PL 400 PCF Controls (Power Apps Component Framework) 2

Question 1

In the `updateView` method signature, which parameter provides access to the control's current input property values and all framework services?

Accepted Answer

context

Answer

The `context` parameter of type `ComponentFramework.Context<IInputs>` exposes `context.parameters` for property values plus all framework service APIs such as webAPI, formatting, and client.

Question 2

How does a PCF control signal to the host application that an output property value has changed?

Accepted Answer

By calling context.events.notifyOutputChanged()

Answer

Calling `context.events.notifyOutputChanged()` tells the framework that output values have changed; the framework then calls `getOutputs()` to retrieve the new values and propagates them to the host.

Question 3

What is the purpose of the `getOutputs` method in a PCF control?

Accepted Answer

To return a snapshot of all current output property values to the framework after notifyOutputChanged is called

Answer

`getOutputs` is called by the framework in response to `notifyOutputChanged()` and must return an object whose keys match the output properties defined in the manifest.

Question 4

Which ControlManifest.Input.xml element declares each bindable property, its data type, and its usage direction?

Accepted Answer

Answer

The `<property>` element in ControlManifest.Input.xml defines each control property with attributes such as name, of-type, usage (bound/input), and required.

Question 5

What is the key architectural difference between a 'field' type and a 'dataset' type PCF component?

Accepted Answer

Field components bind to a single scalar value; dataset components bind to a collection of records with columns

Answer

Field-type controls replace a single-field control (e.g., a text box), while dataset-type controls replace multi-record views like grids or galleries, receiving a full dataset with multiple rows and columns.

(PL 400) Microsoft Certified Power Platform Developer Associate Practice Test

(PL 400) Microsoft Certified Power Platform Developer Associate Practice Test

PL 400 PCF Controls (Power Apps Component Framework) 2