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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 by using
Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The application will consist of a user interface (UI) tier and a middle tier. The middle tier will
be implemented by using Windows Communication Foundation (WCF).
You plan to design the exception handling strategy for the application. Each method in the middle tier will contain the following catch block. Catch e AsArgumentNullException.
Throw e
When testing the application, you discover that all ArgumentNullExceptions that occur in
the middle tier do not contain accurate stack trace information.
What should you do?

A) Create an ArgumentNullException handler in the UI tier.
B) Use a DispatcherUnhandledExceptionEvent handler in the UI tier.
C) Use a DispatcherUnhandledExceptionEvent handler in the middle tier.
D) Remove the exception parameter from the ArgumentNullException handler.

2. You are designing a Windows Forms application. The application connects to a Microsoft SQL Server 2008 database.
You need to recommend an approach for retrieving and logging all informational messages and error messages reported by the database.
What should you recommend?

A) Retrieve informational messages in a SqlException object. Retrieve error messages by creating a handler for the InfoMessage event.
B) Retrieve informational messages and error messages in a SqlException object.
C) Retrieve informational messages and error messages by creating a handler for the InfoMessage event.
D) Retrieve informational messages by creating a handler for the InfoMessage event. Retrieve error messages in a SqlException object.

3. ---
You are designing a distributed application that will be deployed to 5,000 users worldwide. Servers on five continents will host the Web services and the Microsoft SQL Server 2008 databases that support the application.
You have the following requirements:
Collect information about all errors associated with the application.
Store and view all error information in a centralized location.
Minimize the network bandwidth required for the transfer of error information.
You need to recommend a strategy for reporting error information.
Which strategy should you recommend?

A) Write error messages to the SQL Server databases. Synchronize the databases by using transactional replication.
B) Write error messages to the event logs on the local computers. Use Windows Management Instrumentation (WMI) to view the error information.
C) Write error messages to the event logs on the local computers. Use Windows Error Reporting to view the error information.
D) Write error messages to the SQL Server databases. Synchronize the databases by using merge replication.

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

5. You are designing a Windows Presentation Foundation (WPF) application for your company by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The business layer of the application is implemented by using Windows Communication Foundation (WCF).
You plan to support non-repudiation and data integrity for WCF messages.
You need to design the security strategy for the application.
What should you do?

A) Encrypt the WCF messages by using the Secure Sockets Layer (SSL) protocol.
B) Implement message-level security by using digital certificates as client computer credentials.
C) Encrypt the WCF messages by using the Internet Protocol Security (IPSec) protocol.
D) Attach a digital signature to the WCF messages.

Solutions: