Quick Answer
The answer is Azure Event Hubs and Azure Stream Analytics. This combination is correct because Event Hubs provides the high-throughput, low-latency ingestion layer capable of handling millions of events per second from IoT devices, while Stream Analytics natively integrates to perform complex event processing (CEP) on that streaming telemetry data, enabling real-time pattern matching, aggregation, and alerting for both live dashboards and durable historical storage. On the AZ-305 exam, this pairing tests your understanding of designing a high-velocity IoT telemetry pipeline that balances real-time analytics with long-term retention; a common trap is choosing Azure IoT Hub instead of Event Hubs for pure telemetry ingestion, but remember that IoT Hub is for device management and bidirectional communication, whereas Event Hubs is optimized for massive-scale event streaming. For a memory tip, think of Event Hubs as the “firehose” and Stream Analytics as the “brain” that processes the deluge—together they handle velocity and complexity without a single bottleneck.
This AZ-305 practice question tests your understanding of design data storage solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is designing a data storage solution for its IoT devices that generate telemetry data. The data is ingested at high velocity (millions of events per second) and must be stored for real-time dashboards and historical analysis. The solution must also support complex event processing and alerting. Which two Azure services should the company use together? (Choose two.)
Azure IoT Hub
Why wrong: More suited for device management, not as high-throughput.
Azure Event Hubs
High-throughput event ingestion.
Azure Stream Analytics
Real-time stream processing and alerting.
Azure Synapse Analytics
Why wrong: Not for real-time stream processing.
Azure Data Lake Storage Gen2
Why wrong: Storage only, no real-time processing.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Event Hubs
Azure Event Hubs is the correct choice because it is a high-throughput data ingestion service designed to handle millions of events per second from IoT devices, providing low-latency, durable event capture for real-time dashboards and historical analysis. Azure Stream Analytics is the correct companion service because it natively integrates with Event Hubs to perform complex event processing (CEP), such as pattern matching, aggregation, and alerting, on the streaming telemetry data in real time.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure IoT Hub
Why it's wrong here
More suited for device management, not as high-throughput.
Azure Event Hubs
Why this is correct
High-throughput event ingestion.
Related concept
Read the scenario before looking for a memorised answer.
Azure Stream Analytics
Why this is correct
Real-time stream processing and alerting.
Related concept
Read the scenario before looking for a memorised answer.
Azure Synapse Analytics
Why it's wrong here
Not for real-time stream processing.
Azure Data Lake Storage Gen2
Why it's wrong here
Storage only, no real-time processing.
Common exam traps
The trap here is that candidates often confuse Azure IoT Hub with Event Hubs, assuming IoT Hub is the default for all IoT data ingestion, but IoT Hub is for device management and lower-throughput scenarios, while Event Hubs is the correct choice for high-velocity, multi-million-events-per-second telemetry ingestion.
Detailed technical explanation
Event Hubs uses a partitioned consumer model with AMQP 1.0 and HTTPS protocols, enabling parallel processing of millions of events per second across multiple consumer groups. Stream Analytics uses a temporal SQL-like query language to define windowed aggregations, pattern matches (e.g., missing events), and alert conditions, and it can output results to multiple sinks (e.g., Power BI, SQL Database) simultaneously. In a real-world scenario, IoT telemetry from thousands of sensors can be ingested into Event Hubs, then Stream Analytics can detect anomalies like temperature spikes and trigger alerts within seconds.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design data storage solutions — study guide chapter
Learn the concepts, then practise the questions
Design data storage solutions practice questions
Targeted practice on this topic area only
All AZ-305 questions
999 questions across all exam domains
Microsoft Azure Solutions Architect Expert AZ-305 study guide
Full concept coverage aligned to exam objectives
AZ-305 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise AZ-305 questions linked to Design identity, governance, and monitoring solutions.
Practise AZ-305 questions linked to Design data storage solutions.
Practise AZ-305 questions linked to Design business continuity solutions.
Practise AZ-305 questions linked to Design infrastructure solutions.
Practise AZ-305 questions linked to SAA-C03 VPC.
Practise AZ-305 questions linked to SAA-C03 S3 lifecycle policy questions.
Practise AZ-305 questions linked to SAA-C03 RDS Multi-AZ questions.
Practise AZ-305 questions linked to SAA-C03 IAM policy.
Practise AZ-305 questions linked to SAA-C03 Route 53 failover questions.
Practise AZ-305 questions linked to SAA-C03 CloudFront.
Practise AZ-305 questions linked to SAA-C03 NAT gateway questions.
Practise AZ-305 questions linked to SAA-C03 VPC endpoint questions.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Event Hubs — Azure Event Hubs is the correct choice because it is a high-throughput data ingestion service designed to handle millions of events per second from IoT devices, providing low-latency, durable event capture for real-time dashboards and historical analysis. Azure Stream Analytics is the correct companion service because it natively integrates with Event Hubs to perform complex event processing (CEP), such as pattern matching, aggregation, and alerting, on the streaming telemetry data in real time.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 24, 2026
This AZ-305 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-305 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.