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Exam AZ-204 topic 6 question 51 discussion

Actual exam question from Microsoft's AZ-204

Question #: 51
Topic #: 6

HOTSPOT
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You are developing an application to store millions of images in Azure blob storage.

The application has the following requirements:

• Store the Exif (exchangeable image file format) data from the image as blob metadata when the application uploads the image.
• Retrieve the Exif data from the image while minimizing bandwidth and processing time.
• Utilizes the REST API.

You need to use the image Exif data as blob metadata in the application.

Which HTTP verbs should you use? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Show Suggested Answer

Suggested Answer:

by Firo at July 28, 2023, 11:39 p.m.

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oCaio

Highly Voted 2 years ago

Retrieve via HEAD because "For example, if your application needs the Exif (exchangeable image format) data from a photo, it can retrieve the photo and extract it. To save bandwidth and improve performance, your application can store the Exif data in the blob's metadata when the application uploads the photo. You can then retrieve the Exif data in metadata using only a HEAD request." Ref: https://learn.microsoft.com/en-us/azure/storage/blobs/storage-performance-checklist#use-metadata

upvoted 8 times

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Fabiann

Highly Voted 2 years ago

we want to store as Metadata : so PUT for set and GET/HEAD to retrieve. https://learn.microsoft.com/en-us/training/modules/work-azure-blob-storage/6-set-retrieve-properties-metadata-rest?ns-enrollment-type=learningpath&ns-enrollment-id=learn.wwl.develop-solutions-that-use-blob-storage

upvoted 7 times

the_odd_one

1 year, 9 months ago

I see where you come from on the link, however generally POST is for new data and PUT is for overriding existing data. When the question is phrased "Store the Exif (exchangeable image file format) data from the image as blob metadata when the application uploads the image." I lean towards using POST and not PUT

upvoted 2 times

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overhill

Most Recent 9 months ago

POST on the first box might made the most sense for most people but the right answer is PUT And HEAD for the second one to get the metadata

upvoted 1 times

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yusuf_eb

1 year ago

why PUT? While you might think POST sounds more logical, using PUT instead of POST is generally preferred for storing or updating data in Azure Blob Storage, and here's why: PUT: The PUT method is idempotent, meaning that making the same PUT request multiple times will result in the same outcome. This is ideal for uploading a file or setting metadata because it ensures consistency—if you PUT the same data again, it will simply overwrite the previous version. as for retrieval i would also say GET

upvoted 1 times

yusuf_eb

1 year ago

For the second one i'm not sure tho

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sky_may

1 year, 7 months ago

answers are correct: https://learn.microsoft.com/en-us/rest/api/storageservices/get-blob-metadata?tabs=microsoft-entra-id#authorization https://learn.microsoft.com/en-us/rest/api/storageservices/set-blob-metadata?tabs=microsoft-entra-id#authorization https://learn.microsoft.com/en-us/azure/storage/blobs/storage-blob-properties-metadata

upvoted 2 times

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130nk3r5

1 year, 8 months ago

To store Exif data, you should use the PUT verb. To retrieve Exif data, you should use the HEAD verb. Explanation: PUT is used to upload the blob to Azure Storage and set the blob's metadata at the same time. The metadata is sent in the headers of the PUT request. HEAD is used to retrieve the metadata of a blob without downloading the blob itself. This minimizes bandwidth and processing time as only the headers of the response (which contain the metadata) are sent.

upvoted 4 times

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danisancho

1 year, 9 months ago

According to ChatGPT, first answer is correct: "When storing Exif data from an image as blob metadata in Azure Blob Storage, you can use the HTTP `PUT` method. This method is commonly used for uploading a resource to the specified URI, which in this case would be the URL of your Azure Blob Storage container. When making the `PUT` request, you can include the Exif data as metadata headers in the request to associate the metadata with the uploaded blob."

upvoted 1 times

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Ciupaz

1 year, 11 months ago

Strange question and answers. The response should be POST and GET.

upvoted 2 times

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kvtborad

2 years ago

I got this question on 6th August 2023. chose highly voted first box: PUT, Second Box: POST. passed with 904. I got a Case study: city and Lights. All questions are from ExamTopics.

upvoted 4 times

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NguyenDo

2 years ago

Store can be PUT or POST, make no sense, I think Head for store and retrieve.

upvoted 3 times

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Firo

2 years ago

Store: Head (not sure) Retrieve: Head https://learn.microsoft.com/en-us/azure/storage/blobs/storage-performance-checklist#use-metadata

upvoted 1 times

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