Quick Answer
The answer is Azure Event Grid, Azure Functions, and Azure Cosmos DB. This trio forms a serverless event-driven data pipeline because Event Grid captures blob creation events from Azure Blob Storage, instantly triggering an Azure Function that executes your custom transformation code, and the Cosmos DB output binding writes the processed data directly into the database without managing any servers. On the DP-203 exam, this scenario tests your understanding of native Azure integrations for real-time, event-driven architectures—a common pattern for streaming ingestion and transformation. A frequent trap is choosing Azure Batch for its compute power or Logic Apps for its workflow designer, but remember: Batch is for batch parallel processing, not event triggers, and Logic Apps is a low-code orchestrator, not a custom code runner. For a quick memory hook, think “Event triggers, Function transforms, Cosmos stores”—the three-step serverless pipeline that the exam loves to validate.
This DP-203 practice question tests your understanding of develop data processing. 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.
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?
Azure Functions
Functions can be triggered by Blob events and run custom code.
Azure Cosmos DB output binding (with Azure Functions)
Functions can write to Cosmos DB using the binding.
Azure Batch
Why wrong: Batch is not event-driven; requires job scheduling.
Azure Event Grid
Event Grid routes Blob events to Azure Functions.
Azure Logic Apps
Why wrong: Logic Apps are for workflows, not custom code execution.
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 Functions
Options A, C, and E 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 is wrong because Azure Batch is for large-scale parallel computing, not event-driven triggers. Option D is wrong because Azure Logic Apps is more for orchestration, not custom code execution.
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 Functions
Why this is correct
Functions can be triggered by Blob events and run custom code.
Related concept
Read the scenario before looking for a memorised answer.
Azure Cosmos DB output binding (with Azure Functions)
Why this is correct
Functions can write to Cosmos DB using the binding.
Related concept
Read the scenario before looking for a memorised answer.
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.
Related concept
Read the scenario before looking for a memorised answer.
Azure Logic Apps
Why it's wrong here
Logic Apps are for workflows, not custom code execution.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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 DP-203 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Develop data processing — This question tests Develop data processing — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Functions — Options A, C, and E 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 is wrong because Azure Batch is for large-scale parallel computing, not event-driven triggers. Option D is wrong because Azure Logic Apps is more for orchestration, not custom code execution.
Identify which DP-203 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
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.
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