Microsoft Power Platform Developer (PL-400)

A solution architect needs to choose where to implement a calculation that must run server-side regardless of which client (canvas app, model-driven app, or Web API call) modifies a Dataverse row. Which extension point should the developer recommend?

• AA canvas app Power Fx formula on the OnSelect of a button
• BA synchronous Dataverse plug-in registered on the Update message
• CA JavaScript OnSave handler on the model-driven form
• DA Power Automate cloud flow triggered manually from the app

Your team is designing a Dataverse model that must store millions of telemetry rows per day with high write throughput and limited relational queries. Which table type best fits this requirement?

• AStandard table
• BVirtual table
• CElastic table
• DActivity table

Which Microsoft Power Platform feature should you recommend to prevent makers from combining a connector that accesses HR data with a connector that posts to the public internet within the same flow or app?

• ASecurity roles
• BData loss prevention (DLP) policies
• CField-level security profiles
• DBusiness units

You must surface read-only data from a customer's external SQL system inside a model-driven app, with the data refreshed live and not duplicated in Dataverse. Which design should you choose?

• AUse Power Automate to copy rows nightly into a Dataverse standard table
• BDefine a Dataverse virtual table with a virtual table data provider
• CImport the data using the Dataverse Import Wizard
• DUse an elastic table populated by an Azure Function

A canvas app must run a multi-step approval that includes calls to SharePoint and Outlook and must continue if the user closes the app. Where should the long-running orchestration live?

• AInside the OnSelect of a Power Fx button using Concurrent()
• BIn a Power Automate cloud flow called from the canvas app
• CInside a Dataverse business rule
• DIn a synchronous plug-in on Create

A solution requires ALM with separate Development, Test, and Production environments. Which artifact should developers use to move customizations between environments?

• AAn unmanaged solution exported and imported in each environment
• BA managed solution deployed through Power Platform Pipelines
• CAn Excel export of Dataverse rows
• DA direct database backup and restore

You need a connection string that differs in Dev, Test, and Production but is referenced by the same flow in each environment. Which solution component should you use?

• AA hard-coded value inside the flow
• BAn environment variable referenced by the flow
• CA Dataverse column populated per environment
• DA configuration row stored in a custom table queried at runtime

Your CI pipeline must export an unmanaged solution from the Dev environment, pack it as managed, and import it into Test. Which tool is purpose-built for these tasks in Azure DevOps or GitHub Actions?

• APlug-in Registration Tool
• BPower Platform Build Tools
• CConfiguration Migration Tool
• DXrmToolBox

A managed solution is installed in Production. A bug causes a column requirement level to be wrong and you applied an unmanaged hotfix directly in Production. What is the long-term ALM consequence?

• AThe hotfix becomes part of the managed layer automatically
• BThe unmanaged customization sits above the managed layer and may mask future managed upda…
• CThe hotfix is rolled back the next time the environment refreshes
• DPower Platform blocks unmanaged changes in environments containing managed solutions

Which Dataverse security construct should you use to give a help-desk team read access only to support cases owned within their region without changing the underlying security role?

• AOwner team with shared access via the Share action
• BAccess team with an access team template granting Read
• CField-level security profile
• DHierarchy security with a manager hierarchy

A canvas app loads a 50,000-row Dataverse table into a gallery and is slow on first launch. The app uses Filter() with conditions on a non-delegable function. Which technique most directly improves performance?

• AIncrease the data row limit for non-delegable queries to 2000
• BRewrite the formula to use only delegable predicates so the query runs server-side
• CAdd a Concurrent() block in App.OnStart
• DMove the gallery into a hidden container

You want to share a custom date-range picker across many canvas apps without copy-pasting screens. What is the recommended approach?

• AExport and import each app whenever the picker changes
• BBuild the picker as a canvas component in a component library and import it into each app
• CPlace the picker in a Power Automate flow
• DSave the picker XML in a Dataverse table and load it at runtime

Which Power Apps tool should a developer use to record and replay network and event traces while reproducing a canvas app issue?

• APower Apps Monitor
• BPlug-in Trace Log
• CSolution Checker
• DApplication Insights workbook

A canvas app must call a complex business calculation that lives in C#. The calculation can take up to 2 minutes. What is the most appropriate pattern?

• ASynchronous plug-in registered on the Update message of a placeholder table
• BPower Automate cloud flow that calls an Azure Function and returns when complete
• CCustom workflow activity invoked via real-time workflow
• DJavaScript Web Resource that uses fetch() to a Dataverse Web API endpoint

On a model-driven form you must hide the Credit Limit field unless the logged-in user has a specific security role. Which approach is supported and recommended?

• AUse a business rule with a Hide action
• BUse JavaScript that checks Xrm.Utility.getGlobalContext().userSettings.securityRoles and…
• CUse a Power Automate flow that runs on form load
• DUse field-level security and rely on the form to render an empty field

You need a JavaScript function to run after the user changes the Account Number field on a model-driven form, but only on the Quick Create form. Where should the registration occur?

• AOn the Account table OnLoad event with no form filter
• BOn the OnChange event of the accountnumber attribute on the Quick Create form
• COn the OnSave event of the main form
• DGlobally registered through customizations.xml

Which Client API method should you call from JavaScript to retrieve a Dataverse account row by its GUID using the Web API?

• AXrm.WebApi.online.executeMultiple
• BXrm.WebApi.retrieveRecord('account', id)
• CXrm.Navigation.openForm
• DXrm.Page.getAttribute('account').getValue

Modern command bar items can be authored using Power Fx. Which scenario specifically requires JavaScript instead of Power Fx for the command's action?

• ASetting a column value on the current record
• BCalling Xrm.WebApi.execute with a custom action that returns a complex object the caller…
• CShowing a confirmation dialog
• DRefreshing the current view

You are building a PCF code component that binds to a single Dataverse text column. Which property in the manifest declares the bound column?

• A<resources> with <code path='index.ts' />
• B<property name='value' of-type='SingleLine.Text' usage='bound' required='true' />
• C<feature-usage>WebAPI</feature-usage>
• D<control namespace='ns' constructor='ctor' />

In a PCF standard control, which lifecycle method is invoked once when the framework loads the component and is the right place to wire up DOM elements?

• Ainit(context, notifyOutputChanged, state, container)
• BupdateView(context)
• CgetOutputs()
• Ddestroy()

A PCF component must call Dataverse via the Web API. Which manifest entry must you add to enable this capability?

• A<feature-usage><uses-feature name='WebAPI' required='true' /></feature-usage>
• B<property name='WebAPI' of-type='Boolean' />
• CAdd 'webapi' to package.json scripts
• DSet RequiresWebApi attribute on the control element

You package a PCF component into a managed solution. After deploying it to a target environment, where do makers add it to a model-driven form?

• AThrough the Plug-in Registration Tool
• BVia the form designer by selecting the field, choosing Components, and adding the custom…
• CBy editing customizationsdiff.xml in Visual Studio
• DThrough the Power Automate maker portal