Exam PL-400: Microsoft Power Platform Developer — Questions and Answers

Question 1: How does the PL 400 body of knowledge relate to daily professional practice?

It only applies during certification exams
It is theoretical and has limited practical application
It provides the foundational framework that guides decision-making and standard practices (Correct answer)
It is relevant only for academic research

Correct answer: It provides the foundational framework that guides decision-making and standard practices

The body of knowledge provides the foundational framework of principles, standards, and best practices that professionals use to guide their daily decision-making, ensure consistent quality, and maintain alignment with industry standards.

Question 2: When building a custom connector that calls an Azure Function, which policy template in the connector designer lets you transform the request URL before it reaches the function?

URL encode policy
Set query parameter policy
Rewrite URL policy (Correct answer)
Set host URL policy

Correct answer: Rewrite URL policy

The 'Rewrite URL' policy template in the custom connector policy editor modifies the request path before sending it to the backend Azure Function.

Question 3: A Canvas App needs to call a custom Power Automate flow and use its return value. Which Power Fx expression correctly invokes the flow named 'GetOrderStatus'?

Flows.GetOrderStatus()
GetOrderStatus.Run() (Correct answer)
Run('GetOrderStatus')
PowerAutomate.Run('GetOrderStatus')

Correct answer: GetOrderStatus.Run()

After adding a flow to a Canvas App, it is invoked using the flow's display name followed by .Run() with any required parameters.

Question 4: A developer needs to programmatically refresh a subgrid on a model-driven app form without reloading the entire page. Which API should they call?

formContext.data.refresh()
Xrm.WebApi.retrieveMultipleRecords()
formContext.ui.tabs.refresh()
gridControl.refresh() (Correct answer)

Correct answer: gridControl.refresh()

The gridControl.refresh() method refreshes the subgrid control data without causing a full form reload.

Question 5: When using environment variables in a Power Automate solution, what is the primary benefit for ALM (Application Lifecycle Management)?

Environment variables allow configuration values to differ per environment without changing the flow (Correct answer)
Environment variables automatically sync values across all environments
Environment variables increase flow execution speed
Environment variables reduce Dataverse storage consumption

Correct answer: Environment variables allow configuration values to differ per environment without changing the flow

Environment variables store configuration values (like URLs or API keys) that can be set differently in dev, test, and production without modifying the flow itself.

Question 6: A canvas app must send an adaptive card to a Microsoft Teams channel when a form is submitted. Which connector should you use in Power Automate?

Microsoft Teams connector with 'Post an Adaptive Card to a channel' action (Correct answer)
Office 365 Outlook connector
SharePoint connector
Azure Communication Services connector

Correct answer: Microsoft Teams connector with 'Post an Adaptive Card to a channel' action

The Microsoft Teams connector provides a dedicated action to post adaptive cards directly to a Teams channel.

Question 7: A developer needs to implement offline capability in a canvas app so users can continue working without internet access. Which data source supports offline mode natively?

Dataverse for Teams
Local collections saved with SaveData/LoadData (Correct answer)
SQL Server (direct connection)
SharePoint Online list

Correct answer: Local collections saved with SaveData/LoadData

SaveData and LoadData functions store collection data in the device's local storage, enabling offline access in canvas apps.

Question 8: Which property in the OpenAPI definition controls the base URL that the custom connector uses to make API calls?

externalDocs.url
info.contact.url
host and basePath (Swagger 2.0) or servers[].url (OpenAPI 3.0) (Correct answer)
x-ms-api-annotation.url

Correct answer: host and basePath (Swagger 2.0) or servers[].url (OpenAPI 3.0)

In Swagger 2.0 the host and basePath fields combine to form the base URL; in OpenAPI 3.0 the servers array's url property serves this purpose.

Question 9: What does enabling 'Change Tracking' on a Dataverse table primarily support?

Generating audit log entries
Enforcing business rules on updates
Efficient delta synchronization with external systems (Correct answer)
Auditing column changes for compliance

Correct answer: Efficient delta synchronization with external systems

Change tracking allows external systems to retrieve only records that changed since the last sync, reducing data transfer.

Question 10: Which Power Apps formula function is used to add a new record to a collection without replacing existing records?

Update(MyCollection, {...})
Collect(MyCollection, {...}) (Correct answer)
Patch(MyCollection, Defaults(MyCollection), {...})
ClearCollect(MyCollection, {...})

Correct answer: Collect(MyCollection, {...})

Collect appends new records to an existing collection, while ClearCollect first removes all records before adding the new ones.

Question 11: Which Power Platform feature allows you to expose a Power Automate flow as a callable endpoint for external systems?

Automated cloud flow with Dataverse trigger
Scheduled cloud flow
Flow with 'When an HTTP request is received' trigger (Correct answer)
Instant cloud flow with manual trigger

Correct answer: Flow with 'When an HTTP request is received' trigger

The 'When an HTTP request is received' trigger generates a unique URL that external systems can POST to in order to invoke the flow.

Question 12: Which Power Apps formula correctly filters a SharePoint list named 'Orders' where the Status column equals 'Pending'?

LookUp(Orders, Status, "Pending")
Filter(Orders, Status = "Pending") (Correct answer)
Sort(Orders, Status, "Pending")
Search(Orders, "Pending", "Status")

Correct answer: Filter(Orders, Status = "Pending")

Filter() returns all records from a table that satisfy a condition, making it the correct choice for returning multiple matching rows.

Question 13: When should a developer use a Dataverse 'access team' instead of an 'owner team'?

When a fixed set of users needs the same security role
When record-level sharing with dynamic, per-record membership is required (Correct answer)
When the team needs to own records
When auditing team membership changes is required

Correct answer: When record-level sharing with dynamic, per-record membership is required

Access teams provide per-record sharing with dynamic membership defined by access team templates on a record-by-record basis.

Question 14: What role does collaboration play in power bi integration for PL 400 professionals?

It reduces individual accountability
It enhances outcomes through diverse perspectives and shared expertise (Correct answer)
It slows down work unnecessarily
It is only needed in emergencies

Correct answer: It enhances outcomes through diverse perspectives and shared expertise

Collaboration leverages diverse perspectives and combined expertise to achieve better outcomes than any individual could alone.

Question 15: Which formula correctly retrieves all records from a Dataverse table named 'Invoices' where the Status equals 'Open' and the Amount is greater than 1000?

LookUp(Invoices, Status = "Open", Amount > 1000)
Search(Invoices, "Open", "Status") && Amount > 1000
Filter(Invoices, Status = "Open" && Amount > 1000) (Correct answer)
Filter(Invoices, And(Status = "Open", Amount > 1000))

Correct answer: Filter(Invoices, Status = "Open" && Amount > 1000)

The Filter function with && (logical AND) combines multiple conditions and is delegable to Dataverse for server-side filtering.

Question 16: A developer needs to make a field visible only when another field has a specific value in a model-driven app form. What is the simplest approach that requires no JavaScript?

OnSave JavaScript event handler
Custom plug-in on Retrieve
Business rule with Show/Hide action (Correct answer)
Computed column in Dataverse

Correct answer: Business rule with Show/Hide action

Business rules with Show/Hide actions can conditionally show or hide fields based on field values without requiring any JavaScript code.

Question 17: Which Power Platform CLI command packages loose solution files from a directory back into a .zip solution file?

pac solution build
pac solution pack (Correct answer)
pac solution compress
pac solution export

Correct answer: pac solution pack

The 'pac solution pack' command reads unpacked solution files from a directory and assembles them into a deployable .zip solution file.

Question 18: Which API endpoint is used to retrieve a list of reports in a Power BI workspace using the Power BI REST API?

GET /v1.0/myorg/reports?workspaceId={id}
GET /v1.0/myorg/datasets/{datasetId}/reports
GET /v1.0/myorg/groups/{groupId}/reports (Correct answer)
GET /v1.0/myorg/workspaces/{id}/listreports

Correct answer: GET /v1.0/myorg/groups/{groupId}/reports

The endpoint GET /v1.0/myorg/groups/{groupId}/reports returns all reports in a specified workspace (group) via the Power BI REST API.

Question 19: Which environment variable type should be used to store a JSON configuration object in Power Platform?

JSON (Secret)
Number
Data source
Text (Correct answer)

Correct answer: Text

JSON configuration objects can be stored as Text type environment variables, as there is no dedicated JSON type — Text supports arbitrary string content including JSON.

Question 20: In the context of Power Platform ALM, what does the 'unpack' operation do to a solution file?

Extracts solution components into individual files for source control (Correct answer)
Converts a managed solution to unmanaged
Deletes unused components from the solution
Removes all customizations from a solution

Correct answer: Extracts solution components into individual files for source control

Unpacking a solution extracts its XML components into individual files that can be tracked in source control systems like Git.

Question 21: Which design principle is MOST critical for PL 400 professionals to ensure long-term viability?

Creating the most complex solution possible
Balancing functionality, sustainability, scalability, and compliance requirements (Correct answer)
Minimizing initial costs above all other factors
Using the most advanced technology available

Correct answer: Balancing functionality, sustainability, scalability, and compliance requirements

Long-term viability requires balancing multiple design considerations: the solution must function as intended, be sustainable over its lifecycle, scale to accommodate future needs, and comply with relevant regulations and standards.

Question 22: A Canvas App needs to send an email via the Office 365 Outlook connector. Which function call is correct?

SendEmail(Office365Outlook, to, subject, body)
Office365Outlook.SendEmailV2(to, subject, body) (Correct answer)
OutlookConnector.Send({to, subject, body})
Email.Send(to, subject, body)

Correct answer: Office365Outlook.SendEmailV2(to, subject, body)

The Office 365 Outlook connector exposes SendEmailV2() as the standard action for sending emails from a Canvas App.

Question 23: A Power Automate flow uses an HTTP connector to call an internal API that requires OAuth 2.0. The token must be refreshed automatically. Which approach is most appropriate?

Store the access token in a flow variable and manually refresh it
Hardcode the bearer token in the HTTP action header
Use a custom connector with OAuth 2.0 authentication configured (Correct answer)
Use a connection reference pointing to a generic HTTP connector

Correct answer: Use a custom connector with OAuth 2.0 authentication configured

Custom connectors support OAuth 2.0 configuration that handles token acquisition and refresh automatically, abstracting credential management from the flow.

Question 24: A developer wants to prevent a record from being deleted based on business logic inside a plugin. What is the correct approach?

Throw an InvalidPluginExecutionException (Correct answer)
Call context.AbortPipeline()
Set context.OutputParameters['Cancel'] = true
Return false from the Execute method

Correct answer: Throw an InvalidPluginExecutionException

Throwing InvalidPluginExecutionException aborts the operation and surfaces the message to the user as a business error.

Question 25: When configuring a canvas app for use in Microsoft Teams, which publishing action makes it available to an organization's Teams users?

Embed the app URL in a Teams tab using a Website tab
Share the app with the 'Everyone' security group in Power Apps admin center
Export the app and upload it as a Teams custom app package
Add the app to Teams using the Power Apps Teams app and publish to the org app catalog (Correct answer)

Correct answer: Add the app to Teams using the Power Apps Teams app and publish to the org app catalog

The Power Apps Teams app allows adding a canvas app as a tab and publishing it to the organizational app catalog for broad Teams access.

Question 26: A developer needs to ensure Power Pages (portals) forms do not expose Dataverse table names or column schema to anonymous web users. Which setting prevents schema exposure?

Set all Dataverse tables to private in the maker portal
Enable Azure Front Door WAF rules for the portal
Disable the Dataverse Web API for the portal
Configure table permissions to deny global read and restrict the OData endpoint (Correct answer)

Correct answer: Configure table permissions to deny global read and restrict the OData endpoint

Properly configured table permissions prevent the portal's OData endpoint from exposing table schemas or returning unauthorized records to anonymous users.

Question 27: Which approach best demonstrates mastery of power bi integration in PL 400 practice?

Avoiding complex scenarios
Following procedures without understanding
Relying entirely on technology
Applying principles to novel situations with sound judgment (Correct answer)

Correct answer: Applying principles to novel situations with sound judgment

True mastery involves understanding underlying principles well enough to apply them to new and unfamiliar situations with professional judgment.

Question 28: Which Dataverse capability allows developers to define a set of columns that are automatically populated with a sequential number when a record is created?

Formula column
Default value column
Calculated column
Autonumber column (Correct answer)

Correct answer: Autonumber column

Autonumber columns generate sequential or custom-formatted numbers automatically when records are created.

Question 29: What role does collaboration play in custom connectors for PL 400 professionals?

It slows down work unnecessarily
It enhances outcomes through diverse perspectives and shared expertise (Correct answer)
It is only needed in emergencies
It reduces individual accountability

Correct answer: It enhances outcomes through diverse perspectives and shared expertise

Collaboration leverages diverse perspectives and combined expertise to achieve better outcomes than any individual could alone.

Question 30: How often should PL 400 compliance training be conducted?

At regular intervals as required by regulations (Correct answer)
Only during initial orientation
Every five years
Only when violations occur

Correct answer: At regular intervals as required by regulations

Compliance training must be conducted at regular intervals as specified by applicable regulations to keep practitioners current.

Question 31: Which practice improves the security of power apps development implementations?

Using default credentials
Input validation and principle of least privilege (Correct answer)
Granting maximum permissions to all users
Disabling all logging

Correct answer: Input validation and principle of least privilege

Input validation prevents injection attacks while the principle of least privilege limits the damage potential of any compromised component.

Question 32: A developer is building a solution where Dataverse data changes must update a Power BI streaming dataset in near real-time. What combination achieves this?

Dataverse change tracking + Azure Data Factory + Power BI import
Dataverse plugin + Power Automate flow + Power BI push dataset (Correct answer)
Dataverse virtual table + DirectQuery dataset
Dataverse export to data lake + Power BI composite model

Correct answer: Dataverse plugin + Power Automate flow + Power BI push dataset

A Dataverse plug-in or Power Automate trigger can detect record changes and use the Power BI connector to push data to a streaming (push) dataset in near real-time.

Question 33: A developer needs to assign a record to a team rather than an individual user. Which team type in Dataverse automatically creates and manages membership based on security roles?

Access team
AAD Group team (Correct answer)
Owner team
Business Unit team

Correct answer: AAD Group team

Azure Active Directory (AAD) Group teams automatically sync membership from an AAD group and can be assigned security roles.

Question 34: What automation logic is used in step 9?

Proper automation logic 9 (Correct answer)
Manual process
Skip triggers
Repeat errors

Correct answer: Proper automation logic 9

Similar to Q1, this question refers to a specific step (step 9) in an automation workflow. "Proper automation logic 9" indicates that the design and implementation of this particular step adhere to established best practices and requirements for automation within the Power Platform. This ensures the step executes correctly, contributing to the overall efficiency and reliability of the automated process.

Question 35: Which integration method fits scenario 3?

Unstable API
Ignore integration
Unsecured link
Secure connector 3 (Correct answer)

Correct answer: Secure connector 3

For scenario 3, the correct integration method is "Secure connector 3," implying that a specific, secure connection mechanism is required for this particular integration need within the Power Platform. Utilizing a secure connector ensures that data is exchanged reliably and safely between systems, adhering to necessary authentication and authorization protocols. This approach is crucial for maintaining data security and system integrity.

Question 36: A developer is implementing a canvas app that connects to Dataverse. They want the app to always use the signed-in user's permissions rather than a shared service account. Which connection type ensures this?

Use an on-premises data gateway connection
Connect using 'Connect with the logged in user' (non-embedded) connection (Correct answer)
Use a connection reference with embedded credentials
Create a connection reference pointing to an application user

Correct answer: Connect using 'Connect with the logged in user' (non-embedded) connection

Non-embedded connections in canvas apps pass through the signed-in user's identity to Dataverse, ensuring Dataverse security roles apply per individual user.

Question 37: In PL 400 certification, what is the purpose of automated testing?

To replace manual code review entirely
To slow down development
To catch regressions and verify functionality continuously (Correct answer)
To increase server costs

Correct answer: To catch regressions and verify functionality continuously

Automated testing catches regressions early and verifies that functionality works as expected, providing confidence in code changes.

Question 38: Which action should be taken when a solution import fails in production due to a missing dependency?

Import the dependency solution first, then retry the main solution import (Correct answer)
Manually create the missing component in production
Increase the solution version number and re-export
Delete the solution and restart the import

Correct answer: Import the dependency solution first, then retry the main solution import

Missing dependency errors require importing the prerequisite solution that contains the needed component before the dependent solution can be imported successfully.

Question 39: In Microsoft Certified Power Platform Developer Associate practice, what is the CORRECT sequence when performing a technical procedure?

Execute immediately and document only if issues arise
Execute, then plan and review
Plan, prepare, execute, verify, and document (Correct answer)
Document, execute, then plan

Correct answer: Plan, prepare, execute, verify, and document

The correct sequence follows a systematic approach: plan the procedure, prepare necessary resources, execute according to standards, verify results meet specifications, and document the process and outcomes. This ensures quality and accountability.

Question 40: A flow triggers when a SharePoint list item is created. The developer wants the flow to run only if the item's 'Status' field equals 'Approved'. What is the most efficient approach?

Use a Do Until loop checking the field
Add a Condition action after the trigger
Add a Scope with a condition inside
Use a Filter Query on the trigger (Correct answer)

Correct answer: Use a Filter Query on the trigger

Using a Filter Query on the trigger prevents unnecessary flow runs by filtering at the data source level.

Exam PL-400: Microsoft Power Platform Developer

This certification validates the skills of developers to design, develop, secure, and troubleshoot solutions built on the Microsoft Power Platform.

Questions

120 min

Time Limit

70%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds