AZ-204 Develop for Azure storage Practice Question
You are developing a solution that stores large media files in Azure Blob Storage. Users access these files frequently for the first 30 days, then rarely afterwards. To optimize costs, you need to automatically move blobs to a cooler tier after 30 days of creation. Which Azure feature should you use?
⚠ Common exam trap
Watch out — candidates often confuse lifecycle management with Blob inventory or Change feed, thinking that reporting or event logging alone can automate tier transitions, but only lifecycle policies provide the native, rule-based automation without additional code.
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
✓
Lifecycle management policies
Azure Blob Storage lifecycle management policies allow you to automatically transition blobs to cooler tiers (e.g., from Hot to Cool) based on age or last modification time. By defining a rule that moves blobs to the Cool tier 30 days after creation, you optimize storage costs for frequently accessed files that become rarely used. This feature is purpose-built for automating tier transitions without manual intervention or custom code.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Lifecycle management policies
Why this is correct
Lifecycle management policies are the correct solution because they automate the transition of blobs between different storage tiers (Hot, Cool, Archive) based on rules defined by age, last access time, or other criteria. This automation is crucial for optimizing storage costs for large media files, as it ensures less frequently accessed data is moved to cheaper tiers without manual intervention. By automatically moving older or less-accessed media to Cool or Archive storage, significant cost savings can be achieved.
- ✗
Blob inventory
Why it's wrong here
Blob inventory is incorrect because it provides a comprehensive report of all blobs and their properties within a storage account, such as size, tier, and creation date. While this report is valuable for auditing, analysis, and informing manual tiering decisions, it is purely a reporting mechanism. Blob inventory does not possess any built-in functionality to automatically change the storage tier of a blob or execute any data management actions.
- ✗
Change feed
Why it's wrong here
Change feed is incorrect because it provides a durable, ordered log of all changes that occur to blobs and containers within a storage account. This feature is primarily designed for scenarios requiring event-driven processing, data replication, or data analytics over changes, such as triggering functions when a new blob is created. However, the change feed itself does not offer any capabilities to automatically manage or transition the storage tiers of blobs.
- ✗
Immutable storage
Why it's wrong here
Immutable storage is incorrect because its primary purpose is data protection and compliance, ensuring that data cannot be modified or deleted for a specified retention period or until a legal hold is removed. This feature, also known as Write Once, Read Many (WORM) storage, prevents any alterations to the blob, including its storage tier, during its immutable state. It is a security and compliance mechanism, not a tool for cost optimization through automated tiering.
Quick reference
Azure Blob Storage Tier Comparison
| Tier | Storage Cost | Retrieval Cost | Latency | Use Case |
|---|---|---|---|---|
| Hot | Highest | Lowest | Immediate | Active data, frequent reads |
| Cool | Lower | Higher | Immediate | Data accessed < once / month |
| Cold | Lower still | Higher | Immediate | Data accessed < once / quarter |
| Archive | Lowest | Highest + rehydration delay | Hours | Long-term compliance retention |
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-204 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 AZ-204 exam.