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Exam PL-400 topic 4 question 27 discussion

Actual exam question from Microsoft's PL-400

Question #: 27
Topic #: 4

HOTSPOT
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You are developing a model-driven app by using Microsoft Power Platform.

The app must perform the following functions:

• Automatically receive updates from a purchase order system.
• Only add new purchase orders.

You need to implement the app.

Which components 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 chiari_do at May 13, 2023, 1:23 p.m.

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whiteblack

Highly Voted 2 years, 2 months ago

1. Polling Trigger A polling trigger is basically an event that periodically makes a call to your service to look for new data. Polling triggers differ from webhooks in that a polling trigger initiates an event to determine if new data is available, whereas webhooks respond to a push of new data from the service. refer this link: https://learn.microsoft.com/en-us/connectors/custom-connectors/create-polling-trigger

upvoted 10 times

Juan0414

5 months, 2 weeks ago

That is true, but I think that the solution requires that the update is done in real-time (sync) and polling periodically checks for updates. So, I think that the option is going with webhook because this listens for real-time updates and you use "Creation date" to only add new purchase orders as required

upvoted 2 times

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MikeAWS

Highly Voted 1 year, 11 months ago

Options 2 and 2 are correct IMO. - To automatically receive updates from an external system, you should use a Connector with a webhook trigger (Option 2). Webhooks allow external systems to push data to your app when specific events occur, which is a more efficient way to receive updates compared to polling (Option 1) or scheduled flows (Option 3). - To ensure that the app only adds new purchase orders, you should focus on a specific field or attribute related to the purchase orders. Among the options provided, "Creation date" (Option 2) is the most relevant attribute to determine whether a purchase order is new or not.

upvoted 9 times

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VKS5

Most Recent 9 months ago

I would go with 1. Webhook Trigger (As it runs on push while polling trigger runs periodically not realtime) 2. Creation Date (assuming that account number is not unique in the system. But Creation date will always be unique)

upvoted 1 times

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4e8b388

1 year, 3 months ago

Webhook trigger Creation date

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hai297

1 year, 4 months ago

• Automatically receive updates from a purchase order system. => Should be Webhook (Polling is requesting, not receiving) • Only add new purchase orders: Account Number is more sense IMO

upvoted 1 times

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markjr

1 year, 8 months ago

For me: 1. Webhooks trigger 2. Account Number Jus another lovely question from MS.

upvoted 4 times

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Sudheer93

1 year, 10 months ago

In exam - 9/23/2023

upvoted 2 times

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jkaur

2 years ago

1. Webhooks trigger 2. Account Number Seems correct

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Barb123

2 years ago

In exam 02.08.2023

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hjt

2 years ago

Does question 2 make any sense? I've no idea what is being asked

upvoted 5 times

uberlord

1 year, 11 months ago

assuming which option you picked for the first part, what choice would make it so we can make sure none of the requests are already existing. normally we'd check an ID or GUID, but if were doing a daily call with a polling trigger/scheduled flow we can look at the created date and only get requests in the last 24 hours. not elegant but its what i think the question is looking for

upvoted 3 times

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Mahstir

2 years, 2 months ago

1. Webhooks trigger 2. Account Number

upvoted 3 times

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chiari_do

2 years, 3 months ago

1. webhook trigger, for me "Webhooks are simple HTTP callbacks used to provide event notifications. Azure Logic Apps and Power Automate both allow you to use webhooks as triggers. A logic app or flow listens for this trigger and performs an action whenever the trigger fires." https://learn.microsoft.com/en-us/connectors/custom-connectors/create-webhook-trigger

upvoted 4 times

whiteblack

2 years, 3 months ago

I also agree with you because whenever we give notification from one application to another application about updates,messages we use web hook trigger.

upvoted 2 times

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