Microsoft Power Platform Developer Practice Test

PL-400 exam Format | Course Contents | Course Outline | exam Syllabus | exam Objectives

Exam ID : PL-400
Exam Name : Microsoft Power Platform Developer

Candidates for this exam design, develop, secure, and troubleshoot Power Platform solutions. Candidates implement components of a solution, including application enhancements, custom user experience, system integrations, data conversions, custom process automation, and custom visualizations.

Candidates must have strong applied knowledge of Power Platform services, including in-depth understanding of capabilities, boundaries, and constraints. Candidates should have a basic understanding of DevOps practices for Power Platform.

Candidates should have development experience that includes Power Platform services, JavaScript, JSON, TypeScript, C#, HTML, .NET, Microsoft Azure, Microsoft 365, RESTful web services, ASP.NET, and Microsoft Power BI.

Create a technical design (10-15%)
Configure Common Data Service (15-20%)
Create and configure Power Apps (15-20%)
Configure business process automation (5-10%)
Extend the user experience (10-15%)
Extend the platform (15-20%)
Develop integrations (5-10%)

Create a technical design (10-15%)
Validate requirements and design technical architecture
 design and validate the technical architecture for a solution
 design authentication and authorization strategy
 determine whether you can meet requirements with out-of-the-box functionality
 determine when to use Logic Apps versus Power Automate flows
 determine when to use serverless computing, plug-ins, or Power Automate
 determine when to build a virtual entity data source provider and when to use connectors
Design solution components
 design a data model
 design Power Apps reusable components
 design custom connectors
 design server-side components
Describe Power Platform extensibility points
 describe Power Virtual Agents extensibility points including Bot Framework skills and Power Automate flows
 describe Power BI extensibility points including Power BI APIs, custom visuals, and embedding Power BI apps in websites and other applications
 describe Power Apps portal extensibility points including CRUD APIs and custom styling
Configure Common Data Service (15-20%)
Configure security to support development
 troubleshoot operational security issues
 create or update security roles and field-level security profiles
 configure business units and teams
Implement entities and fields
 configure entity and entity options
 configure fields
 configure relationships and types of behaviors
Implement application lifecycle management (ALM)
 create solutions and manage solution components
 import and export solutions
 manage solution dependencies
 create a package for deployment
 automate deployments
 implement source control for projects including solutions and code assets
Create and configure Power Apps (15-20%)
Create model-driven apps
 configure a model-driven app
 configure forms
 configure views
 configure visualizations
Create canvas apps
 create and configure a canvas app
 implement complex formulas to manage control events and properties
 analyze app usage by using App Insights
 build reusable component libraries
Manage and troubleshoot apps
 troubleshoot app issues by using Monitor and other browser-based debugging tools
 interpret results from App Checker and Solution Checker
 identify and resolve connector and API errors
 optimize app performance including pre-loading data and query delegation
Configure business process automation (5-10%)
Configure Power Automate
 create and configure a flow
 configure steps to use Common Data Service connector actions and triggers
 implement complex expressions in flow steps
 implement error handling
 troubleshoot flows by analyzing JSON responses from connectors
Implement processes
 create and configure business process flows
 create and configure business rules
 create, manage, and interact with business process flows by using server-side and clientside code
 troubleshoot processes
Extend the user experience (10-15%)
Apply business logic using client scripting
 create JavaScript or Typescript code that targets the XRM API
 register an event handler
 create client-side scripts that target the Common Data Service Web API
Create a Power Apps Component Framework (PCF) component
 describe the PCF component lifecycle
 initialize a new PCF component
 configure a PCF component manifest
 implement the component interfaces
 package, deploy, and consume the component
 configure and use PCF Device, Utility, and WebAPI features
 test and debug PCF components by using the local test harness
Create a command button function
 create the command function
 design command button rules and actions
 edit the command bar by using the Ribbon Workbench
 manage dependencies between JavaScript libraries
Extend the platform (15-20%)
Create a plug-in
 describe the plug-in execution pipeline
 design and develop a plug-in
 debug and troubleshoot a plug-in
 implement business logic by using pre and post images
 perform operations on data by using the Organization service API
 optimize plug-in performance
 register custom assemblies by using the Plug-in Registration Tool
 develop a plug-in that targets a custom action message
Create custom connectors
 create a definition for the API
 configure API security
 use policy templates to modify connector behavior at runtime
 expose Azure Functions as custom connectors
 create custom connectors for public APIs by using Postman
Use platform APIs
 interact with data and processes by using the Common Data Service Web API or the
Organization Service
 implement API limit retry policies
 optimize for performance, concurrency, transactions, and batching
 query the Discovery service to discover the URL and other information for an organization
 perform entity metadata operations with the Web API
 perform authentication by using OAuth
Process workloads
 process long-running operations by using Azure Functions
 configure scheduled and event-driven function triggers in Azure Functions
 authenticate to the Power Platform by using managed identities
Develop Integrations (5-10%)
Publish and consume events
 publish an event by using the API
 publish an event by using the Plug-in Registration Tool
 register service endpoints including webhooks, Azure Service Bus, and Azure Event Hub
 implement a Common Data Service listener for an Azure solution
 create an Azure Function that interacts with Power Platform
Implement data synchronization
 configure entity change tracking
 read entity change records by using platform APIs
 create and use alternate keys

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Question: 73
HOTSPOT
You are developing an app for a sales team to record contact details in their Common Data Service (CDS) database. The app must handle loss of network and save the data to CDS when reconnected.
The main screen of the app has a form to collect contact data and a button. The OnSelect property for the button has the following expression:
For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point.
Answer:
Explanation: Box 1: Yes
LoadData and SaveData combine to form a simple mechanism to store small amounts of data on a local device. By using these functions, you can add simple offline capabilities to your app.
Box 2: No
Box 3: No
Box 4: Yes
Question: 74
You need to identify the execution mode that is being used for the ISV solution reported by User5. Which type of execution mode is in use?
1. asynchronous
2. atomicity
3. transfer
4. synchronous
Answer: D
Explanation:
User5 receives the error message: �Endpoint unavailable� during a test of the technician dispatch ISV solution.
When you choose to use a synchronous execution mode any failure will be reported back to the user of the application with an Endpoint unavailable error dialog informing the user that the webhook service endpoint may be configured incorrectly or is not available.
Reference: https://docs.microsoft.com/en-us/powerapps/developer/common-data-service/use-webhooks
Question: 75
You need to ensure that users can create the required charts.
Which two actions should you perform? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point.
1. Create a quick view form to show the Accounts entity.
2. Configure filter fields in the Annual revenue field.
3. Add the Facility field to the account form.
4. Delete the Annual revenue field from the account form.
5. Create a view with annual revenue sorted lowest value to highest value.
Answer: B,C Explanation:
Pharmacy orders must be displayed in four graphs as follows: Annual revenue over $100,000
Annual revenues under $100,000 Research facilities
Hospitals
The graphs must be interactive, and users must be able to drill down on any dimension.
Question: 76
DRAG DROP
You need to assign security roles to groups of users.
Which security roles should you use? To answer, drag the appropriate security types to the correct roles. Each security type 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.
Answer:
Explanation:
Graphical user interface, text, application Description automatically generated
Scenario: The company identifies the following job roles:
You must grant users the minimum permissions required to perform their job tasks. Intern: Environment Maker
Environment Maker: 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. Manager: System Administrator:
System Administrator: Has full permission to customize or administer the environment, including creating, modifying, and assigning security roles. Can view all data in the environment.
Sales representative: Common Data Service User
Basic User/ Common Data Service User: Read (self), Create (self), Write (self), Delete (self)
Can run an app within the environment and perform common tasks for the records that they own.
Question: 77
You need to modify the Power Automate flow to resolve CustomerC�s issue. What should you do?
1. Add a configure run that is set to is successful.
2. Add a data operation that specifies the false conditions.
3. Add a condition containing approval hierarchy.
4. Add a timeout setting to the approval flow.
Answer: C Explanation:
Scenario: CustomerC requested additional information from the parts department through the customer survey and has not received a response one week later.
Reference: https://docs.microsoft.com/en-us/power-automate/sequential-modern-approvals
Question: 78
HOTSPOT
You are training a group of makers to use Power Automate. You have the following expressions:
You need to identify what each expression is doing.
What does each expression do? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Answer:
Explanation: Text
Description automatically generated Box 1: Return the statuscode at runtime.
You could try the following method to get the status code.
Configure Compose action under the specified action to get the status code. outputs(�ActionName�)[�statusCode�] Box 2: Return all the results from all actions from MyScope
The @result() expression accepts the name of a Scope as a parameter and returns a JSON array of objects that represent the results of the execution of each action within the Scope.
Question: 79
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than once correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You are designing a one-way integration from the Common Data Service to another system.
You must use an Azure Function to update the other system. The integration must send only newly created records to the other system. The solution must support scenarios where a component of the integration is unavailable for more than a few seconds to avoid data loss.
You need to design the integration solution.
Solution: Register a webhook in the Common Data Service that connects to the Azure Function. Register a step on the webhook which runs synchronously on the record�s Create message and in the post-operation stage.
Does the solution meet the goal?
1. Yes
2. No
Answer: B Explanation:
Instead use asynchronous communication.
Question: 80
You need to reduce response time for the information email on the website. What should you create?
1. A flow that create a notification in Microsoft Teams
2. A power Apps app that displays the number of emails received in a dashboard
3. A flow that creates a SharePoint item for each email response
4. Logic app that moves all emails received to Azure Blob storage.
Answer: A Explanation: Scenario:
Customers report that the response time from the information email listed on the Adventure Works Cycles website is greater than five days.
Microsoft Teams is used for all collaboration.
Question: 81
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution,
while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
An organization has an Azure SQL Database instance that must be synchronized daily with data from Dynamics 365 Sales. A large amount of data might need to be synchronized on some days.
You need to reduce the time required to synchronize data. Solution:
Enable change tracking for entities that will be synchronized.
Use the Data Export Service to sync data between the database and Dynamics 365 Sales. Does the solution meet the goal?
1. Yes
2. No
Answer: A Explanation:
Large organizations that synchronize their data with external data sources can now enable entities for change tracking. You can export or retrieve a selected set of data, and then keep the external data warehouse in sync.
The Data Export Service is an add-on service made available on Microsoft AppSource that adds the ability to replicate data from Common Data Service database to an Azure SQL Database store in a customer-owned Azure subscription.
The Data Export Service intelligently synchronizes the entire data initially and thereafter synchronizes on a continuous basis as changes occur (delta changes) in the system.
You can use the Data Export Service with model-driven apps in Dynamics 365, such as Dynamics 365 Sales and Dynamics 365 Customer Service.
Reference: https://docs.microsoft.com/en-us/power-platform/admin/enable-change-tracking-control-data- synchronization
https://docs.microsoft.com/en-us/power-platform/admin/replicate-data-microsoft-azure-sql-database
Question: 82
HOTSPOT
You are developing a Power Platform solution. You plan to add three buttons to a form. The buttons have the following requirements:
You need to complete each button�s action.
Which commands should you use? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Box 1: Now() only.
The Now function returns the current date and time as a date/time value. Box 2: Switch() or IF()
If and Switch functions in Power Apps determines whether any condition in a set is true (If) or the result of a formula matches any value in a set (Switch) and then returns a result or executes an action.
Box 3: isMatch( TextInput1.Text,"emergency",Contains & IgnoreCase ) Example: IsMatch( TextInput1.Text, "hello", Contains & IgnoreCase ) Tests whether the user�s input contains the word "hello" (case insensitive).
Question: 83
DRAG DROP
An international organization has a series of client-server applications that manage red light cameras and traffic violations across a wide geographic region. The daily volume of traffic violations is very high and growing.
You plan to use Microsoft Power Platform apps to manage the following types of data:
Existing vehicle licensing data must be imported into Common Data Service and easily queried. Red light camera images must be stored in a repository for later analysis.
Information about traffic violations must be stored and related to vehicle details. You need to select data storage mechanisms for the new apps.
Which data storage mechanisms should you use? To answer, drag the appropriate data storage mechanisms to the correct data types. Each storage mechanism 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.
Answer:
Question: 84
You need to configure the trigger for the priority field in the Account entity. Which expression should you use?
1. DIFFINWEEKS(now,1)
2. SUBTRACTDAYS(10, Now())
3. ADDWEEKS(1, CreatedOn)
4. DIFFINDAYS(Createdon, now())
5. ADDDAYS(10, CreatedOn)
Answer: C Explanation:
A trigger must be created that changes the Priority field to 1 in the Account record 10 days after an Account record is created.
Note:
Date.AddWeeks returns the date, datetime, or datetimezone result from adding numberOfWeeks weeks to the datetime value dateTime.
CreatedOn gets the value to store in the history table indicating when this entry was created. Reference:
https://docs.microsoft.com/en-us/powerquery-m/date-addweeks
https://docs.microsoft.com/en-us/dotnet/api/system.data.entity.migrations.model.inserthistoryoperation.createdon? view=entity-framework-4.3.1
https://docs.microsoft.com/en-us/dotnet/api/system.data.entity.migrations.model.inserthistoryoperation.createdon? view=entity-framework-4.3.1

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