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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
1. What is accomplished by producing data to a topic with a message key?
A) Kafka brokers allow you to add more partitions to a given topic, without impacting the data flow for existing keys.
B) It provides a mechanism for encrypting messages at the partition level to ensure secure data transmission.
C) Messages with the same key are routed to a deterministically selected partition, enabling order guarantees within that partition.
D) Consumers can filter messages in real time based on the message key without processing unrelated messages.
2. You create a producer that writes messages about bank account transactions from tens of thousands of different customers into a topic.
Your consumers must process these messages with low latency and minimize consumer lag Processing takes ~6x longer than producing Transactions for each bank account must be processed in orderWhich strategy should you use?
A) Use a combination of the bank account number and the transaction timestamp as the message key.
B) Use the timestamp of the message's arrival as its key.
C) Use a unique identifier such as a universally unique identifier (UUID) as the message key.
D) Use the bank account number found in the message as the message key.
3. Your Kafka cluster has five brokers. The topic t1 on the cluster has:
Two partitions
Replication factor = 4
min.insync.replicas = 3You need strong durability guarantees for messages written to topic t1.You configure a producer acks=all and all the replicas for t1 are in-sync.How many brokers need to acknowledge a message before it is considered committed?
A) 3
B) 5
C) 2
D) 4
4. (You are writing lightweight XML messages to a Kafka topic named userinfo.
Which format should you use for the value field?)
A) StringSerializer
B) XmlSerializer
C) VoidSerializer
D) ByteSerializer
5. You are building a system for a retail store selling products to customers.
Which three datasets should you model as a GlobalKTable?
(Select three.)
A) Inventory of products at a warehouse
B) All purchases at a retail store occurring in real time
C) Customer profile information
D) Catalog of products
E) Log of payment transactions
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: D | Question # 3 Answer: A | Question # 4 Answer: A | Question # 5 Answer: A,C,D |
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