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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) client application from which
employees will access a Web service.
Business partners will access the Web service by using proprietary client applications.
You need to recommend a solution for ensuring the integrity of data in the system.
What should you recommend?

A) Implement data validation on the client and reject invalid datA.
B) Implement data validation at the service layer and reject invalid datA.
C) Encrypt data while storing it in the database.
D) Secure the Web service by using SSL.

2. You are designing a Windows application by using Microsoft .NET Framework 4.
Remote users have limited network connectivity. Users will not have write permissions to
the local file system.
You plan to design the error logging strategy for the application.
You need to ensure that the application can collect error information. You also need to ensure that the errors can be analyzed from a centralized location.
What should you do?

A) Use a local log file.
B) Log the errors to the Windows System event log.
C) Use the Microsoft Sync Framework.
D) Log the errors to a Web service.

3. You are upgrading a stand-alone Windows Presentation Foundation (WPF) application and an XAML browser application (XBAP) to Microsoft .NET Framework 4.
You plan to add .NET 4 types and members to both applications.
Both applications consume a common utility assembly that modifies files on a local file system. The utility assembly requires full trust.
You need to ensure that both applications can use the common utility assembly without any security-related exceptions.
What should you do?

A) Apply the AllowPartiallyTrustedCallersAttribute attribute to the utility assembly.
B) Apply the AllowPartiallyTrustedCallersAttribute attribute to the XBAP application.
C) Change the <supportedRuntime> element for the XBAP application to the .NET Framework 3.5.
D) Change the <supportedRuntime> element for the WPF application to the .NET Framework 3.5.

4. 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) WCF Data Service
C) SQL Server Merge Replication
D) Remote Data Access

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

Solutions: