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

1. 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.

2. You are designing an application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The application is used mostly in a disconnected scenario. The application requires offline data from a Microsoft SQL Server 2008 database. When the application connects to the network, data will be modified and synchronized.
You need to ensure that the application does not access the database server directly to synchronize data when online.
Which technology should you use?

A) ADO.NET Sync Services
B) Remote Data Access
C) SQL Server Merge Replication
D) WCF Data Service

3. You are designing a .NET Framework 4 solution that contains a Windows Presentation Foundation (WPF) application and a Windows Communication Framework (WCF) Web service. The WPF application will be deployed to users' desktops located in the company's corporate network. The WCF Web service will be deployed to a Web farm located in the company's perimeter network. The firewall between the perimeter network and the Internet allows only HTTP and HTTPStraffic.
You need to recommend an approach for minimizing the attack surface of the WCF Web service.
What should you recommend?

A) Add a load-balancing router to the Web farm configuration.
B) Configure a WCF endpoint to use the basicHttpBinding binding.
C) Set up an SSL certificate on the server.
D) Configure a WCF endpoint to use the NetTcpBinding binding.

4. You are designing a complex and critical Windows desktop application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
You plan to implement a logging strategy for the application.
You need to record all unexpected errors that occur in the application.
What should you do?

A) Create a global WIN 32 unhandled exception filter.
Record relevant application-specific information to an external log from within the filter.
B) Subscribe to the unhandled exception event handler for the AppDomain object.
Record relevant application-specific information to an external log.
C) Subscribe to the unhandled exception event handler for the application's dispatcher on the main application thread.
Record relevant application-specific information to an external log.
D) Create a generic catch (Exception e) block in the Main method of the application.
Record relevant application-specific information to a log in the Main method.

5. You are designing a Windows application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The business logic layer of the application is implemented by using Windows Communication Foundation (WCF).
You create a duplex bidirectional WCF service that contains a single operation. The service operation sends the result back to the client application by using a two-way callback operation.
You plan to design a service interaction strategy.
You need to ensure that deadlocks are prevented.
What should you do?

A) Configure the ServiceBehaviorAttribute attribute to use the Synchronization context in the service class.
B) Configure the ServiceBehaviorAttribute attribute to use the Reentrant or Multiple concurrency mode in the service class.
C) Configure the CallbackBehaviorAttribute attribute to use the Synchronization context in the callback class.
D) Configure the CallbackBehaviorAttribute attribute to use the Reentrant or Multiple concurrency mode in the callback class.

Solutions:

Question # 1 Answer: C,D

Question # 2 Answer: A

Question # 3 Answer: D

Question # 4 Answer: B

Question # 5 Answer: B