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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 that requests reports from a Windows Communication Foundation (WCF) Web service.
Users must be able to perform other tasks while the WCF Web service generates the report.
You need to recommend a message exchange pattern for the communication between the WPF application and the WCF Web service.
What are two possible message exchange patterns that will meet the requirements? (Each correct answer presents a complete solution, Choose two.)

A) Datagram with session
B) Duplex
C) Request-Response
D) Datagram without session

2. 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) 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.
B) 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.
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 WPF application.

3. You are designing a Windows Forms application.
You intend to display graphics on a form in the application by using a third-party Windows Presentation Foundation (WPF) control.
You need to recommend a control for hosting the third-party WPF control.
What should you recommend?

A) A Panel control
B) A windowsFormsHost control
C) AnElementHost control
D) A Canvas control

4. You are designing a Windows Presentation Foundation (WPF) data entry application. The application uses data binding to bind controls in the user interface (UI) to business objects. The UI uses validation rules for each input control.
The data validation rules change based on the state of the business object.
You need to recommend a validation strategy that will allow changes to the validation rules without changes to the UI code.
What should you recommend?

A) Implement the IDataErrorInfo interface in the business objects and replace all ValidationRule elements with Exception ValidationRule elements.
B) Set the ValidationStep attribute on ValidationRule elements to CommittedValue.
C) Implement the IDataErrorInfo interface in the business objects and replace all
ValidationRule elements with Data ErrorValidat ion Rule elements.
D) Set the ValidationStep attribute on ValidationRule elements to RawProposedValue.

5. You are designing a Windows Presentation Foundation (WPF) application that uses .NET
Framework 4.
The WPF application will be deployed to 5,000 users worldwide.
You need to recommend an approach for identifying problems that users will experience.
Which testing methodology should you recommend?

A) Functional testing
B) Acceptance testing
C) Usability testing
D) Integration testing

Solutions: