DP-203 Develop data processing Practice Question
Which THREE Azure services can you use together to build a serverless, event-driven data processing pipeline that ingests data from Azure Blob Storage, transforms it using custom code, and loads it into Azure Cosmos DB?
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 Functions
Options A, B, and D are correct. Azure Functions can be triggered by Blob Storage events to run custom code, and the output can be written to Cosmos DB via the Cosmos DB output binding (option B). Azure Event Grid (option D) enables event-driven triggers for the pipeline. Option C (Azure Batch) is wrong because it is designed for large-scale parallel computing, not event-driven triggers. Option E (Azure Logic Apps) is wrong because it is more for workflow orchestration with connectors, not custom code execution.
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 Functions
Why this is correct
Functions can be triggered by Blob events and run custom code.
- ✓
Azure Cosmos DB output binding (with Azure Functions)
Why this is correct
Functions can write to Cosmos DB using the binding.
- ✗
Azure Batch
Why it's wrong here
Batch is not event-driven; requires job scheduling.
- ✓
Azure Event Grid
Why this is correct
Event Grid routes Blob events to Azure Functions.
- ✗
Azure Logic Apps
Why it's wrong here
Logic Apps are for workflows, not custom code execution.
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 |
Go deeper
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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.