The answer is to enable Azure Storage Service Encryption (SSE), configure Azure RBAC roles, and set POSIX-like ACLs. SSE automatically encrypts your parquet files at rest using 256-bit AES encryption, which is transparent and enabled by default for all new ADLS Gen2 accounts, ensuring data is secure without any application changes. RBAC controls coarse-grained access at the storage account or container level, while ACLs provide fine-grained permissions on directories and files, together forming a layered security model. On the DP-203 exam, this question tests your understanding that encryption at rest is handled by the platform, not by firewalls (which restrict network traffic) or soft delete (which is for recovery). A common trap is confusing access control methods with encryption mechanisms. Remember the mnemonic "SEA": Storage Service Encryption, RBAC, and ACLs—the three pillars for securing data at rest in ADLS Gen2.
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.
Your organization uses Azure Data Lake Storage Gen2 to store parquet files. You need to secure the data at rest and control access. Which THREE methods 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
✓
Set POSIX-like ACLs on directories and files.
Options A, B, and D are correct. Encryption at rest is done by Azure Storage Service Encryption. Access control is via RBAC and ACLs. Option C is wrong because firewall restricts network access, not data at rest. Option E is wrong because soft delete is for data recovery, not security.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Set POSIX-like ACLs on directories and files.
Why this is correct
ACLs provide fine-grained access control.
Related concept
Standard ACLs match source addresses.
✓
Configure RBAC roles to control access to storage accounts.
Why this is correct
RBAC provides coarse-grained access control.
Related concept
Standard ACLs match source addresses.
✗
Configure Azure Storage Firewall to allow only trusted IPs.
Why it's wrong here
Firewall controls network access, not data encryption.
✓
Enable Azure Storage Service Encryption (SSE) for data at rest.
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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 ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DP-203 ACL questions on filtering logic and placement.
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Set POSIX-like ACLs on directories and files. — Options A, B, and D are correct. Encryption at rest is done by Azure Storage Service Encryption. Access control is via RBAC and ACLs. Option C is wrong because firewall restricts network access, not data at rest. Option E is wrong because soft delete is for data recovery, not security.
What should I do if I get this DP-203 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DP-203 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.