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

1. You are designing an n-tier solution that includes a Windows Presentation Foundation (WPF) client application. The WPF application connects to a middle-tier server that runs the data access layer.
The data access layer connects to a Microsoft SQL Server 2008 database and to a mainframe-based database.
The mainframe-based database will be replaced in one year.
You have the following requirements:
---
Centrally manage all database connections.
Minimize changes to the code base when the database is replaced.
Ensure that the WPF application will not need to be redeployed when the database
is replaced.
You need to recommend an approach for designing the data access layer.
What should you recommend?

A) Add the connection string information for the databases to the configuration file for the WPF application. Implement one class in the WPF application for each data source.
B) Create a data access layer class that uses a database factory class to access all databases. Add the connection string information for the databases to the configuration file for the WPF application.
C) Add the connection string information for the databases to the configuration file for the WPF application. Implement a database factory class from within the WPF application.
D) Create a data access layer class that uses a database factory class to access all databases. Add the connection string information for the databases to the configuration file for the data access layer class.

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 and 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 in a SqlException object. Retrieve 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 an n-tier solution that connects to a Microsoft SQL Server 2008 database.
You plan to deploy the database to development machines and to a staging database server from within Microsoft Visual Studio 2010.
You plan to set up separate build configurations for development and staging. You also plan to deploy to multiple production database servers managed by an outside vendor.
You must not allow the outside vendor to access the Visual Studio projects.
You need to recommend an approach for configuring and deploying the production database servers.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) Use SQL Server 2008 Management Studio to deploy the production databases.
B) Use VSDBCMD to deploy the production databases.
C) Use a SQL Server 2008 Database Project.
D) Use a Visual C# SQL CLR Database Project.

4. ---
You are designing a .NET Framework 4 solution. The solution contains a Windows Presentation Foundation (WPF) application and a Windows Communication Foundation (WCF) Web service.
The WPF application uses the WCF Web service to store data in a Microsoft SQL Server 2008 database.
You have the following requirements:
Ensure that the WPF application functions while users' computers are offline.
Minimize the time spent sending data to the WCF Web service.
Minimize disk space requirements for data storage.
You need to recommend an approach for synchronizing data between the WPF application and the database.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) Create a local caching solution that periodically checks for Internet connectivity, uses local memory, and batches changes to the WCF Web service.
B) Create a local caching solution that periodically checks for Internet connectivity and writes directly to the local data store and to the WCF Web service.
C) Store data in DataSet objects. Serialize data locally by using XML serialization.
D) Store data in custom business objects. Serialize data locally by using custom serialization.

5. You are designing an application by using Windows Presentation Foundation (WPF) and
Microsoft .NET Framework 4.
The user interface (UI) tier of the application will be implemented in WPF.
The middle tier of the application is implemented by using an existing COM component.
The middle tier contains a long-running method named ProcessDatA.
You need to ensure that users can continue to use the UI while ProcessData is running.
What should you do?

A) Call the DoEvents method of the Application class before invoking ProcessDatA.
B) Use the Invoke method of the Dispatcher class to call ProcessDatA.
C) Call the Run method of the Dispatcher class before invoking ProcessDat
D) Use an asynchronous worker thread to call ProcessDatA.

Solutions: