DP-203 Develop data processing Practice Question
Which TWO options are correct about using Azure Stream Analytics for real-time data processing?
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
✓
You can join streaming data with static reference data for enrichment.
Correct: A (reference data joins for enrichment) and B (windowing functions for time-based aggregations). Option C is wrong because while Stream Analytics supports many output sinks, not all Azure data stores are supported out-of-the-box; some require custom code or connectors. Option D is wrong because Stream Analytics provides at-least-once processing semantics, not exactly-once; exactly-once depends on the sink configuration and output adapter. Option E is incorrect because Stream Analytics natively supports custom JavaScript functions for complex transformations, but it does not natively support C# functions; C# functions require integration with Azure Functions, making this option misleading.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
You can join streaming data with static reference data for enrichment.
Why this is correct
Reference data joins are a key feature of Stream Analytics.
- ✓
Stream Analytics supports windowing functions like Tumbling, Hopping, and Sliding windows natively.
Why this is correct
These windowing functions are built-in.
- ✗
Stream Analytics can output to any Azure data store without custom code.
Why it's wrong here
Output to some data stores may require custom adapters or Azure Functions.
- ✗
Stream Analytics guarantees exactly-once processing semantics.
Why it's wrong here
Stream Analytics provides at-least-once semantics; exactly-once depends on sink.
- ✗
You can use custom JavaScript or C# functions for complex transformations.
Why it's wrong here
Incorrect: While Stream Analytics supports custom JavaScript functions, C# functions are not natively supported and require integration with Azure Functions, so this option is misleading.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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Written by Johnson Ajibi, MSc IT Security
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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.