXT
sasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule required username='myUser' password='myPassword';
D. security.protocol=SSL
sasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule required username='myUser' password='myPassword';

Answer: A

Explanation:
ForSASL/PLAIN authentication over SSL, the correct combination is:
* security.protocol=SASL_SSL
* sasl.jaas.config=...PlainLoginModule required username=... password=...
FromKafka Security Documentation:
"For SASL/PLAIN over SSL, configure security.protocol=SASL_SSL and provide login module configuration using sasl.jaas.config." Options B and D are incorrect because they do not pair the correct protocol with the authentication method.
Reference:Apache Kafka Security Configs > SASL_SSL, PLAIN mechanism

NEW QUESTION # 18
In Avro, adding a field to a record without default is a __ schema evolution

A. forward
B. breaking
C. full
D. backward

Answer: A

Explanation:
Clients with old schema will be able to read records saved with new schema.

NEW QUESTION # 19
You need to set alerts on key broker metrics to trigger notifications when the cluster is unhealthy.
Which are three minimum broker metrics to monitor?
(Select three.)

A. kafka.controller:type=KafkaController,name=LastCommittedRecordOffset
B. kafka.controller:type=KafkaController,name=ActiveControllerCount
C. kafka.controller:type=KafkaController,name=OfflinePartitionsCount
D. kafka.controller:type=ControllerStats,name=UncleanLeaderElectionsPerSec
E. kafka.controller:type=KafkaController,name=TopicsToDeleteCount

Answer: B,C,D

Explanation:
These three metrics are critical for cluster health:
* OfflinePartitionsCount: Indicates partitions without active leaders - a sign of broker failure.
* ActiveControllerCount: There should beexactly one active controller. A count # 1 signals controller failure.
* UncleanLeaderElectionsPerSec: Tracks leader elections where out-of-sync replicas were selected - risky for data loss.
FromKafka Monitoring Documentation:
"Offline partitions and unclean leader elections should trigger alerts. Also, ensure a single active controller is running."
* A is about topics pending deletion - not critical.
* E is a per-topic record metric, not broker-level.
Reference:Kafka Monitoring > Key JMX Metrics

NEW QUESTION # 20
A consumer wants to read messages from a specific partition of a topic. How can this be achieved?

A. Call assign() passing a Collection of TopicPartitions as the argument
B. Call subscribe() passing TopicPartition as the argument
C. Call subscribe(String topic, int partition) passing the topic and partition number as the arguments

Answer: A

Explanation:
assign() can be used for manual assignment of a partition to a consumer, in which case subscribe() must not be used. Assign() takes a collection of TopicPartition object as an argument https://kafka.apache.org/23/javadoc/org/apache/kafka/clients/consumer/KafkaConsumer.html#assign-java.util.Collection-

NEW QUESTION # 21
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. New records with the same key will get written to the partition where old records with that key were written
B. New records may get written to a different partition
C. All the existing records will get rebalanced among the partitions to balance load
D. Old records will stay in their partitions

Answer: B,D

Explanation:
Increasing the number of partition causes new messages keys to get hashed differently, and breaks the guarantee "same keys goes to the same partition". Kafka logs are immutable and the previous messages are not re-shuffled

NEW QUESTION # 22
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