DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
Exhibit
Refer to the exhibit.
{
"permissions": [
{
"principal": "user@contoso.com",
"role": "Storage Blob Data Contributor",
"scope": "/"
},
{
"principal": "group-analysts@contoso.com",
"role": "Storage Blob Data Reader",
"scope": "/data/analytics/"
}
]
}Refer to the exhibit. You have an Azure Data Lake Storage Gen2 account with hierarchical namespace enabled. The exhibit shows an Azure CLI command output that lists access permissions. User user@contoso.com is a member of group-analysts@contoso.com. What level of access does user@contoso.com have to the /data/analytics/ directory?
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
✓
Read and write access
RBAC permissions are additive. The user has Storage Blob Data Contributor at the root scope, which grants read/write access to all directories. The reader role at the directory scope does not override the broader contributor role. Option A is wrong because the user has write access via the root scope. Option B is wrong because the user has read access from the root scope already. Option D is wrong because the user has explicit permissions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Access denied because of the directory-level reader role
Why it's wrong here
RBAC permissions are additive, not deny-by-default; the reader role does not deny write access.
- ✗
Read-only access
Why it's wrong here
The user has Storage Blob Data Contributor at root, which includes write access.
- ✓
Read and write access
Why this is correct
The user's root-level contributor role provides read and write access to all directories.
- ✗
No access
Why it's wrong here
The user has explicit permissions at root scope, so they have access.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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