Exam AZ-204 topic 2 question 4 discussion

Hi All, The answer (B) is correct. Because, the trick is in the "less than one minute" detail. You can read about "..10-minute delay in processing new blobs.." in "3-Minimizing latency" description. Microsoft says: ".....Use Event Grid instead of the Blob storage trigger for the following scenarios:" 1-Blob-only storage accounts: Blob-only storage accounts are supported for blob input and output bindings but not for blob triggers. 2-High-scale: High scale can be loosely defined as containers that have more than 100,000 blobs in them or storage accounts that have more than 100 blob updates per second. 3-Minimizing latency: If your function app is on the Consumption plan, there can be up to a ##10-minute delay in processing new blobs## if a function app has gone idle. To avoid this latency, you can switch to an App Service plan with Always On enabled. You can also use an Event Grid trigger with your Blob storage account. For an example, see the Event Grid tutorial. REFENCE: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-storage-blob-trigger?tabs=csharp#event-grid-trigger I wish you a good day.

Answer is not at all clear from the explanation. It seems like answer should be yes instead of no.

Answer YES

Answer: No Because Blob storage triggers (like in Azure Functions) can take up to 10 minutes to start processing if the function app is idle. But the requirement says processing must start in less than 1 minute. To meet that, you should use Event Grid, which is faster, but the solution doesn't mention that. ✅ So, the solution doesn't guarantee <1 min → Answer is No.

Yes, the solution meets the goal.

Azure Blob Storage events can trigger an Azure Function or an Event Grid subscription whenever a new photo is uploaded. This ensures that the photo processing starts in less than one minute, meeting the requirement. Blob storage events integrate with Azure Event Grid, which can then trigger processing logic in Azure Functions, Logic Apps, or Event Hubs.

Yes, triggering the photo processing from Blob storage events does meet the goal. Azure Blob Storage can emit events that can be captured by Azure Event Grid. These events can then trigger various processes or workflows. In this scenario, when a user uploads a photo to Blob Storage, an event is generated. This event can be subscribed to by an Azure Function or a Logic App, which in turn can start the process of creating a mobile-friendly version of the image. This approach is efficient and can easily meet the requirement of starting the image processing in less than one minute after the photo is uploaded. Azure Event Grid is known for its low latency in delivering events, typically in the order of seconds, which aligns well with the specified requirement.

I think it should be 'B', as per Microsoft for blob events 'There is no service level agreement around the time it takes for a message to arrive. It's not uncommon for messages to arrive anywhere from 30 minutes to two hours.' https://learn.microsoft.com/en-us/azure/storage/blobs/storage-blob-event-overview#practices-for-consuming-events

I think B is the right answe

I think the given answer is correct. In this question, there is no mention of how to process the images after they are triggered, whether to use the Function app or not. It's only about the trigger itself. So the Blob storage events should meet the goal.

Just as information I just had this question on my AZ204 exam - 16-jun-2023. I barely made it (with only 767 points) so I can't inform anyony if this answer is correct or not, just stating that this is an actual exam question.

Correct Answer : B Not necessary to convert the account, instead move photo processing to an Azure Function triggered from the blob upload.. Azure Storage events allow applications to react to events. Common Blob storage event scenarios include image or video processing, search indexing, or any file- oriented workflow. Note: Only storage accounts of kind StorageV2 (general purpose v2) and BlobStorage support event integration. Storage (general purpose v1) does not support integration with Event Grid.

Got this in the exam today! Feb 28, 2023

I think "##must start## in less than one minute" is the keyword here. Thus answer is highly B.

Yes, the solution of triggering the photo processing from Blob storage events meets the goal of starting the photo processing in less than one minute after a photo is uploaded. Azure Storage Blob storage provides event notifications for blob creation, which can be used to trigger the photo processing. This allows for the processing to start as soon as a photo is uploaded, thereby meeting the requirement of starting the process in less than one minute.

The question states that you have developed a service. So why wait for the Blob storage to trigger when the service intercepts the event requested before even reaching the blob. So the answer is B.

Got this in the exam today ! Nov 25, 2022