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.
A company uses Azure Data Lake Storage Gen2 with hierarchical namespace enabled. They need to restrict a specific application's access to only write files in a particular directory without being able to read or list files. Which type of permission should be assigned?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure an access control list (ACL) that grants execute and write permissions to the application's service principal.
Option C is correct because POSIX-style ACLs allow granular permissions like write-only. Option A is wrong because RBAC roles like Storage Blob Data Contributor include read and list permissions. Option B is wrong because SAS tokens can be scoped but not to write-only at directory level easily. Option D is wrong because firewall rules control network access, not permissions.
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.
✗
Configure a firewall rule to allow only the application's IP address.
Why it's wrong here
Firewall rules do not control read/write permissions.
✓
Configure an access control list (ACL) that grants execute and write permissions to the application's service principal.
Why this is correct
ACLs allow fine-grained write-only access without read or list.
Related concept
Static NAT maps one inside address to one outside address.
✗
Generate a shared access signature (SAS) with write and list permissions.
Why it's wrong here
SAS can be scoped, but write-only is not typical.
✗
Assign the Storage Blob Data Contributor role at the storage account level.
Why it's wrong here
This role includes read and list permissions.
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: Configure an access control list (ACL) that grants execute and write permissions to the application's service principal. — Option C is correct because POSIX-style ACLs allow granular permissions like write-only. Option A is wrong because RBAC roles like Storage Blob Data Contributor include read and list permissions. Option B is wrong because SAS tokens can be scoped but not to write-only at directory level easily. Option D is wrong because firewall rules control network access, not permissions.
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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