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You are designing updates to a Windows solution that processes complex scientific datA.The solution extracts analyzed data from Microsoft Excel by using an application-level add-in.
You have the following requirements:
Deploy the Excel add-in to client machines with the application.
Ensure that the solution supports Excel 2007 and Excel 2010.
Minimize the size of the deployment package.
You need to recommend an approach that meets the requirements.
What should you recommend?

• A. Include the primary interop assembly for Excel 2010.
• B. Include the primary interop assembly for Excel 2007.
• C. Embed the type information from the Excel 2010 COM library.
• D. Embed the Excel 2010 COM library.

You are designing an n-tier Windows solution that includes a data entry application. The solution uses Microsoft .NET Framework 4 and Microsoft SQL Server 2008.
The data entry application sends customer orders to a middle-tier server. The middle-tier server sends orders to a set of services that perform operations on the orders. Business rules determine which services to call and whether to run them in sequence or in parallel. The business rules are complex and data dependent.
The Windows solution must meet the following requirements:
- Optimize application performance by using dynamic load balancing. - Allow for business rules to be changed at runtime.
You need to recommend an approach that meets the requirements.
What should you recommend?

• A. A routed service that uses Windows Communication Foundation (WCF) messaging
• B. SQL Server stored procedures
• C. Private message queues with a controller class on the middle-tier server
• D. A Windows Communication Foundation (WCF) service for each operation, with a controller class on the middle-tier server

You are designing an n-tier Windows application by using Microsoft .NET Framework 4, Microsoft Visual Studio 2010, and Microsoft SQL Server 2008.
The application will replace an existing client/server application. The existing application was created by using Microsoft Visual Basic 6.0 and consists of a series of COM components that access a SQL Server database.
You plan to move the existing COM components into a Windows Communication Foundation (WCF) tier.
You need to ensure that the COM components can be replaced without impacting the existing user interface (UI) tier. You also need to ensure that the COM components can be replaced separately.
What should you do?

• A. Convert the Visual Basic 6.0 source code to managed code by using the Visual Studio converters. Use these code components on the client/server application until they are replaced individually with the new permanent managed code functionality.
• B. Use .NET COM Interop on the client tier to interact directly with the COM components until they are replaced by the managed code.
• C. Create a common assembly on the WCF tier of the new application to interface with the COM components.
• D. Create a common assembly on the UI tier of the new application to interface with the COM components.

You are designing an application by using Windows Presentation Foundation (WPF) and Microsoft .NET Framework 4.
The application retrieves customer data from an enterprise resource planning (ERP) system.
You need to ensure that the following requirements are met: - Customer data is retrieved only once.
- Customer data is available on multiple forms within the application.
- Forms can implement Two-Way binding to the customer datA.
What should you do?

• A. Design a static class for the data that implements the IObservable interface. Subscribe to the static class from each of the forms that use the datA.
• B. Store the results of the query in a static DataTable object that is used by all the forms.
• C. Design a static class for the data that implements the INotifyPropertyChanged interface. Raise the PropertyChanged event to notify the forms when data is changed.
• D. Store the results of the query in a local XML file. Bind all forms to an XMLDataAdapter object that references the local XML file.

You are designing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
During testing of the application, you identify several bottlenecks by using Windows Task Manager and Windows Performance Monitor.
You need to recommend a system test strategy that will meet the following requirements:
- Identify major application workloads.
- Identify the functions of the application that are most impacted.
Which testing strategy should you recommend?

• A. Stability testing
• B. Scalability testing
• C. Usability testing
• D. Security testing