070-518 무료 덤프문제 온라인 액세스

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:
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Reduce delays when saving datA.
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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 optimistic concurrency as the user completes each wizard page.
• C.Insert captured data by using non-transactional operations when the user completes the wizard.
• D.Insert all captured data in a single transaction when the user completes the wizard.

You are designing a new feature for an existing Windows Forms application by using Microsoft .NET Framework 4.
The application contains multiple forms that are loaded into a parent Multiple Document Interface (MDI) form. Your company policy does not allow the use of third-party controls.
You need to ensure that the new feature meets the following requirements: - It provides a three-dimensional scale model.
- It allows users to change the colors of the model and communicates the color
selections back to the application. - It allows the model to scale, based on the user's client computer display resolution. - It is a child form in the MDI application.
What should you do?

• A.Design the new feature in the existing Windows Forms application as a Windows form.
  Add the form as a child form to the MDI window.
• B.Design the new feature in a new Windows Presentation Foundation (WPF) application.
  Host the existing application inside the new WPF application by using the WindowsFormsHost class
• C.Design the new feature by using a Windows Presentation Foundation (WPF) user control.
  Use the ElementHost class to host the WPF user control in the existing Windows Forms application.
• D.Design the new feature in a new application by using Windows Presentation Foundation (WPF).
  Invoke the new WPF application from the existing Windows Forms application.

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.

• 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.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.
• D.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.

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 Data ErrorValidat ion Rule 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 Exception ValidationRule elements.
• D.Set the ValidationStep attribute on ValidationRule elements to RawProposedValue.

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