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Describe core data concepts →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is to access the previous version through the version list and restore it. This is correct because Azure Blob Storage versioning automatically creates and preserves a historical version of a blob every time it is modified or overwritten, meaning the overwritten data is never truly lost. When a developer accidentally overwrites a blob, the simplest recovery method is to promote the prior version from the version list back to the current version, instantly restoring the blob to its previous state without needing backups or additional tools. On the DP-900 exam, this scenario tests your understanding of versioning as a built-in data protection feature, often appearing in questions about blob recovery and overwrite scenarios. A common trap is thinking you need to use soft delete or snapshots for recovery, but versioning alone handles overwrites natively. Memory tip: think of versioning as a “time machine” for your blobs—promote the old version to turn back the clock.

DP-900 Describe core data concepts Practice Question

This DP-900 practice question tests your understanding of describe core data concepts. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Exhibit

{
  "name": "sales",
  "location": "eastus",
  "properties": {
    "isVersioningEnabled": true,
    "publicNetworkAccess": "Enabled",
    "storageAccount": "/subscriptions/.../storageAccounts/salesdatalake",
    "containerSoftDeleteDurationInDays": 7
  },
  "resourceType": "Microsoft.Storage/storageAccounts/blobServices/containers"
}

Refer to the exhibit. You are reviewing an Azure Resource Manager template for a Blob Storage container named 'sales'. The container has versioning enabled. A developer accidentally overwrites a blob. What is the simplest way to recover the previous version?

Question 1mediummultiple choice
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Exhibit

{
  "name": "sales",
  "location": "eastus",
  "properties": {
    "isVersioningEnabled": true,
    "publicNetworkAccess": "Enabled",
    "storageAccount": "/subscriptions/.../storageAccounts/salesdatalake",
    "containerSoftDeleteDurationInDays": 7
  },
  "resourceType": "Microsoft.Storage/storageAccounts/blobServices/containers"
}

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

✓

Access the previous version through the version list and restore it

Option A is correct because Azure Blob Storage versioning automatically maintains a history of blob versions. When a blob is overwritten, the previous version is preserved and can be accessed via the version list. The simplest recovery method is to promote the previous version to the current version, which restores the blob to its prior state without needing additional services or configurations.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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 the previous version through the version list and restore it

    Why this is correct

    Versioning keeps all versions; you can promote a previous version to the current one.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Use blob soft delete to recover the blob

    Why it's wrong here

    Soft delete is for deleted blobs, not overwritten ones.

  • ✗

    Restore from a backup using Azure Backup

    Why it's wrong here

    Azure Backup is for VM or file share backups; blob versioning provides self-service recovery.

  • ✗

    Perform a point-in-time restore of the container

    Why it's wrong here

    Point-in-time restore is for the entire storage account, not a single blob, and is more complex.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse versioning with soft delete, assuming soft delete can recover overwrites, but soft delete only protects against deletions, not modifications.

Detailed technical explanation

How to think about this question

Azure Blob Storage versioning works by creating a new version for each write operation (PutBlob, SetBlobProperties, etc.) and preserving the previous version as a read-only snapshot. The version ID is a timestamp-based GUID, and you can promote a previous version to the current version by copying it over the current blob using the 'x-ms-copy-source' header with the version ID. This operation is atomic and does not require any additional backup infrastructure.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this DP-900 question test?

Describe core data concepts — This question tests Describe core data concepts — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Access the previous version through the version list and restore it — Option A is correct because Azure Blob Storage versioning automatically maintains a history of blob versions. When a blob is overwritten, the previous version is preserved and can be accessed via the version list. The simplest recovery method is to promote the previous version to the current version, which restores the blob to its prior state without needing additional services or configurations.

What should I do if I get this DP-900 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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This DP-900 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-900 exam.