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

1. ---
You are analyzing a Windows client application that uses Microsoft Visual Studio 2010 and Microsoft SQL Server 2008.
The application updates two database tables from the main user interface (UI) thread.
You need to ensure that the following requirements are met:
The database tables are either updated simultaneously or not updated at all.
Users are notified of the success or failure of the updates.
Users are able to perform other tasks during the update process.
What should you do?

A) Use TransactionScope in a Using block on the UI thread.
Create a DependentTransaction object within the block and pass the object to the BackgroundWorkerReportProgress method.
Use the object in the ReportProgress method to create a new TransactionScope block.
B) Use TransactionScope in a Using block on the UI thread.
Batch the database updates by setting the DbDataAdapter.UpdateBatchSize property to 2.
C) Move the database update logic to a BackgroundWorker thread.
Ensure that the thread is enclosed in a TransactionScope Using block in the BackgroundWorkerDoWork method.
D) Use TransactionScope in a Using block on the main thread.
Create a BackgroundWorker thread within the block.
Move the database updates to the BackgroundWorkerDoWork method.

2. 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 generic catch (Exception e) block in the Main method of the application.
Record relevant application-specific information to a log in the Main method.
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 global WIN 32 unhandled exception filter.
Record relevant application-specific information to an external log from within the filter.

3. You are designing a Windows Presentation Foundation (WPF) application. The WPF application displays indicators to compare your company's past performance to the current day's operationsdata.
The WPF application accesses historic data from your company's data warehouse through a Web service, and accesses current data directly from a Microsoft SQL Server 2008 database.
The WPF application must meet the following requirements:
- Retrieve historic data from the data warehouse at application startup and then once per day.
- Retrieve current data from the database every five minutes, and then update the
indicators.
- Cache all retrieveddata.
- Target the .NET Framework 4 Client Profile.
You need to recommend an approach to data caching.
What should you recommend?

A) Use System.Runtime.Caching with a sliding expiration.
B) UseSystem.Web.Caching with a sliding expiration.
C) Use System.Runtime.Caching with an absolute expiration.
D) UseSystem.Web.Caching with an absolute expiration.

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 generic catch (Exception e) block in the Main method of the application.
Record relevant application-specific information to a log in the Main method.
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 global WIN 32 unhandled exception filter.
Record relevant application-specific information to an external log from within the filter.

5. 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 storage model based on the business model. Use a class generated from the storage model for programming,
B) Create a conceptual model and a storage model based on the existing version of the WCF service.
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 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.

Solutions: