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Microsoft UPG:Transition MCPD.NET Frmwrk 3.5 Web Dev to 4 Web Dev Sample Questions:

1. You are implementing an ASP.NET page. Client-side script requires data. Your application includes a class
named Person with a Name property of type string. The code-behind file of the page includes the following
code segment.
public string JsonValue;
List<Person> people = GetPeopleList();
JavaScriptSerializer json = new JavaScriptSerializer();
You need to use the JavaScriptSerializer class to serialize only the Name property of each item in the
people list.
Which code segment should you use?

A) JsonValue = json.Serialize(people.SelectMany( p => Name.AsEnumerable())); var names = from person in people select person; JsonValue = json.Serialize(names);
B) JsonValue = json.Serialize(people.Select(p => p.Name)); var names = from person in people select person; JsonValue = "{" + json.Serialize(names) + "}";

2. You are creating a Windows Communication Foundation (WCF) service that implements operations in a
RESTful manner.
You need to add a delete operation.
You implement the delete method as follows.
string void DeleteItems(string id);
You need to configure WCF to call this method when the client calls the service with the HTTP DELETE
operation. What should you do?

A) Replace the return type with RemovedActivityAction.
B) Add the WebInvoke(UriTemplate = "/Items/{id}",Method="DELETE") attribute to the operation.
C) Add the HttpDelete attribute to the operation.
D) Replace the string parameter with a RemovedActivityAction parameter.

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server 2008 database. The application uses DataContexts to query the database. You create a function that meets the following requirements: *Updates the Customer table on the database when a customer is marked as deleted. *Updates the related entries in other tables (CustomerAddress, CustomerContacts) by marking them as deleted. *Prevents consumer code from setting the Deleted column's value directly. You need to ensure that the function verifies that customers have no outstanding orders before they are marked as deleted. You also need to ensure that existing applications can use the updated function without requiring changes in the code. What should you do?

A) Modify the SELECT SQL statement provided to the DataContext object to use an INNER JOIN between the Customer and Orders tables.
B) Override the Update operation of the DataContext object.
C) Override the Delete operation of the DataContext object.
D) Add new entities to the DataContext object for the Customers and Orders tables.

4. You are designing an ASP.NET Web application that displays daily sales information. The sales
information is stored in a large Microsoft SQL Server database. The database information is updated each
night. During the day, people use the Web application to display a set of standard sales reports based on
the latest database information.
The SQL queries that are required to retrieve the database information can take from 20 to 30 seconds to
execute.
You need to design the application to ensure that pages usually load in no more than 5 seconds.
Which two approaches could you recommend? (Each correct answer presents a complete solution.
Choose two.)

A) Use AJAX to retrieve the database information.
B) Use a service that proxies the database queries and caches the results.
C) Use SQL Server replication.
D) Use a control that retrieves and displays the database information.

5. You are creating a Windows Communication Foundation (WCF) service. You do not want to expose the internal implementation at the service layer. You need to expose the following class as a service named Arithmetic with an operation named Sum. public class Calculator {
public int Add(int x, int y)
{
}
}
Which code segment should you use?

A) [ServiceContract(Name="Arithmetic")] public class Calculator {
[OperationContract(Name="Sum")]
public int Add(int x, int y)
{
...
}
}
B) [ServiceContract(Name="Arithmetic")] public class Calculator {
[OperationContract(ReplyAction="Sum")]
public int Add(int x, int y)
{
...
}
}
C) [ServiceContract(ConfigurationName="Arithmetic")] public class Calculator {
[OperationContract(Action="Sum")]
public int Add(int x, int y)
{
...
}
}
D) [ServiceContract(Namespace="Arithmetic")] public class Calculator {
[OperationContract(Action="Sum")]
public int Add(int x, int y)
{
...
}
}

Solutions: