Microsoft Certified: Azure Developer Associate Azure Messaging and Event-Driven Solutions 1 — Questions and Answers
Question 1: What is the key difference between Azure Service Bus queues and Azure Storage queues?
- Storage queues support larger messages
- Service Bus supports advanced messaging features like dead-lettering, sessions, and transactions (Correct answer)
- Storage queues have lower latency
- Service Bus queues are free tier only
Correct answer: Service Bus supports advanced messaging features like dead-lettering, sessions, and transactions
Service Bus provides enterprise messaging with dead-letter queues, message sessions, duplicate detection, and transactions not available in Storage queues.
Question 2: In Azure Service Bus, what feature ensures that only one consumer processes a related group of messages in order?
- Dead-letter queue
- Message lock
- Message sessions (Correct answer)
- Topic subscriptions
Correct answer: Message sessions
Message sessions (enabled per queue/subscription) group related messages by session ID and guarantee ordered, exclusive processing by one consumer at a time.
Question 3: What is the default Time-to-Live (TTL) for messages in an Azure Service Bus queue?
- 1 hour
- 1 day
- 14 days
- It is set to TimeSpan.MaxValue (no expiry by default) (Correct answer)
Correct answer: It is set to TimeSpan.MaxValue (no expiry by default)
By default, Service Bus messages have a TTL of `TimeSpan.MaxValue`, meaning they do not expire unless a custom TTL is set on the queue or message.
Question 4: Which Azure event service is best suited for high-throughput telemetry ingestion from IoT devices?
- Azure Event Grid
- Azure Service Bus
- Azure Event Hubs (Correct answer)
- Azure Notification Hubs
Correct answer: Azure Event Hubs
Azure Event Hubs is designed for high-throughput streaming of millions of events per second, making it ideal for telemetry and log ingestion.
Question 5: What protocol does Azure Event Hubs use that is compatible with Apache Kafka producers and consumers?
- AMQP 1.0
- MQTT
- Kafka Protocol (port 9093) (Correct answer)
- HTTP/2
Correct answer: Kafka Protocol (port 9093)
Event Hubs exposes a Kafka-compatible endpoint on port 9093, allowing existing Kafka clients to send and receive events without code changes.
Question 6: In Azure Event Grid, what resource subscribes to events from a source and routes them to a handler endpoint?
- Event publisher
- Event domain
- Event subscription (Correct answer)
- Topic filter
Correct answer: Event subscription
An event subscription defines the filter criteria and the destination endpoint (e.g., webhook, Function, or queue) that receives matching events.
Microsoft Certified: Azure Developer Associate Azure Messaging and Event-Driven Solutions 1
What is the key difference between Azure Service Bus queues and Azure Storage queues?