PowerApps Interview Questions

In today's world, most firms are seeking experts who are skilled in Microsoft PowerApps and Power Optimize. Low-code implementations have grown in popularity due to their ease of advancement and lack of significant coding skills.If you're unique and want to learn further about PowerApps and Power Automate, this guide will get you up and running quickly. This guide includes expert-curated frequently asked PowerApps interview questions for basic and advanced levels. Let's get this started.

Frequently asked powerapps interview questions for basic level:

1.What are power apps?

At its heart, PowerApps is regarded as a Platform as a Service. It allows users to create Mobile Apps that can run on various platforms such as Android, iOS, Windows (Modern Apps), but almost any Web browser. Power Apps is a collection of apps, services, adapters, and data platforms which help to provide an agile development environment to enable custom software based on business requirements.With Power Apps, you can rapidly create custom business applications that communicate to your company's data, that is deposited either from the underpinning data platform (Common Data Service) or in multiple internet and on-premises data sources (SharePoint, Excel, Office 365, Dynamics 365, SQL Server, and so on).

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2. What exactly is a collection? What is the procedure for developing a collection?

Collection is a form of data source which is said to be local to the app and it will not be attached to a cloud service. A collection data was said to have been local to the device when it cannot be communicated across devices for the same or different users. Collections can be saved and recovered from the device locally. Collect, ClearCollect, and Clear are a few features which can be used to deceive collections.

3. Explain briefly how to define and use a local or global parameter in power apps.

You must use the Set feature to set the parameters of a global variable, which will keep a bit of information briefly, such as the amount of times the user can choose a button or even the outcome of the data operation.

You must use the UpdateContext function to create a context variable, which will temporarily hold data such as the number of times the user will select a button or the result of the data operation.

4. What exactly is Common Data Service?

Using Common Data Service, users will be able to safely maintain the data used by enterprise applications. The information stored in the Common Data Service is in accordance with a set of entities. An entity is a collection of records which are used to store data, comparable to a table that contains data in a database.Common Data Service also includes a base number of predefined entities that encompass the most common topics, and you can also build custom entities that are unique to your company and initialize them with data using Power Query. PowerApps will be used by app developers to create rich applications based on this data.

5. What are the main differences between the Canvas App and the Model-driven App?

Canvas Apps: Canvas Apps seem to be apps that begin your customer experience, enabling users to create a custom customized interface with power of a blank slate and communicate it to at least 200 data sources. You can also create canvas apps for web, mobile, and tablet applications.Canvas apps give you the freedom to customize the user experience and interface in any way you see fit. It also means allowing your originality and business knowledge to participate and advise you in deciding how your apps should be represented.

Model-driven Apps: Model-driven Apps would be those which begin with your database schema, which will be built up from the form of your key business systems and information in the CDS to model forms, views, and many other components. Model-driven apps might very well generate great user interfaces that really are attentive across devices. Once you generate a model-driven app, you can use the Common Data Service's full power to quickly configure your forms, business rules, and process flows. You can also download model-driven apps from the Power Apps site. 

Related Article: PowerApps Canvas !

6. Is Flow dependent on Power Apps or the other way around?

No, and it is very easy to become confused about this. PowerApps is the new form of the solution, a quick and easy web-based or device-agnostic method for creating a mobile-oriented application that is routed to SharePoint for forms. It also makes extensive use of the Flow, but it is not required. Flow, on the other hand, can use Power Apps and is frequently using PowerApps as a frontend for what it does, but it does not require Power Apps.

7. What is the difference between an Action and a Trigger in MS-Flow?

Adjustments aimed directly by a User are referred to as actions. For example, you can use an action to perform SQL Database operations such as lookup, update, and delete data. All actions will be directly mapped to Swagger operations.

Triggers: Several connectors include triggers that will notify your app when certain events occur. Consider the case of an FTP connector with the OnUpdatedFile trigger. You can create a Logic App or a flow that listens for this trigger and takes action whenever it fires.

Triggers are classified into two types.

Polling Triggers: These triggers can call your service at a specific frequency to check for new data. When new data becomes available, it will trigger a new run of your workflow instance with the data as input.

Push Triggers: Such triggers can pay any attention to data on an endpoint, which means they will wait for an event to happen. When the event occurs, your workflow instance is restarted.

8. How do I use the canvas components in my apps?

Components are recyclable building blocks for canvas apps, allowing app developers to create custom controls and reuse them across apps. Components can be exported and imported in a variety of apps across organizations. The Parts are useful because they allow you to create larger apps with the same control patterns. For example, we can create a navigation control and use it across multiple screens in our app.When you notify a component, your adjustments will be reflected in all instances of the app. Components ensure that performance is enhanced or improved, and they also aid in standardizing the look and feel of PowerApps applications throughout an organization. A component also includes input properties that can receive values from the app and that the component can use internally. Components also include output properties, which can provide output values to the app.

9.What are the various methods for submitting data from the power apps?

The Patch() and Submitform() functions can be used to submit data. The Patch() function can be used to perform a partial data update.

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10.How can a different user environment be created in PowerApps?

An environment is a location for storing, managing, and sharing your organization's business data, apps, and flows. It is also regarded as a container capable of dividing apps with varying roles, security requirements, or customer demographics. The use of the environments is determined by your organization and the apps that you are attempting to develop.

11.Is it essential to combine various data sources into a single canvas app?

Yes, it is. Power Apps allows you to create an unlimited number of connections. Once the connections are formed with an account, you can use an unlimited number of data sources in a single app.

12. What is Microsoft PowerApps?

Ans. Microsoft PowerApps is a suite of apps, services, and data platforms and a Platform-as-a-Service that allows users to build different types of Mobile Apps. These mobile apps can operate on different platforms such as Android, iOS, Windows, and on any Web browser. Moreover, PowerApps provide you with an agile development environment to quickly develop power software apps to meet your business needs. 

13. What are the various features of Microsoft PowerApps?

Microsoft PowerApps includes Flow and other Office 365 automation technologies that offer many features and tools. They help you to build power apps without coding. These are some of the important features of MS PowerApps:

  • The PowerApps includes many sample apps for use and allows customization as per need.
  • Power Apps hold a collection of 200+ connectors to integrate data and systems.
  • It offers a simple drag-and-drop designer interface for developing apps.
  • It is strongly connected with other apps like Dynamics and Office 365 tools.
  • Microsoft Power Apps has a robust infrastructure including a strong community.

14. Explain the main components of PowerApps?

Ans. PowerApps is a digital business app-building platform that helps us with the following primary components:

  • Canvas apps.
  • Model-driven apps.
  • Microsoft Dataverse.
  • Portals.

Further, there are some other components available that are useful in creating apps. Such as Gallery, Card, Screen, Function, Property, and Control. These components help you to develop apps with all the functions.

15. Distinguish between Canvas and Model-Driven Apps?

Ans. Model-driven Apps: Model-driven apps, on the other hand, use a component-based procedure to develop an outstanding app. Here, the dashboards,  charts, views, business processes, forms, entities, etc. are some of the major elements that help to build a better UI. 

Model-driven apps will develop super user experiences that are accessible throughout the devices automatically. 

You can also use the PowerApps portal to create model-driven apps. Also, these apps can only connect and interact with a single data connection i.e. Data Verse.

Canvas Apps: Canvas apps give the best user experience and allow users to customize using different UI features like charts, media, drop-down lists, text-input boxes, labels, and many more. You can also develop canvas apps to use on the web, mobile phones, and tabs for different purposes. 

Moreover, Canvas apps also allow you to use your imagination and experience to help you decide the apps you want to present in a manner. Further, Canvas apps can connect with more than 300 connectors to provide its users with many useful functionalities.

16. Is it possible to build Microsoft Power Apps without having a license?

Ans. No. Without having a license, neither the creation nor the consumption of PowerApps is possible. But if you want to try all other features for free, you can join a 30-day PowerApps trial plan. 

17. What are Common Data Services (CDS) and their uses?

Ans. In common data services (CDS), data collected from different sources are combined into single data storage. This single data storage can be used in Power BI, Power Automate, and PowerApps. Hence, this service makes the app-building process much smoother. 

Further, the CDS enables users to store and manage data well. This data is also securely used by various business apps for different purposes. The data that is saved in the Common Data Service is further arranged into a set of entities. 

Here, an entity is a set of records used to store data in a way the table does in a database. Moreover, this data service includes a set of basic entities that will drive most incidents. 

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18. When can you use Model-driven apps rather than Canvas apps as a consultant?

Ans. Model-driven apps are useful when the data is only managed with Dataverse-defined tables. These apps can only connect with the Data Verse connection.

19. How can you make the Canvas Apps more accessible?

Ans. You can make this through the height and width feature of the available app screens. Also, there is an availability of Container controls for this.

20. Explain the different methods of submitting data from PowerApps?

Ans. There are two important functions- Patch() and Submit form which can be used for data submission. Besides, the Patch() function is useful to upload partial data.

21. Can we access local area network data sources through Power Apps?

Ans. Yes, it is possible to connect to local network data sources easily using PowerApps.

22. How can you share a canvas app with external business partners & contractors?

Ans. Yes, it is possible to share. Here, the visitor users can be invited to use the Canvas app through Azure AD B2B external partnership for a tenure.

23. Define the different types of apps that PowerApps can develop?

Ans. Using Microsoft Power Apps, the various apps that can be developed are- Canvas apps, Model-driven apps, Common Data Services (CDS), and portals.

24. Define the various options for using media files in the Canvas app?

Ans. Using PowerApps you can upload up to 200 MB of media files for each application. However, it is suggested that you can hold media or blog storage services such as Azure Media or Storage, and fix the media URL within the app.

25. What do you mean by collection in PowerApps?

Ans. A Collection is a unique form of data source which is local to the app and not connected to a cloud service. This is generally used as the device's local storage and is easily shared between devices with one or many users. You can also access them locally. Further, to manage collections Clear function, ClearCollect, and Collect functions are mainly used.

26. Explain how to create separate user environments in Microsoft PowerApps?

Ans. An environment is a location where data, apps, and other business processes are stored, supervised, and shared. We can also call it a container that isolates apps as per their target audiences, security needs, and tasks. Further, the creation of an environment to be used mostly depends on the company and the apps you mean to develop.

27. Explain how you use a local or global variable in Power Apps?

Ans. in order to set the value of the global variable, we use the “Set” function. This function stores a section of data temporarily, like the result of operational data or a button that has been pushed several times. Then the content variable is developed using the “UpdateContext” function. This variable holds data temporarily. Thus, the local variables or context variables are entirely available on that screen. Here, you cannot access the value from any other screen.

28. Is it possible to use many data sources in a single canvas app in PowerApps?

Ans. Yes, you can use it. You can make any number of connections through PowerApps. Once they're made through an account, then you can use a number of data sources within a single program.

29. Does Flow rely on Microsoft PowerApps, or PowerApps rely on Flow?

Ans. Simply, we can say that PowerApps is a new version of the solution. Further, it allows users to develop a mobile app that is routed to SharePoint for forms. PowerApps widely uses the Flow, but it is not much required. But Flow can use PowerApps and does so usually for its task but it doesn’t need them.

30. Explain the various license options available for the MS Power Platform's Storage attributes?

Ans. There are three types of licenses available for the MS Power Platform’s storage capacity:-

  • Dataverse for Apps Database (DB) volume.
  • Dataverse for Apps Log capacity.
  • Dataverse for Apps File space.

31. How to create a clear or distinct user environment in Microsoft PowerApps?

Ans. An environment is a location where you can store, manage, and share business data, apps, and flows as well. You can call it a container that can be used to isolate programs with clear roles, security needs, etc. The way to use the environments is set by your company and the apps you're thinking of building.

32. What are the benefits of using Power Apps?

Ans. You can manage workflow, data visualization, automation, reporting, and other activities through PowerApps. It can also involve your teams, field workers, top management, and your consumers. 

Also, you can access PowerApps through a mobile app, a website, or using an Office 365 product.

There are many other ways to automate business activities, which include many PowerApps-based solutions. These are- 

  • Application for new employees’ onboarding process.
  • It speeds up the business changes required.
  • Frameworks of new user configuration 
  • Completely secured apps for usage

33. Define the concept of security roles in Microsoft PowerApps?

Ans. In Microsoft Power Platform (PowerApps), Security Roles are used to provide consent levels for definite users or teams in the entity. It requires setting up the rights and access levels for each security role in the Power Platform.

Further, the security roles can also be used to configure access to particular applications and data within the space. Also, the security roles well manage a user's access to an environment's resources using a group of access levels and consent.

The restrictions on the user's view of apps and data, and their relation with the data, are determined by the blend of access levels and consent. These are specified within a security role.

34. What is the use of Patch Function in canvas apps in PowerApps?

Ans. Users are allowed to build their power apps using the canvas app. Power platform users can choose any of the functions from a list of functions in PowerApps they want to use.

Further, the “if-then” statement is useful in the PowerApps patch function where users can mix different power apps into a single Power App.

35. Which types of companies should use Microsoft PowerApps?

Ans. Microsoft PowerApps platform is designed for all types and all sizes of companies.. It also allows users to design tailored apps to their specific needs. And this is applicable to all enterprises- small, medium, and large. Thus, regardless of the industry, you can use PowerApps.

36. Explain the use of DLP Policies in PowerApps?

Ans. DLP stands for Data Loss Prevention policies which we can design. These policies act as guardrails to keep business data from being revealed accidentally. To use this feature, you must be in the role of tenant admin or have the Environment Admin role.

37. Is it required to learn to code for app creation?

Ans. The Microsoft PowerApps platform was developed to allow all people who aren’t programmers to create their apps. So, learning to code is not required or necessary. To build an app easily, you can use the PowerApps library to get one of the many pre-defined templates available. It helps you to personalize or customize it to build an app that is useful for your needs.

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38. Define some examples of Microsoft Power Apps Use Cases?

Ans. You can use the PowerApps platform to build apps that help you to gather data more efficiently on a daily basis.

For ex- You can develop an application that enables you to complete the following tasks:

  • Build an easy solution for employees to enter data about their working hours daily.
  • Getting expense accounts from each employee also can help you manage various expenses more efficiently.
  • PowerApps are different from legacy developments which have the benefit of being able to be produced and released quickly. Thus, now businesses can respond to their customers' needs very swiftly.

39. Explain Dataverse?

Ans. It is a type of data platform within Microsoft PowerApps that helps you store and model business data. MS Dynamics 365 apps are built on the Dataverse platform. if you're a Dynamics 365 customer, then you can find your data in Dataverse easily.

Here, you can easily manage and store data with security in a group of standard and custom tables. You can also add columns further as per your need.

40. What are the Microsoft PowerApps Portals and their use?

Ans. The Power Apps Portals is a new type and it focuses more on website design. In other words, a PowerApps Portal is a web design where the Canvas app is to app design.

Here users can simply develop external-facing websites with a simple studio and reveal data to customers and vendors (like guest visitors). If you are technically strong, then you can play with CSS.

Further, PowerApps Portals and model-driven apps have a lot of common features in that they're both built on Dataverse.

41. Define the various benefits of the PowerApps Portal?

Ans. The following are the various benefits of the PowerApps Portal such as:-

  • It increases satisfaction among its customers, partners, and employees.
  • Easily combines with MS Power BI and other Microsoft apps, like SharePoint, and provides an added value.
  • Gives improved business results in terms of better, faster, and much more informed decision-making.
  • Strengthens security features and efforts to secure crucial and sensitive client data.
  • Moreover, it easily engages with external users or visitors as it allows safe access to your data for all users. Also, it gives access through commercial authentication services like Facebook, LinkedIn, Microsoft, or other enterprise service providers.
  • It also connects and integrates user data to add forms, charts, dashboards, etc. to the portal.

42. How can you verify the versioning of a canvas app in a collaborative setting when there are regular updates?

Ans. We can leave a version-specific message or a comment while saving the application. We can also put a visible label on the app's Home screen that denotes a version number. This allows the app maker to manually update any data.

43. Explain what Microsoft PowerApps cannot do and what puts it apart From Others?

Ans. Microsoft Power Apps are designed & developed to use within a company/business. It improves the app’s scalability, validity, and performance while developing a business app makes it easier. In other words, PowerApps, in conjunction with Microsoft Flow and Power BI, indicates the greatest solution for small business entities since it scales as the company grows. 

Because Microsoft Power Apps cannot be shared with others, they are not for public use. It also follows ”no-code” features which means no further JavaScript or HTML can be added to the app. This feature improves the overall development speed of an app. But there are some limitations for developers to use only inbuilt templates and connectors for the app growth.

44. How can we connect to SharePoint from a canvas app in PowerApps?

Ans. You can connect to a SharePoint site to produce an app instantly from the available custom list, or build a connection before adding data to your app or building a new one.

You can use the following methods, depending upon your stored data:

  • Go to “SharePoint Online” or the website, and display data from a custom list available.
  • Then within the library, you can display images and play video or music files (at SharePoint Online).
  • Microsoft PowerApps can build a three-screen app for your use if you want to manage data on the custom list. Here, on the 1st screen, you can explore the list; on the 2nd screen, view item information; and on the 3rd screen, you can create/develop things as per your choice.

In the 2nd method, build a secure connection:

  • Sign in to the PowerApps platform, then go to the - Data > “Connections” option in the left menu bar, then select the > “New connection” option in the upper-left corner.
  • Now, choose the “SharePoint” app.
  • Next, you have to perform one of the following steps:
  • Select > Connect directly > then select Create > then provide user credentials to connect to SharePoint Online. After you've created the secure connection, you have two options 1) either you can add data/information to an existing app or 2) start creation from scratch.
  • Select “Connect” using the website data gateway. Then, select “Windows” as the authentication/validation type and enter the user credentials there. 
  • Next, you need to select the gateway under > Choose a gateway > and then click > Create option.
  • After you build a secure connection with the app, you can add data to a current app or you can start from scratch.

45. How do you define the error function in PowerApps?

Ans. When a record of a data source is changed or altered, errors can occur. Further, network failures, insufficient consents, and edit conflicts are all the major possibilities here for errors.

The Patch and other data functions in the PowerApps do not return errors directly. But they return the result of their activity. Here, you can use the function called “Errors” to get the details of any errors that take place after a data function is over. The [IsEmpty] function in the formula IsEmpty( Errors (...) ) can also be used to verify the errors or bugs. You can use the “Validate and DataSourceInfo” functions to prevent some mistakes/errors that may take place. For extra information about working with errors or to avoid errors, see the Working with Data Sources section.

The function “Errors” returns a table of errors/mistakes with the following columns:

  • Record: This is a data source record that includes the error/mistake. This field should be left blank if the error/mistake took place during the record-building process.
  • DataSource: The data source is a must-have function for which you would like to get error/mistakes messages.
  • Column: In case, the error can be traced back to a single column, here is the column that produced the error. Otherwise, you can leave this blank.
  • Record: The function is optional for the users.
  • Message: This is truly an explanation of the problem. This error can be displayed to the end-user. 

Error: This is a code or function that can be used in formulas to assist in finding a solution to the problem.

46. In Microsoft Power Apps, how can you cache data?

Ans. You can access this feature through the website > https://make.PowerApps.com > Apps > Other > Choose your Portal app and then click on “Settings” and then “admin” from the drop-down menu. Then you need to select “Portal Actions” from the left side menu and select the “Restart” option. Here, the website application service will be restarted as per instructions, and the server-side cache will be cleared automatically.

47. How to store an attachment in Microsoft PowerApps?

Ans. To enable attachments, you must need the following:

  • Select the forms to which you want to add attachments in PowerApps.
  • Then, open the data panel by clicking on the “Data” option from the properties pane.
  • You need to find the “Attachment” field from the list of fields. Then you can make it “on” for further or future use.
  • Remember to take a backup (Copy) of your application and then publish it.

48. Explain the important difference between PowerApps and Power Automate?

Ans. The Power Apps is a form of design tool, whereas MS Power Automate is a workflow and an automation program for automating processes. Both are individual items that can be mixed and matched depending upon the use.

49. What are the steps to add components to a canvas app?

Ans. To get started, go to PowerApps Studio on the PowerApps platform.

  • Here, you can create a new canvas app or update the existing app with the code component.
  • Select the “Add” option in the left pane, and then click on “Get” more components in the right pane.
  • Next, you select the >Code tab> and then select a component from the list & click the “Import” option.

50. Explain the use of the Microsoft PowerApps Loading Spinner?

Ans. In the Microsoft PowerApps platform, the “Loading Spinner” is an animated element that shows loading is ongoing. The spinner will display if the data loading takes a very long time to load. This means it assists in notifying the user that the process is busy and it may take some time to pop up.

In the Advanced tab, you can find that Microsoft offered a property called "LoadingSpinner” as a Dropdown in the top left of the app.

Further, when a user sets the “loading spinner” feature to data, the spinner will pop up anytime a user opens the screen.

51. How can you enhance the performance of your PowerApps?

Ans. To increase the PowerApps’ performance, the following methods can be used:

  • Limit the Data Connections: Avoid using the same app to connect with more than 30 data sources. 
  • Minimize the controls used: Don’t add more than 500 controls to a single application. 
  • Keep away from screen-to-screen control dependency: Try to keep away from the screen-to-screen formula reliance. 
  • Enhance the OnStart property's conduct: In case, the data doesn't change or alter during the user session, then use the function “ClearCollect” to cache it locally. 
  • Cache data from lookup: To stop continuous recovery of data from the source, use the “Set” function to cache data from lookup tables locally. 
  • Use the delegation: Instead of recovering data to the local device to process the same, use the functions that assign the data processing to the data source. 
  • Avoid using the same formula repeatedly. 
  • The “delayOutput” function should be authorized for all Text input controls within the PowerApp.

52. What are the drawbacks or limitations of using Microsoft Power Apps?

Ans. MS PowerApps has the below drawbacks or limitations:

  • In Microsoft 365, licensing a product is restricted.
  • It has a complex licensing scheme.
  • Microsoft PowerApps is costly.
  • There is a limit to allowing items.
  • The SharePoint app as a back-end will function perfectly only with attachment control. Here, the attachment control will be disabled upon the usage of SQL. 
  • Limited support for different device sizes and screen orientations.
  • JavaScript doesn’t support MS Power Apps forms.

53. In what coding language is Microsoft PowerApps written?

Ans. Microsoft Power Fx is used to express logic across the MS Power Platform because it is a low-level coding language. Hence, the same coding language is used in today's Microsoft PowerApps canvas programs, and the same is inspired by MS Excel. This was mentioned by a Microsoft Program Manager.

54. Define Datastore And its Working strategy? What type of events does it Support today or No Longer Support?

Ans. DataStore is a statistics window that we cannot see. If you want to recover certain records from a desk without displaying them, then you may pass for a statistics store with the app. It no longer guides or supports clicked events, but now it helps in functions like deleting row (), inserting a row (), retrieving a row (), and updating a row ().  Further, it also supports the event called Item Error () within the Powerapps.

55. What is a Combo Box in PowerApps and what separates it from the Drop-down?

Ans. In the MS Power Apps canvas software, a combo box is a control form that allows you to search for the items you wish to select. Moreover, as the search for items takes place on the server, the execution of the search tool doesn’t affect it. When you look for items to pick up, you can alter the Layout options within the Data pane. This helps you to present a single data value, two values, at a time, or an image and two values for each item.

There is another kind of control present in PowerApps is a drop-down menu. This drop-down control saves screen space, which is especially useful when there are a lot of options available in the list.

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56. In which conditions does the power app/automate run? In MS Power Apps, how can you get impersonation or overhead privileges?

Ans. The MS PowerApps run in the condition of the existing user of the app.

If your flow is activated through an automatic event, it will always operate in the condition of the owner of the flow. Manually, flows can also be activated that start with a button in an MS PowerApp. Nonetheless, it executes in the conditions when a person clicks the button.

Even though there is no default impersonation or action imitation in the app. Here, we can build two types of flows in which Flow A is called when the PowerApp button is pressed and passes HTTP request data to Flow B. This happens when we pass critical data to the business logic, it loses all context knowledge and imitates the user.

57. Define the method to export to excel in PowerApps?

Ans. Due to no direct function in PowerApps to do this, we need to use a flow to export.

The steps are here:-

  • You need to create a button in Microsoft PowerApps. Then connect the same to a flow when the button is pressed.
  • Now, pass “JSON” data to the flow as a variable, and to save this data to excel on a SharePoint site, use the “create CSV” and “create file” steps within the flow. 
  • Then, if you want to communicate back the URL of the Excel file to PowerApp, use the react to PowerApp step.
  • After receiving the “Excel link” by PowerApp, it uses the download function to save the file. 

Hence, the process of importing to excel ends here.

58. What do you mean by a concurrent function in PowerApps?

Ans. Different types of formulas are estimated at the time using the Concurrent function. Concurrent means together. These different formulas are generally evaluated by tying them together with the operator that estimates each one in turn. As a result, users don’t need to spend much time for the same result when the app executes actions together.

59. What do you mean by Environment variable and How do you make one in PowerApps?

Ans. For each environment in MS PowerApps, environment variables are produced and they store the parameter keys and values. Moreover, these variables are also useful as input to different application objects.

This method helps you to isolate the variables from the absorbing objects and change the values within the same environment. You can also change the values while migrating solutions to other environments.

60. Distinguish between an action and a trigger in MS-Flow?

Ans

Action: The actions are the changes directed by a User. For example, a user can use an action to do SQL DB activities like update,  lookup, and delete data. All actions are directly mapped to Swagger activities.

Trigger: Many different connectors have triggers that are useful to inform the user’s app when specific events happen. Here, a user can use the FTP connector with the “OnUpdatedFile” trigger for an example. Now users can build a “Logic App” or a “flow” that listens for the trigger and takes action.

The trigger is classified into two different categories: Push Trigger & polling Trigger.

Polling Trigger: The polling triggers can verify new data by calling the user service at a specific interval.

Push Trigger: The push triggers help to listen for data at the endpoint which implies they will wait till something happens. 

61. Explain the difference between the following Power Apps functions- Match, IsMatch, and MatchAll?

Ans. The “IsMatch” function in the PowerApps returns “True or False” results depending on whether a string matches with a figure, which is generally done through a regular expression. Here, the first record that matches with the figure or pattern is returned by the “Match” function. For each located match, the function “MatchAll” returns a table.

62. How can you use the canvas components in your apps?

Ans. Components are reusable ingredients for canvas apps that allow an app developer to build custom controls and reuse them for different apps. We can export and import these components between apps in different companies. Moreover, the components are very useful as they allow users to develop larger programs with similar control designs.

We will understand this with an example: Here, we can develop a navigation control system that can be utilized across different screens within the program. Whenever we update a component, we can see the reflected changes in all instances of the app.

63. Explain with an example how to use the LookUp() & Filter() functions. What differentiates LookUp function from Filter()?

Ans. The LookUp() function can be used to find a single record that meets one or more requirements. LookUp() function finds the first record within a database that meets a formula's needs. 

The function Filter(), recovers all records or items from a database that meets the standards set.

Here is the syntax used for LookUp() function:- LookUp(Table*, Formula [, ReductionFormula])

  • LookUp() function Example: 
  • LookUp(Soap, Color = “White”, Quantity)

The syntax used for Filter() function is- Filter(Table*, Formula A [, Formula B, … ] ).

Filter() function Example: 

  • Filter(Soap, “white” in Lower(Color ));

64. In Microsoft Power Apps, how can we apply Error Handling?

Ans. If there is an error while sending the feedback, the app will present a suitable message. This message will help the salesperson in determining what error occurred and how to proceed further. Moreover, the Canvas App introduces two different functions called “IfError” and “isError”. These functions help to manage errors and display a suitable message.

To use the above functions, you must enable Formula-level error management. Below are the useful steps to enable the Formula level:

First, you need to open the Canvas App and select “File”.

Click > Settings < then go to > Advanced Settings option.

Now you can “Enable” Formula-level error management.

65. What is meant by delegation?

Ans. The key to building more efficient apps is to keep the size of data on your device to a limit. Perhaps you simply need many 100 records out of a million, or perhaps a single total value might define thousands of entries. When the ignorance of Power Apps formulas meets the need to minimize data efforts across the network, delegation is the outcome then. In other terms, rather than getting data to the app for reusing locally, PowerApps will delegate data processing to the data source.

The following stage is to limit the formula’s usage to those that can be delegated. The formula essentials that can be delegated are listed now. Though each data source is unique, not all of these essentials are supported by all of them. In your particular formula, please see for delegation alerts.

66. Define SaveData, LoadData, and ClearData functions in MS PowerApps?

Ans. Let us know in detail how these functions work.

The “SaveData” function is useful to save collections under a name for later use.

The “LoadData” function reloads a collection saved earlier with the “SaveData” function. Further, this function is not useful to load a collection from other sources.

The function “ClearData” clears all the data related to a given name or all data storage related to the app in case there no name is provided.

The following are the syntax for LoadData, SaveData, and ClearData functions:

  • SaveData ( Collection, Name )
  • LoadData ( Collection, Name [, IgnoreNonexistentFile ])

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Amani
Amani
Research Analyst
As a content writer at HKR trainings, I deliver content on various technologies. I hold my graduation degree in Information technology. I am passionate about helping people understand technology-related content through my easily digestible content. My writings include Data Science, Machine Learning, Artificial Intelligence, Python, Salesforce, Servicenow and etc.