Exam PL-400 topic 3 question 3 discussion

SaveData is wrong, which works only on canvas app. Offline capability from MDA in mobile, we need to create profile and enable some entities in case if mobile loses connectivity so that we still have access to those data. Init is to render the grid control and in update view we can write logic to render data in the grid. My answer would be updateview. reference link : Enable offline capability in MDA for mobile - https://knowledgefrommanish.com/powerapps/power-apps-mobile-app-mobile-offline-capability-for-model-driven-apps/

"You are asked to create a custom component". So you need to use PCF and the only methods in PCF interface are init and updateView. Init is to initialize component, so I vote for updateView

✅ The Correct Answer: B. updateView Here's why: In a PCF dataset component, updateView is called whenever the dataset changes. You can use updateView to render and cache data for offline usage. Combined with techniques like IndexedDB or localStorage (in JavaScript), updateView can help you store and update what the user sees even when offline.

custom component mean pcf not custom page(canvas app)

The correct answer is A. SaveData. Explanation: The SaveData method is used in Power Apps to store data locally on a device, enabling offline functionality. This is particularly useful in scenarios where mobile devices may lose network connectivity, as it allows data to be saved locally and synchronized later when the device reconnects. Here’s how the methods relate: SaveData: Stores data locally for offline use. updateView: Updates the user interface when data changes (used in custom PCF components but not for offline storage). init: Initializes the component when it loads. getClient: Retrieves the client type (web, mobile, etc.), but it doesn’t handle offline data storage. Therefore, SaveData is the correct method to support offline capabilities.

PCF only have updateView and init. The init is quite not make sense. So I choose updateView

Should be updateView

Updateview

SaveData is used for canvas app, thus can't be correct. https://learn.microsoft.com/en-us/power-apps/maker/canvas-apps/offline-apps

Custom component can be a pcf , but can be a page app or a canvas apps. A is correct.

A "SaveData" method typically allows to persist the data locally on the device, so it can be retrieved later even if the device loses connection to the network. This method is typically used in offline-capable apps to ensure that data is not lost even if the network connection is lost. In this case, since the requirement is to capture multiple values from lab test results on mobile devices, and to ensure that the data is not lost in case of network disconnection, using a "SaveData" method would be an appropriate solution. "UpdateView" is a method that is used to refresh or update the display of the user interface. It is typically used to reflect changes in the data or state of the app, such as changes made by the user or changes received from a server. In this case, "UpdateView" would not be an appropriate method for ensuring that the data is saved in case the mobile device loses connection to the network.

based on comments it's clear that A is not sure

in exams 24/5 . savedata was not an option anymore

UpdateView

Can we not create the canvas app as the interface and then use SaveData ? Then embed it as a custom control in the model driven app ? This is the most 'low-code' way of implementing it as opposed to using PCF

I would go with SaveData... you are asked to create the custom component for mobile devices...and design an interface. wouldnt this be a canvas-app? the question only says that the company use a model-driven app.

but you can embed a canvas app into MDA that might have that custom component for offline. so savedata might still be an answer?