AZ-204 Develop for Azure storage Practice Question
You need to store and retrieve large binary files (up to 100 GB each) with low latency. The files will be accessed by multiple geographic regions. Which Azure storage solution should you recommend?
⚠ Common exam trap
A common mix-up: candidates confuse Azure Files (SMB shares) with Blob Storage for large binary files, not realizing that Azure Files has a 1 TB file size limit and is optimized for shared file access, not for high-throughput blob storage with geo-replication.
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
✓
Azure Blob Storage with geo-redundant storage (GRS).
Azure Blob Storage is designed for storing large binary objects (up to 4.7 TB per blob) and offers low-latency access via HTTP/HTTPS. Geo-redundant storage (GRS) replicates data to a paired secondary region, providing durability and availability for multi-region access. This combination meets the requirements for large files (up to 100 GB) and low-latency retrieval from multiple geographic regions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Queue Storage with messages.
Why it's wrong here
Azure Queue Storage is specifically designed for storing large numbers of messages that can be retrieved by applications for asynchronous processing. Each individual message has a strict maximum size limit of 64 KB. This fundamental design constraint makes it entirely unsuitable for storing large binary files, such as those up to 100 GB, as its purpose is message brokering, not general-purpose object storage.
- ✗
Azure Files with Azure File Sync.
Why it's wrong here
Azure Files provides fully managed file shares in the cloud, accessible via standard SMB or NFS protocols, and is primarily used for traditional file share scenarios or lift-and-shift applications requiring file system semantics. While it can store files, it is not specifically optimized for storing and retrieving extremely large, individual binary objects up to 100 GB with the same cost-effectiveness, scalability, and API access patterns as dedicated object storage. Azure File Sync extends these shares to hybrid environments, but the core service remains a file share.
- ✓
Azure Blob Storage with geo-redundant storage (GRS).
Why this is correct
Azure Blob Storage is purpose-built for storing massive amounts of unstructured data, including large binary files, images, videos, and backups, making it the ideal choice for objects up to 100 GB. It offers unparalleled scalability, cost-effectiveness across various access tiers, and robust APIs for object management. Implementing Geo-Redundant Storage (GRS) further enhances data durability and availability by asynchronously replicating data to a secondary Azure region hundreds of miles away, providing comprehensive protection against regional outages.
- ✗
Azure SQL Database with file tables.
Why it's wrong here
Azure SQL Database is a relational database service primarily designed for structured data and transactional workloads, adhering to ACID properties. While it supports storing binary data using types like VARBINARY(MAX) or through features like FileTables, storing extremely large binary files (up to 100 GB) directly within a database is generally inefficient, costly, and can significantly impact database performance, backup/restore operations, and overall manageability. Dedicated object storage solutions are far more suitable and performant for this scale of unstructured data.
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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Senior Network & Security Engineer · founder of Courseiva
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