The company provides a car renting service. It has several Power Platform applications. 
The company’s goal is to improve customer self-service. They want to introduce self-service car rent when a customer takes a picture of the car’s plate using a mobile app and camera phone. The app reads the plate number and asks a customer to input the return date. After the checkout is done and a customer drives a car from the lot. Also, the company wants to provide web self-services for the customers, like center directions and Q&A. And finally, the company needs to add several new views and reports for the management based on the Dataverse data. You are a Solution Architect. 
Please select two options for the Power Apps composition that would address the company’s requirements.

Answer options:

A.A canvas app with embedded model-driven component and Power Apps portal
B.A model-driven app with embedded canvas app component and Power Apps portal
C.Power Apps portal with embedded model-driven and canvas components
D.A model-driven and canvas apps
E.A canvas app, model-driven app, and Power Apps portal
F.A model-driven app and Power Apps portal

Correct Answers: B and E 
As a Solution Architect, you need to know what Power Apps type is best suited for the customers’ requirements. 
There are three types of Power Apps applications: Model-driven — responsive Dataverse data-driven applications. This type is more data administration with a back-office and process focus.
Canvas — flexible phone or tablet applications that can use multiple data sources. The canvas app is focused on the end-user and helps to execute a particular task.
Portal — external websites for interaction with Dataverse data. It has the end-user focus.
Your architectural solution should not be monolithic. But it should not contain a lot of small apps either. You need to find the best composition for your solution between three main Power Apps types, Dynamics 365 functionality, components, and other AppStore apps. Option B is correct because you have to use a canvas app with an AI builder Text recognition model for taking a plate picture and extracting text from the plate’s image. Then you embed the canvas app into a model-driven app because the model-driven app only works with the Business card reader model.You also need the Power Apps portal for the web services and a model-driven app for the new management reports.
Option E is correct because you can use the three Power Apps apps independently without embedding the canvas component into the model-drive app.
Option A is incorrect because you cannot embed a model-driven app into a canvas app.
Option C is incorrect because you cannot embed model-driven and canvas apps into a Power Apps portal app.
Option D is incorrect because you need to implement a Power Apps portal app for the end-users’ self-services.
Option F is incorrect because you need to use a canvas app for the car’s plate picture requirement.
For more information about the Power Apps composition, please visit the below URLs: 

https://docs.microsoft.com/en-us/learn/modules/power-apps-architecture/3-composition
https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/add-reporting-to-app
https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/embedded-canvas-app-add-classic-designer