DP-203 Design and implement data storage Practice Question
A company wants to ingest streaming data from IoT devices into Azure for real-time analytics. The data must be available for immediate querying and also stored long-term in a cost-effective format. Which Azure service should be used as the primary ingestion endpoint?
⚠ Common exam trap
A common mix-up: candidates confuse Azure Blob Storage or Data Lake Storage as ingestion endpoints because they are cost-effective for storage, but they lack the real-time streaming capabilities and event-ordering guarantees that Event Hubs provides for immediate querying.
Answer choices
Why each option matters
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 primary ingestion endpoint for streaming IoT data because it is a fully managed, real-time data ingestion service optimized for high-throughput, low-latency event streaming. It can ingest millions of events per second from IoT devices and integrates natively with Azure Stream Analytics and other analytics services for immediate querying, while also supporting long-term retention via Event Hubs Capture to cost-effective storage like Azure Blob Storage or Data Lake Storage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure SQL Database
Why it's wrong here
Not designed for high-velocity streaming data.
- ✓
Azure Event Hubs
Why this is correct
Optimized for high-throughput streaming ingestion.
- ✗
Azure Data Lake Storage Gen2
Why it's wrong here
Not a real-time ingestion endpoint; used for storage.
- ✗
Azure Blob Storage
Why it's wrong here
Used for batch storage, not real-time streaming.
Quick reference
Azure Blob Storage Tier Comparison
| Tier | Storage Cost | Retrieval Cost | Latency | Use Case |
|---|---|---|---|---|
| Hot | Highest | Lowest | Immediate | Active data, frequent reads |
| Cool | Lower | Higher | Immediate | Data accessed < once / month |
| Cold | Lower still | Higher | Immediate | Data accessed < once / quarter |
| Archive | Lowest | Highest + rehydration delay | Hours | Long-term compliance retention |
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-203 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 DP-203 exam.