You create an application by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
You are designing a data contract for a Windows Communication foundation (WCF) service that will be hosted by the application.
You need to ensure that the data contract meets the following requirements:
– It does not support Schema versioning.
– It allows additional contract and additional elements to be included over time.
– It allows the client applications to submit messages that contain additional elements without error.
What should you do?

You create an application by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
The application currently generates output to a comma-delimited text file. Users have requested the output be generated to an XML file, a PDF file, or an HTML file.
You need to design the application to allow output in different formats. You also need to allow addition of different output format types without recompilation of the application. Which three actions should you perform?
(Each correct answer presents part of the solution. Choose three.)

You create an application by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
The application includes the following components:
– A Windows Presentation Foundation (WPF) user interface
– A class library that implements business logic
You provide documentation to allow customers to use the class library in custom applications. This class library will throw a custom exception.
This custom exception will include a state that provides security-sensitive information.
You need to design the exception to meet the following requirements:
– The unit tests and the WPF user interface can retrieve security-sensitive information.
– Customer applications cannot retrieve security-sensitive information.
What should you do?

You are creating a business component by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
The component manages the interest rates on new loans. You need to ensure that all online applications that access the component are notified
of the changes as soon as they occur. You need to achieve this goal by using the minimum amount of network bandwidth.
What should you do?

You are designing a class library by using the .NET Framework 3.5 and Microsoft SQL Server 2008.
The class library will be used by several .NET applications. The class library will contain a utility class that executes advanced mathematical operations.
You need to design the utility class to meet the following requirements:
– It can be accessed only by other classes in the same .NET assembly.
– It can be instantiated only once.
What should you do?

You create an application by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
You create a component to handle user authorization. The component contains a class named SecurityManager that has a method named CheckRights.
The CheckRights method is called by several classes within the component. You need to prevent the CheckRights method from being called directly by
the applications that consume the component.
What should you do?

You create an application by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
The application includes a data tier component that communicates with multiple databases. Some databases are hosted on Microsoft SQL Server 2008.
Other databases are hosted on third- party database servers. The data tier component receives custom business objects from client application components.
You need to ensure that the data tier component saves property values from the business objects to the databases.
What should you do?

You create a Web Service by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
The Web service will retrieve data from text files in a network share. The network share uses the NTFS file system permissions.
You need to design a component that allows users to access only the files for which they have the necessary permission.
What should you do?

You create an application by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
The application includes a component. The component will be referenced by the .NET and COM applications.
The component contains the following code segment.
public class Employee
{
public Employee(string name)
{}
}
The .NET and COM applications must perform the following tasks:
– Create objects of the Employee type.
– Use these objects to access the employee details.
You need to ensure that the .NET and COM applications can consume the managed component.
What should you do?

You are creating a Web application for an enterprise solution by using Microsoft SQL Server 2008 and the .NET Framework 3.5.
The application environment has the following specifications:
– Several users access the same data.
– Data does not change frequently.
The database schema is as shown in the exhibit. (Click the Exhibit button.)
You need to build the business logic layer to meet the following requirements:
– Support the DataRelation class.
– Minimize redundant data.
– Maintain the design of the original schema.

What should you do?