Event Hubs for streaming data in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ service_behavior

intermediate

Event Hub Partition Behavior

You have an Azure Event Hub with 4 partitions. You send 1000 events with the same partition key. How many partitions will these events be distributed across?

A Events will be evenly distributed across all 4 partitions.

B All 1000 events will go to exactly 1 partition.

C Events will be randomly distributed across 2 partitions.

D Events will be distributed across 3 partitions based on load.

💡 Hint

Think about how partition keys affect event routing.

Events with the same partition key always go to the same partition to preserve order.

❓ Architecture

intermediate

Choosing Event Hub Throughput Units

You expect to send 20 MB per second of data to an Event Hub. Each throughput unit supports 1 MB/s ingress. How many throughput units should you provision?

A 5 throughput units

B 10 throughput units

C 1 throughput unit

D 20 throughput units

💡 Hint

Each throughput unit supports 1 MB/s ingress.

You need one throughput unit per 1 MB/s of ingress, so 20 MB/s requires 20 units.

❓ security

advanced

Securing Event Hub Access

You want to allow a service to send events to your Event Hub but not read from it. Which Azure role should you assign to the service's managed identity?

A Azure Event Hubs Contributor

B Azure Event Hubs Data Receiver

C Azure Event Hubs Data Sender

D Azure Event Hubs Data Owner

💡 Hint

Look for the role that only allows sending events.

The 'Azure Event Hubs Data Sender' role allows sending events but not reading them.

❓ Configuration

advanced

Event Hub Capture Configuration

You configure Event Hub Capture to save data to Azure Blob Storage every 5 minutes or 100 MB, whichever comes first. What happens if 100 MB is reached before 5 minutes?

A Capture triggers immediately when 100 MB is reached, before 5 minutes.

B Capture waits full 5 minutes regardless of size.

C Capture triggers only after 5 minutes even if size is larger.

D Capture triggers randomly, ignoring size and time.

💡 Hint

Think about the 'whichever comes first' condition.

Capture triggers as soon as either condition is met, so hitting 100 MB triggers capture immediately.

✅ Best Practice

expert

Optimizing Event Hub Consumer Group Usage

You have multiple independent applications reading from the same Event Hub. What is the best practice to ensure each application reads all events without interfering with others?

A Assign each application its own consumer group.

B Share a single consumer group among all applications.

C Use no consumer groups and read directly from partitions.

D Use the same consumer group but different partitions per app.

💡 Hint

Consider how consumer groups isolate read positions.

Each consumer group maintains its own read position, so separate groups prevent interference.