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

1. You are designing a Windows Presentation Foundation (WPF) application. The WPF application contains code that will be executed by both full trust callers and partial trust callers.
The WPF application code does not have the AllowPartialTrustCallers attribute set.
You have the following requirements:
- The application security settings must allow partial trust callers to create and write
to a file.
- Users must have access only to files that they create and not to files created by other users.
You need to recommend a location for storing each user's files.
Which location should you recommend?

A) The user's IsolatedStorage folder
B) The user's Roaming folder
C) The user's My Documents folder
D) The user's LocalSettings folder

2. You are evaluating an existing Windows Presentation Foundation (WPF) application. The WPF application runs in a Web browser as a XAML browser application (XBAP). The WPF application runs in the Intranet zone with Full Trust. A client certificate for the WPF application has been generated.
Users are unable to access the WPF application. You locate the following message in the security log: "User has refused to grant required permissions to the application." Users state that they are clicking OK in all message boxes that appear.
You need to recommend an approach for ensuring that the WPF application runs correctly on all client computers.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) Import the client certificate to the Trusted Root store.
B) Modify the ClickOnce manifest for the WPF application to grant the appropriate permissions.
C) Use the Code Access Security Policy Tool to grant the appropriate permissions.
D) Sign the ClickOnce manifest for the WPF application.

3. You are developing a Windows application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The application will consume a Windows Communication Foundation (WCF) service. The WCF service will provide data to the application.
You plan to use the ADO.NET Entity Framework to create a data model that will be used by the application.
Another development team makes changes to the WCF service data contract.
You need to ensure that changes made to the WCF service data contract do not require the application to be recompiled.
What should you do?

A) Create a conceptual model based on the business model. Use a class generated from the conceptual model for programming. Update the mapping file when the new version of the WCF service is available.
B) Create a storage model based on the business model. Use a class generated from the storage model for programming.
C) Create a storage model based on the schema of the existing WCF service. Update the mapping file when the new version of the WCF service is available.
D) Create a conceptual model and a storage model based on the existing version of the WCF service.

4. ---
You are designing a distributed Windows Presentation Foundation (WPF) application. You have the following requirements:
Ensure that all errors are logged in a central location.
Ensure that the WPF application logs related errors within a single transaction.
Secure error information during transmission.
You need to recommend a strategy for collecting error information.
What should you recommend?

A) Create a Windows Communication Foundation (WCF) service. Use the basicHttpBinding protocol to transport the information.
B) Write the information to the Windows Application log on each client system. Use Windows Management Instrumentation (WMI) to collect the results.
C) Write the information to the Windows Application log on each client system. Use Windows Error Reporting to collect the results.
D) Create a Windows Communication Foundation (WCF) service. Use the wsHttpBinding protocol to transport the information.

5. You are designing an n-tier Windows application by using Microsoft .NET Framework 4, Microsoft Visual Studio 2010, and Microsoft SQL Server 2008.
The application will replace an existing client/server application. The existing application was created by using Microsoft Visual Basic 6.0 and consists of a series of COM components that access a SQL Server database.
You plan to move the existing COM components into a Windows Communication Foundation (WCF) tier.
You need to ensure that the COM components can be replaced without impacting the existing user interface (UI) tier. You also need to ensure that the COM components can be replaced separately.
What should you do?

A) Use .NET COM Interop on the client tier to interact directly with the COM components until they are replaced by the managed code.
B) Convert the Visual Basic 6.0 source code to managed code by using the Visual Studio converters. Use these code components on the client/server application until they are replaced individually with the new permanent managed code functionality.
C) Create a common assembly on the UI tier of the new application to interface with the COM components.
D) Create a common assembly on the WCF tier of the new application to interface with the COM components.

Solutions: