The answer is that the self-hosted integration runtime is not configured properly. This is the most likely cause because the error, SqlOperationFailed, occurs on the 'Source' side, indicating a connectivity breakdown between the Azure cloud service and your on-premises SQL Server. Since you have confirmed no firewall restrictions on the source server, the failure points directly to the integration runtime—the bridge required for hybrid data movement—being either missing, misconfigured, or unable to reach the on-premises network. On the DP-203 exam, this scenario tests your understanding of how Azure Synapse Pipelines handle on-premises data sources; a common trap is to assume the error is a SQL permission issue, but the error code itself signals a connection failure, not an authentication problem. Remember the mnemonic: "Source-side SQL fail? Check the IR trail."
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.
You are troubleshooting a Synapse Pipeline that runs a Copy activity from an on-premises SQL Server to Azure Synapse Dedicated SQL Pool. The pipeline fails with the error: 'Failure happened on 'Source' side. ErrorCode=SqlOperationFailed.' The on-premises SQL Server has no firewall restrictions. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Why wrong: Staging is optional and not required for basic copy operations; its absence would not cause a source-side error.
B
The destination table in Synapse has a different schema.
Why wrong: A schema mismatch would fail on the sink side, not the source side.
C
The SQL Server credentials in the linked service are incorrect.
Why wrong: Incorrect credentials would cause a login failure, but the error is generic 'SqlOperationFailed' and could be connectivity-related.
D
The self-hosted integration runtime is not configured properly.
A self-hosted integration runtime is required to connect from Azure to on-premises networks; misconfiguration is a common cause of source-side failures.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The self-hosted integration runtime is not configured properly.
The error indicates a failure on the source side. Since the on-premises SQL Server has no firewall restrictions, the most likely cause is that the self-hosted integration runtime is not installed or configured correctly, preventing connectivity from the cloud to the on-premises network. Option A is plausible but less likely given the error message. Option C is not a typical cause for a source-side error. Option D is about staging, which is not mentioned.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Staging is not enabled for the Copy activity.
Why it's wrong here
Staging is optional and not required for basic copy operations; its absence would not cause a source-side error.
✗
The destination table in Synapse has a different schema.
Why it's wrong here
A schema mismatch would fail on the sink side, not the source side.
✗
The SQL Server credentials in the linked service are incorrect.
Why it's wrong here
Incorrect credentials would cause a login failure, but the error is generic 'SqlOperationFailed' and could be connectivity-related.
✓
The self-hosted integration runtime is not configured properly.
Why this is correct
A self-hosted integration runtime is required to connect from Azure to on-premises networks; misconfiguration is a common cause of source-side failures.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-203 NAT questions on configuration and troubleshooting.
Develop data processing — This question tests Develop data processing — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The self-hosted integration runtime is not configured properly. — The error indicates a failure on the source side. Since the on-premises SQL Server has no firewall restrictions, the most likely cause is that the self-hosted integration runtime is not installed or configured correctly, preventing connectivity from the cloud to the on-premises network. Option A is plausible but less likely given the error message. Option C is not a typical cause for a source-side error. Option D is about staging, which is not mentioned.
What should I do if I get this DP-203 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-203 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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