PL-400 Exam Guide, Objectives & Preparation

Exam Overview

Exam Code	PL-400
Exam Name	Microsoft Power Platform Developer
Vendor	Microsoft
Total Questions	392
Last Updated	26-Oct, 2026

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Free PL-400 Practice Questions

Explore 5 free practice questions for the Microsoft PL-400 exam and review the answers and explanations to support your preparation.

Question 1
Single answer

You need to add the script for the registration form event handling. Which code segment should you use?
- Option A:
  formContext.data.entity.addOnSave(myFunction)
  Correct
- Option B:
  formContext.data.addOnLoad(myFunction)
  Correct
- Option C:
  formContext.data.removeOnLoad(myFunction)
  Correct
- Option D:
  addOnPreProcessStatusChange
  Correct
- Option E:
  formContext.data.isValid()
  Correct
Show Answer & Explanation Hide Answer & Explanation

Correct Answer: B

Explanation

Scenario: Information about upcoming tournaments must be pre-located into the registration form when the registration form loads. addOnLoad adds event handlers to the Subgrid OnLoad event event.
Question 2
Single answer

You need to determine the primary cause of the issue reported by interns when they use the app. What is the primary cause?
- Option A:
  Interns have the System Customizer security role but need the Environment Maker security role.
  Correct
- Option B:
  Interns have the Common Data Service User security role but need the Environment Maker security role.
  Correct
- Option C:
  Interns have the Environment Maker security role but need the Common Data Service User security role.
  Correct
- Option D:
  Interns have the Environment Maker security role but need the System Customizer security role.
  Correct
- Option E:
  Interns have the Environment Maker security role but need the Delegate security role.
  Correct
Show Answer & Explanation Hide Answer & Explanation

Correct Answer: D

Explanation

Scenario: Interns can create apps but cannot interact with their own data. Environment Maker role: Can create new resources associated with an environment, including apps, connections, custom APIs, gateways, and flows using Microsoft Power Automate. However, this role doesn't have any privileges to access data within an environment. System Customizer role: full permission to customize the environment. However, users with this role can only view records for environment entities that they create.

Question 3

Single answer

You need to handle errors in UpdateRecord.js. Which code segment should you add at line UR06?

Option A:
catch(error) { alert("Caught error: " + error.message);}
Correct
Option B:
Exception exception = Server.GetLastError() ; if(exception != null)}
Correct
Option C:
catch(exception e){ console.writeline(e)}
Correct
Option D:
function (error){ console.log(error.message)}
Correct

Show Answer & Explanation Hide Answer & Explanation

Correct Answer: A

Explanation


catch(error) {
    alert("Caught error: " + error.message);
}
Why A is correctUpdateRecord.js is a JavaScript file.

JavaScript uses the syntax 
JavaScript uses the syntax catch(error) to handle exceptions in a try...catch block.
error.message retrieves the error description.
alert() displays the error to the user.
Why the others are incorrectB ❌ Uses C#/ASP.NET syntax (Server.GetLastError()), not JavaScript.
C ❌ Uses incorrect Java/C#-style exception syntax and console.writeline is not a valid JavaScript method.
D ❌ function(error){ console.log(error.message) } is a callback function, not a catch block for exception handling.
✅ Answer: A.
catch(error) {
    alert("Caught error: " + error.message)

Question 4

Drag & Drop

DRAG DROP

You need to address the user interface issues. What should you do? To answer, drag the appropriate actions to the correct issues. Each action may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

NOTE: Each correct selection is worth one point.

Show Answer & Explanation Hide Answer & Explanation

Correct Answer

Requirement Action
Resolve rendering issue for New and Save buttons. Add `&ribbondebug=true` to the end of the application URL.
Add email button for registration form. Use Ribbon Workbench.

Requirement	Action
Resolve rendering issue for New and Save buttons.	Add `&ribbondebug=true` to the end of the application URL.
Add email button for registration form.	Use Ribbon Workbench.

Explanation

Box 1: Add &ribbondebug=true to the end of the application URL. Scenario: The captions for the New and Save buttons do not render properly on the form. You can use the an in-app tool called the Command Checker to inspect the ribbon component definitions to help us determine why the button is not rendered correctly. To enable the Command Checker, you must append a parameter &ribbondebug=true to your D365 application URL. For example: https://yourorgname.crm.dynamics.com/main.aspx?appid=9ab590fc- d25e-ea11-a81d-000d3ac2b3e6&ribbondebug=true Box 2: Use the Ribbon Workbench Adding Buttons to Ribbons Download and install Ribbon Workbench. Select a suitable ICON for your button Create a solution. Edit the button in Ribbon Workbench. Publish and test.

Requirement Mapped Action Unused Options
Resolve rendering issue for New and Save buttons. Add `&ribbondebug=true` to the end of the application URL.
* Export the XML file.

* Modify the RibbonWSS.xsd file.
Add email button for registration form. Use Ribbon Workbench.
* Export the XML file.

* Modify the RibbonWSS.xsd file.

Requirement	Mapped Action	Unused Options
Resolve rendering issue for New and Save buttons.	Add `&ribbondebug=true` to the end of the application URL.	* Export the XML file. * Modify the RibbonWSS.xsd file.
Add email button for registration form.	Use Ribbon Workbench.	* Export the XML file. * Modify the RibbonWSS.xsd file.

Question 5

Drag & Drop

DRAG DROP

You need to select connectors for the app. Which types of connectors should you use? To answer, drag the appropriate connectors to the correct requirements. Each connector may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

NOTE: Each correct selection is worth one point.

Show Answer & Explanation Hide Answer & Explanation

Correct Answer

Requirement Connectors
View full registration records. Create a custom connector.
View customer names. Use an AppSource connector.
View daily registrations. Use a native application function.

Requirement	Connectors
View full registration records.	Create a custom connector.
View customer names.	Use an AppSource connector.
View daily registrations.	Use a native application function.

Explanation

Box 1: Create a custom connector A custom connector is a wrapper around a REST API (Logic Apps also supports SOAP APIs) that allows Logic Apps, Power Automate, or Power Apps to communicate with that REST or SOAP API. Box 2: Use an AppSource connector You can only retrieve the Customer, UnifiedActivity, and Segments entities through the Power Apps connector. Other entities are shown because the underlying connector supports them through triggers in Power Automate. Scenario: Customer information is stored in the Accounts entity. Box 3: Use a native application function You must produce a report that details the number of registrations for a day and send the report as a PDF to the management team.

(Mapped Connectors & Options)
Requirement Mapped Connector Unused Options
View full registration records. Create a custom connector. * Create a connector with a Postman collection.
View customer names. Use an AppSource connector. * Create a connector with a Postman collection.
View daily registrations. Use a native application function. * Create a connector with a Postman collection.

Requirement	Mapped Connector	Unused Options
View full registration records.	Create a custom connector.	* Create a connector with a Postman collection.
View customer names.	Use an AppSource connector.	* Create a connector with a Postman collection.
View daily registrations.	Use a native application function.	* Create a connector with a Postman collection.

Free PL-400 Practice Questions

Question 1

You need to add the script for the registration form event handling. Which code segment should you use?

formContext.data.entity.addOnSave(myFunction)

formContext.data.addOnLoad(myFunction)

formContext.data.removeOnLoad(myFunction)

addOnPreProcessStatusChange

formContext.data.isValid()

Scenario: Information about upcoming tournaments must be pre-located into the registration form when the registration form loads. addOnLoad adds event handlers to the Subgrid OnLoad event event.

Question 2

You need to determine the primary cause of the issue reported by interns when they use the app. What is the primary cause?

Interns have the System Customizer security role but need the Environment Maker security role.

Interns have the Common Data Service User security role but need the Environment Maker security role.

Interns have the Environment Maker security role but need the Common Data Service User security role.

Interns have the Environment Maker security role but need the System Customizer security role.

Interns have the Environment Maker security role but need the Delegate security role.

Question 3

You need to handle errors in UpdateRecord.js. Which code segment should you add at line UR06?

catch(error) { alert("Caught error: " + error.message);}

Exception exception = Server.GetLastError() ; if(exception != null)}

catch(exception e){ console.writeline(e)}

function (error){ console.log(error.message)}

catch(error) {

Question 4

DRAG DROP

You need to address the user interface issues. What should you do? To answer, drag the appropriate actions to the correct issues. Each action may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

NOTE: Each correct selection is worth one point.

RequirementActionResolve rendering issue for New and Save buttons.Add &ribbondebug=true to the end of the application URL.Add email button for registration form.Use Ribbon Workbench.

Question 5

DRAG DROP

You need to select connectors for the app. Which types of connectors should you use? To answer, drag the appropriate connectors to the correct requirements. Each connector may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

NOTE: Each correct selection is worth one point.

RequirementConnectorsView full registration records.Create a custom connector.View customer names.Use an AppSource connector.View daily registrations.Use a native application function.

`catch(error) {`

Requirement Action
Resolve rendering issue for New and Save buttons. Add `&ribbondebug=true` to the end of the application URL.
Add email button for registration form. Use Ribbon Workbench.

Requirement Connectors
View full registration records. Create a custom connector.
View customer names. Use an AppSource connector.
View daily registrations. Use a native application function.