The answer is to configure a retry policy on the copy activity and enable fault tolerance. These two settings directly address transient network errors by automatically reattempting failed operations and skipping problematic rows without halting the entire pipeline. On the DP-203 exam, this scenario tests your understanding of how to improve Azure Data Factory copy reliability without overcomplicating the solution—common traps include choosing staging (which handles bulk copy performance, not retries) or increasing ParallelCopy (which boosts throughput but does not handle failures). Remember that retry policies handle activity-level failures, while fault tolerance manages data-level inconsistencies at the sink. A useful memory tip is “Retry the activity, tolerate the data”—if the network blips, retry; if a row is corrupt, tolerate and skip.
DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and 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.
You are monitoring an Azure Data Factory pipeline that copies data from an on-premises SQL Server to Azure Blob Storage. You notice frequent failures due to transient network errors. Which TWO actions should you take to improve reliability?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable fault tolerance in the copy activity to skip incompatible rows.
Options B and C are correct. Retry policy and fault tolerance handle transient errors. Option A is wrong because staging is for bulk copies, not for transient errors. Option D is wrong because self-hosted IR is for connectivity, not for retry. Option E is wrong because ParallelCopy increases throughput but not reliability.
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.
✗
Deploy a self-hosted integration runtime on a VM in Azure.
Why it's wrong here
Self-hosted IR is for on-premises connectivity, not retry.
✗
Use staged copy with Azure Data Lake as intermediate storage.
Why it's wrong here
Staging helps with large data, not transient errors.
✓
Enable fault tolerance in the copy activity to skip incompatible rows.
Why this is correct
Fault tolerance allows pipeline to continue despite errors.
Related concept
Static NAT maps one inside address to one outside address.
✓
Configure a retry policy on the copy activity.
Why this is correct
Retries handle transient failures.
Related concept
Static NAT maps one inside address to one outside address.
✗
Increase the degree of copy parallelism.
Why it's wrong here
Parallelism increases throughput, not reliability.
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 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.
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.
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable fault tolerance in the copy activity to skip incompatible rows. — Options B and C are correct. Retry policy and fault tolerance handle transient errors. Option A is wrong because staging is for bulk copies, not for transient errors. Option D is wrong because self-hosted IR is for connectivity, not for retry. Option E is wrong because ParallelCopy increases throughput but not reliability.
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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