AZ-204 Azure Messaging & Event-driven Solutions 2

Question 1

What is the key difference between an Azure Service Bus queue and a topic?

Accepted Answer

Topics support multiple subscriptions allowing multiple consumers to receive copies of each message, while queues deliver each message to exactly one consumer

Answer

Queues support multiple publishers while topics support only one publisher

Answer

Queues have higher throughput limits than topics

Answer

Topics only support AMQP while queues support both HTTP and AMQP

Question 2

Which Azure SDK method should you call to settle a received Service Bus message and confirm it was successfully processed, preventing redelivery?

Accepted Answer

CompleteMessageAsync()

Answer

DeleteMessageAsync()

Answer

AcknowledgeMessageAsync()

Answer

RemoveMessageAsync()

Question 3

What is the purpose of Azure Event Hubs Capture?

Accepted Answer

To automatically archive streaming data to Azure Blob Storage or Azure Data Lake Storage

Answer

To filter incoming events based on property rules

Answer

To create point-in-time snapshots of partition state

Answer

To replicate events to a secondary Event Hubs namespace

Question 4

Which Service Bus feature allows you to atomically send or receive messages across multiple queues and topics in a single all-or-nothing operation?

Accepted Answer

Transactions

Answer

Message batching

Answer

Message sessions

Answer

Scheduled delivery

Question 5

In Azure Event Hubs, what happens when events are published with the same partition key?

Accepted Answer

A hash of the partition key routes all matching events consistently to the same partition

Answer

They are distributed randomly to balance load across partitions

Answer

They are stored in a dedicated partition named after the key

Answer

The SDK selects a partition based on current availability

Question 6

How does Azure Event Grid handle event delivery failures to a subscriber endpoint?

Accepted Answer

Event Grid uses exponential backoff retries for up to 24 hours and supports optional dead-lettering to a storage account

Answer

Events are permanently lost after the first delivery failure

Answer

Event Grid retries exactly 3 times with a fixed 30-second delay between attempts

Answer

Events are stored in a temporary queue for 1 hour before being discarded

Question 7

Which C# class in the Azure.Messaging.ServiceBus SDK is used to send messages to a Service Bus queue or topic?

Accepted Answer

ServiceBusSender

Answer

ServiceBusClient

Answer

ServiceBusProcessor

Answer

ServiceBusReceiver