The answer is to use a Self-Hosted Integration Runtime. This is correct because the self-hosted IR acts as a dedicated gateway installed on your on-premises network, enabling Azure Data Factory to securely connect to resources like SQL Server that sit behind a firewall, whereas the default Azure IR cannot traverse on-premises boundaries. On the Microsoft Azure Data Engineer Associate DP-203 exam, this question tests your understanding of ADF on-premises data connectivity and the specific role of the self-hosted IR in hybrid scenarios. A common trap is assuming an Azure IR or a VPN alone solves the connectivity issue, but the self-hosted IR is the required bridge for direct data transfer from on-premises sources. Remember the memory tip: "Self-hosted for on-premises, Azure IR for cloud-only"—if the data source is inside your network, you must deploy a self-hosted IR.
DP-203 Develop data processing Practice Question
This DP-203 practice question tests your understanding of develop data processing. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Your team is using Azure Data Factory to orchestrate a data pipeline that copies data from an on-premises SQL Server to Azure Blob Storage. The pipeline runs successfully during testing. However, after moving to production, you notice that the pipeline fails intermittently with connectivity errors. You need to ensure reliable data transfer. What should you implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Self-Hosted Integration Runtime
Option B is correct because a self-hosted integration runtime provides a gateway for on-premises connectivity. Option A is wrong because Azure IR cannot access on-premises networks. Option C is wrong because VPN is not a direct solution for data factory connectivity. Option D is wrong because PolyBase is for loading into Synapse, not for connectivity.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use Azure Integration Runtime (IR)
Why it's wrong here
Azure IR runs in the cloud and cannot directly access on-premises data sources.
✗
Use PolyBase for data transfer
Why it's wrong here
PolyBase is a technology for querying external data sources, not for data transfer.
✗
Configure Azure VPN Gateway
Why it's wrong here
VPNGateway is for site-to-site connectivity, not for ADF connectivity directly.
✓
Use Self-Hosted Integration Runtime
Why this is correct
Self-hosted IR acts as a gateway connecting ADF to on-premises resources.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
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.
Develop data processing — This question tests Develop data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Self-Hosted Integration Runtime — Option B is correct because a self-hosted integration runtime provides a gateway for on-premises connectivity. Option A is wrong because Azure IR cannot access on-premises networks. Option C is wrong because VPN is not a direct solution for data factory connectivity. Option D is wrong because PolyBase is for loading into Synapse, not for connectivity.
What should I do if I get this DP-203 question wrong?
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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