DP-203 Design and implement data storage Practice Question
Your organization is implementing a data lake using Azure Data Lake Storage Gen2. You have a folder structure like '/data/landing/' for raw data and '/data/curated/' for cleaned data. The data is ingested daily from various sources. You need to ensure that data in the curated zone is immutable and cannot be modified or deleted by anyone, including administrators, for compliance reasons. However, data in the landing zone should be modifiable. What should you do?
⚠ Common exam trap
Many candidates assume ACLs or RBAC alone can enforce immutability, but they fail to recognize that only container-level immutable storage provides the WORM guarantee that cannot be overridden by administrators or privileged accounts.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable immutable storage with a time-based retention policy on the curated zone container
Azure Data Lake Storage Gen2 supports immutable storage at the container level, which enforces a time-based retention policy that prevents any data from being modified or deleted—even by administrators—until the retention period expires. This directly meets the compliance requirement for the curated zone, while leaving the landing zone container unaffected and modifiable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable immutable storage with a time-based retention policy on the curated zone container
Why this is correct
Immutable storage prevents any modification or deletion until the retention period expires.
- ✗
Remove the 'Delete' permission from the storage account key
Why it's wrong here
This does not prevent overwrites or modifications via other methods.
- ✗
Set ACLs on the curated zone folder to deny write and delete for all users
Why it's wrong here
ACLs can be changed by users with write permission on the ACL.
- ✗
Use Azure RBAC to deny delete and write permissions for all users on the curated zone folder
Why it's wrong here
RBAC can be bypassed by administrators with Owner role.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.