Confluent CCDAK Exam Practice Test Instant Access

Question 1

In Avro, adding an element to an enum without a default is a __ schema evolution

Abreaking

Bfull

Cbackward

Dforward

Answer : A

Since Confluent 5.4.0, Avro 1.9.1 is used. Since default value was added to enum complex type , the schema resolution changed from:

(<1.9.1) if both are enums:** if the writer's symbol is not present in the reader's enum, then an error is signalled. **(>=1.9.1) if both are enums:

if the writer's symbol is not present in the reader's enum and the reader has a default value, then that value is used, otherwise an error is signalled.

Question 2

How will you set the retention for the topic named my-topic to 1 hour?

ASet the broker config log.retention.ms to 3600000

BSet the consumer config retention.ms to 3600000

CSet the topic config retention.ms to 3600000

DSet the producer config retention.ms to 3600000

Answer : C

retention.ms can be configured at topic level while creating topic or by altering topic. It shouldn't be set at the broker level (log.retention.ms) as this would impact all the topics in the cluster, not just the one we are interested in

Question 3

A consumer has auto.offset.reset=latest, and the topic partition currently has data for offsets going from 45 to 2311. The consumer group never committed offsets for the topic before. Where will the consumer read from?

Aoffset 2311

Boffset 0

Coffset 45

Dit will crash

Answer : A

Latest means that data retrievals will start from where the offsets currently end

Question 4

Where are KSQL-related data and metadata stored?

AKafka Topics

BZookeeper

CPostgreSQL database

DSchema Registry

Answer : A

metadata is stored in and built from the KSQL command topic. Each KSQL server has its own in-memory version of the metastore.

Question 5

What is a generic unique id that I can use for messages I receive from a consumer?

Atopic + partition + timestamp

Btopic + partition + offset

Ctopic + timestamp

Answer : B

(Topic,Partition,Offset) uniquely identifies a message in Kafka

Question 6

What is not a valid authentication mechanism in Kafka?

ASASL/GSSAPI

BSASL/SCRAM

CSAML

DSSL

Answer : C

Learn more about security herehttps://kafka.apache.org/documentation/#security

Question 7

You are building a consumer application that processes events from a Kafka topic. What is the most important metric to monitor to ensure real-time processing?

AUnderReplicatedPartitions

Brecords-lag-max

CMessagesInPerSec

DBytesInPerSec

Answer : B

This metric shows the current lag (number of messages behind the broker)

Confluent CCDAK Certified Developer for Apache Kafka Exam Practice Test