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Microsoft PRO: Design & Develop Wndws Apps Using MS .NET Framework 4 Sample Questions:

1. You are designing a Windows Forms application that allows users to search a product catalog and place orders.
You have the following requirements:
--
Display a progress indicator while the application is searching the catalog. Ensure that users can cancel search operations.
You need to recommend an approach that meets the requirements.
What should you recommend?

A) Execute the search on the user interface thread. Provide a Cancel button to cancel the search.
B) Implement the search as a Windows Communication Foundation (WCF) service by usingthe AsyncPattern property of the OperationContractattribute.
C) Implement the search as a duplex service.
D) Use a BackgroundWorker component to perform the search.

2. You are designing a .NET Framework 4 solution that includes a Windows Presentation Foundation (WPF) application, a Windows service, and a private assembly shared by the WPF application and by the Windows service.
The solution stores data in a local Microsoft SQL Server Compact 3.5 database. The WPF application and Windows service will each access the database directly. The solution will be installed by using Windows Installer.
You have the following requirements:
- The installer must allow users to specify the installation folders for the WPF application and for the database. - The solution must support the deployment of updates to the WPF application without restarting the Windows service.
You need to recommend an approach for installing the solution.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) Install the Windows service to the same folder as the WPF application.
B) Install the Windows service to a different folder from the WPF application.
C) In the installer, create a registry key that stores the WPF application installation path.
D) In the installer, set an environment variable that defines the database installation path.

3. You are designing a .NET Framework 4 solution that contains a Windows Presentation Foundation (WPF) application. The WPF application includes CPU-intensive calculations. The calculations can be run on a separate process and can effectively be isolated from the rest of the WPF application.
You need to recommend a deployment strategy that maximizes the scalability of the calculations for each user.
What should you recommend?

A) Deploy the calculation logic as a separate assembly along with the WPF application to each client computer. Invoke methods in the assembly asynchronously.
B) Deploy the calculation logic as a Windows Communication Foundation (WCF) service to servers. Deploy the WPF application to each client computer.
C) Deploy the calculation logic as a separate assembly along with the WPF application to each client computer. Invoke methods in the assembly synchronously.
D) Deploy the calculation logic as a Windows Communication Foundation (WCF) service to servers. Deploy the WPF application to the same servers.

4. An existing Windows application uses a Windows Communication Foundation (WCF) Web service that is available only to employees.
You have the following requirements:
---
Make the WCF Web service available to business partners.
Enable business partners to send a profile token.
Ensure that the currently deployed application continues to function.
You need to recommend a solution that meets the requirements.
What should you recommend?

A) Implement the WCF Web service as a REST service.
B) Use SOAP headers to pass the profile token to the service operations.
C) Modify the WCF Web service operations to accept the profile token as an additional parameter.
D) Convert the WCF Web service to a Duplex service that implements a callback to accept the profile token.

5. You are modifying an existing Windows Presentation Foundation (WPF) application that uses .NET Framework 4. The WPF application uses a wizard to capture data and insert the data into a database. The database includes one parent table and many child tables.
Inserting captured data in the database locks many database tables and delays application access.
You have the following requirements:
-
Reduce delays when saving datA.
--
Ensure that other application users are not blocked from reading datA. Ensure that captured data is available only after all child tables are updated.
You need to recommend an approach for inserting captured data into the database.
What should you recommend?

A) Insert captured data by using optimistic concurrency as the user completes each wizard page.
B) Insert all captured data in a single transaction when the user completes the wizard.
C) Insert captured data by using a single transaction as the user completes each wizard page.
D) Insert captured data by using non-transactional operations when the user completes the wizard.

Solutions: