Canvas App Development Flashcards

In Power Apps, what does the Patch() function do when the first argument is a data source and the second is Defaults(DataSource)?

Answer: Creates a new record in the data source

Using Defaults() as the base record tells Patch() to create a new record rather than update an existing one.

Which Canvas app component feature allows you to define output properties that can pass values back to the hosting screen?

Answer: Custom output properties

Components support custom output properties that expose internal values to the parent screen or app.

What is the maximum number of screens recommended in a single Canvas app for optimal performance?

Answer: There is no official max but fewer than 30-40 screens is a best practice

Microsoft recommends keeping Canvas apps under roughly 30-40 screens to maintain acceptable load and navigation performance.

Which formula would you use in a Canvas app to navigate to a screen called 'DetailScreen' with a fade transition?

Answer: Navigate(DetailScreen, ScreenTransition.Fade)

Navigate() accepts the target screen reference and a ScreenTransition enum value such as ScreenTransition.Fade.

In a Canvas app, which data type would you use to store a list of records that only exists in memory during the app session?

Answer: Collection

Collections are in-memory tables created with Collect() or ClearCollect() that persist only for the app session.

What does the UpdateContext() function do in a Canvas app?

Answer: Creates or updates a context variable scoped to the current screen

UpdateContext() sets screen-level context variables that are accessible only within the screen where they are created.