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Exam AZ-203 topic 3 question 13 discussion

Actual exam question from Microsoft's AZ-203

Question #: 13
Topic #: 3

You develop an app that allows users to upload photos and videos to Azure storage. The app uses a storage REST API call to upload the media to a blob storage account named Account1. You have blob storage containers named Container1 and Container2.
Uploading of videos occurs on an irregular basis.
You need to copy specific blobs from Container1 to Container2 in real time when specific requirements are met, excluding backup blob copies.
What should you do?

A. Download the blob to a virtual machine and then upload the blob to Container2.
B. Run the Azure PowerShell command Start-AzureStorageBlobCopy.
C. Copy blobs to Container2 by using the Put Blob operation of the Blob Service REST API.
D. Use AzCopy with the Snapshot switch blobs to Container2.

Show Suggested Answer

Suggested Answer: B 🗳️
The Start-AzureStorageBlobCopy cmdlet starts to copy a blob.

Example 1: Copy a named blob -
C:\PS>Start-AzureStorageBlobCopy -SrcBlob "ContosoPlanning2015" -DestContainer "ContosoArchives" -SrcContainer "ContosoUploads"
This command starts the copy operation of the blob named ContosoPlanning2015 from the container named ContosoUploads to the container named
ContosoArchives.
References:
https://docs.microsoft.com/en-us/powershell/module/azure.storage/start-azurestorageblobcopy?view=azurermps-6.13.0

by chaudh at July 12, 2020, 9:17 a.m.

Comments

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chaudh

Highly Voted 4 years, 10 months ago

why not C? The REST API for uploading is already supported. Also, coping with PowerShell or CLI seems not to be good choices for "real time" requirement.

upvoted 12 times

Bluediamond

4 years, 10 months ago

I tend to agree with you. Now if B said something like create a PS runbook that is set on a webhook connected to storage account then that would make sense.

upvoted 3 times

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rrongcheng

4 years, 10 months ago

I think it's C too. As it uses storage REST API to upload to Container1, it's easy to do the same to put into Container2 at the same time to make it ' in real time'

upvoted 3 times

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altafpatel1984

Most Recent 3 years, 6 months ago

If Start-AzureStorageBlobCopy is triggered by Event Grid then it make sense, which is not mentioned here so C is correct. For following question, since Event Grid is mentioned with Start-AzureStorageBlobCopy, that make sense: https://www.examtopics.com/discussions/microsoft/view/37714-exam-az-204-topic-3-question-24-discussion/

upvoted 2 times

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Mehabooba

4 years, 4 months ago

The Put Blob operation creates a new block, page, or append blob, or updates the content of an existing block blob. Updating an existing block blob overwrites any existing metadata on the blob. The difference between the two is likely AzCopy is operating a bulk mode and Start-AzureStorageBlobCopy is operating serially due to piping the blobs in one by one, sending request to initiate the transfer

upvoted 1 times

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Chilred

4 years, 5 months ago

There is a similar question in az204: https://www.examtopics.com/discussions/microsoft/view/37714-exam-az-204-topic-3-question-7-discussion/ In both the option C is available. So in choice between B and C, I would go with C

upvoted 1 times

Chilred

4 years, 5 months ago

Sorry, my fault. This are different questions....

upvoted 4 times

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kirannep

4 years, 7 months ago

Anyone saying put, The Put Blob operation creates a new block, page, or append blob, or updates the content of an existing block blob. Answer is B because you want to copy in realtime even if it is ps script.

upvoted 3 times

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Larry616

4 years, 9 months ago

Answer should be C B only makes sense if it was "Create a PS script and set it up by AZ Functions or Webjobs", but it's "Run PS ..." which means triggered manually and couldn't meet the "real time" requirement

upvoted 2 times

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xsify

4 years, 10 months ago

Copy with Put Blob (C) requires more step, for example, Put Blob on page blob and append blob only initialize the blob, additional step is needed to copy the blob. So i think the answers is B. https://docs.microsoft.com/en-us/rest/api/storageservices/put-blob

upvoted 4 times

rrongcheng

4 years, 10 months ago

B doesn't meet the 'real-time' requirement. It has to be done by code.

upvoted 1 times

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Kobee

4 years, 6 months ago

It uses a storage REST API to upload media, so the block type is a Block Blob, not a Page Blob (used for VM) and Append Blob (used to append data like logs) So I think the correct answer is C. For a block blob, the request body contains the content of the blob (see https://docs.microsoft.com/en-us/rest/api/storageservices/put-blob#request-body)

upvoted 1 times

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