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

1. You are designing a .NET Framework 4 solution that includes a Windows Presentation Foundation (WPF) application, a Windows service, and a private assembly shared by the WPF application and by the Windows service.
The solution stores data in a local Microsoft SQL Server Compact 3.5 database. The WPF application and Windows service will each access the database directly. The solution will be installed by using Windows Installer.
You have the following requirements:
- The installer must allow users to specify the installation folders for the WPF application and for the database. - The solution must support the deployment of updates to the WPF application without restarting the Windows service.
You need to recommend an approach for installing the solution.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) Install the Windows service to a different folder from the WPF application.
B) Install the Windows service to the same folder as the WPF application.
C) In the installer, set an environment variable that defines the database installation path.
D) In the installer, create a registry key that stores the WPF application installation path.

2. You are modifying an existing Windows Presentation Foundation (WPF) application that uses .NET Framework 4. The WPF application uses a wizard to capture data and insert the data into a database. The database includes one parent table and many child tables.
Inserting captured data in the database locks many database tables and delays application access.
You have the following requirements:
Reduce delays when saving datA.
Ensure that other application users are not blocked from reading datA.
Ensure that captured data is available only after all child tables are updated.
You need to recommend an approach for inserting captured data into the database.
---
What should you recommend?

A) Insert captured data by using a single transaction as the user completes each wizard page.
B) Insert captured data by using non-transactional operations when the user completes the wizard.
C) Insert all captured data in a single transaction when the user completes the wizard.
D) Insert captured data by using optimistic concurrency as the user completes each wizard page.

3. You design a Windows Presentation Foundation (WPF) application that connects to a Microsoft SQL Server 2008 database.
The WPF application becomes unresponsive at times. When the WPF application is running, physical memory usage is between 90 percent and 95 percent.
You need to recommend a tool that will identify the memory usage characteristics of the WPF application.
Which tool should you recommend?

A) CLR Profiler
B) SQL Profiler
C) Application Center Test (ACT)
D) Event Tracing for Windows (ETW)

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

5. An existing Windows application uses a Windows Communication Foundation (WCF) Web service that is available only to employees.
You have the following requirements:
---
Make the WCF Web service available to business partners.
Enable business partners to send a profile token.
Ensure that the currently deployed application continues to function.
You need to recommend a solution that meets the requirements.
What should you recommend?

A) Implement the WCF Web service as a REST service.
B) Modify the WCF Web service operations to accept the profile token as an additional parameter.
C) Convert the WCF Web service to a Duplex service that implements a callback to accept the profile token.
D) Use SOAP headers to pass the profile token to the service operations.

Solutions: