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AZ-305 · Question #112

Hotspot Question You have an on-premises file server that stores 2 TB of data files. You plan to move the data files to Azure Blob Storage In the West Europe Azure region. You need to recommend a…

Azure Storage Account - Hotspot Answer Correct Answers 1. Storage Account Type: Standard general-purpose v2 2. Redundancy: Zone-redundant storage (ZRS) --- Dropdown 1: Storage Account Type Correct: Standard general-purpose v2 GPv2 is the recommended account type for Blob…

Submitted by renata2k· Mar 6, 2026Design data storage solutions

Question

Hotspot Question You have an on-premises file server that stores 2 TB of data files. You plan to move the data files to Azure Blob Storage In the West Europe Azure region. You need to recommend a storage account type to store the data files and a replication solution for the storage account. The solution must meet the following requirements: - Be available if a single Azure datacenter fails. - Support storage tiers. - Minimize cost. What should you recommend? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point. Answer:

Exhibits

AZ-305 question #112 exhibit 1
AZ-305 question #112 exhibit 2

Answer Area

  • Storage Account type:
    Premium block blobsStandard general-purpose v1Standard general-purpose v2
  • Redundancy:
    Geo-redundant storage (GRS)Zone-redundant storage (ZRS)Locally-redundant storage (LRS)Read-access geo-redundant storage (RA-GRS)

Explanation

Azure Storage Account - Hotspot Answer

Correct Answers

  1. Storage Account Type: Standard general-purpose v2
  2. Redundancy: Zone-redundant storage (ZRS)

Dropdown 1: Storage Account Type

Correct: Standard general-purpose v2

GPv2 is the recommended account type for Blob Storage because it:

  • Supports all storage tiers: Hot, Cool, and Archive - directly satisfying the "support storage tiers" requirement
  • Uses HDD-based (standard) storage, keeping costs low
  • Supports all modern Azure Storage features (Blob, Files, Queues, Tables)

Why the others are wrong:

OptionWhy Wrong
Premium block blobsUses SSD storage - significantly higher cost. Does not support storage tiers (Hot/Cool/Archive). Eliminates two requirements.
Standard general-purpose v1Legacy account type. Does not support storage tiers. Fewer features, no lifecycle management.

Key concept: Storage tiers (Hot/Cool/Archive) are only supported on GPv2 and Blob storage account types among the standard tier offerings.


Dropdown 2: Redundancy

Correct: Zone-redundant storage (ZRS)

ZRS replicates data synchronously across 3 availability zones within the same Azure region (West Europe). Each availability zone is a physically separate datacenter. Therefore:

  • If one datacenter fails, data remains accessible from the other two zones - satisfying the availability requirement
  • It stays within one region, making it cheaper than geo-redundant options

Why the others are wrong:

OptionWhy Wrong
LRSReplicates 3 copies within a single datacenter only. A datacenter failure = potential outage. Fails the availability requirement.
GRSReplicates to a secondary region asynchronously. Survives datacenter failure, but costs ~2Ã- ZRS. Fails the minimize cost requirement.
RA-GRSSame as GRS + read access to secondary region. Most expensive option. Overkill for this scenario.

Key concept: The phrase "single datacenter fails" maps directly to availability zone failure, which ZRS is specifically designed to handle - within one region, at the lowest redundancy cost that meets this bar.


Summary

RequirementSolution
Survive single datacenter failureZRS (3 zones)
Support storage tiersStandard GPv2
Minimize costZRS over GRS/RA-GRS; Standard over Premium

Topics

#Azure Storage Accounts#Blob Storage#Storage Redundancy#Cost Optimization

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