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

1. A Windows Communication Foundation (WCF) service has a callback contract.
You are developing a client application that will call this service.
You must ensure that the client application can interact with the WCF service.
What should you do?

A) On the client, create a proxy derived from DuplexClientBase<TChannel>.
B) On the OperationContractAttribute, set the ReplyAction property value to the endpoint address of the client.
C) On the OperationContractAttribute, set the AsyncPattern property value to True.
D) On the client, use GetCallbackChannel<T>.

2. You are designing an ASP.NET Web Forms application.
You have the following requirements:
*Make use of exclusive features in a newly released Web browser.
*Do not change existing code files.
You need to design the application to meet the requirements.
Which approach should you recommend?

A) Use a .browser file.
B) Parse the UserAgent string in Page_Load.
C) Use the Web application's master page.
D) Use the HttpWorkerRequest class.

3. You are troubleshooting an ASP.NET Web application. System administrators have recently expanded your
web farm from one to two servers. Users are periodically reporting an error message about invalid view
state.
You need to fix the problem.
What should you do?

A) Set the machineKey in machine.config to the same value on both servers.
B) Change the session state mode to SQL Server on both servers and ensure both servers use the same connection string.
C) Override the SavePageStateToPersistenceMedium and LoadPageStateFromPersistenceMedium methods in the page base class to serialize the view state to a local web server file.
D) Set viewStateEncryptionMode to Auto in web.config on both servers.

4. 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 update function without requiring changes in the code. What should you do?

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

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to a Microsoft SQL Server database. The application uses a DataTable named
OrderDetailTable that has the following columns: "ID "OrderID "ProductID "Quantity "LineTotal Some
records contain a null value in the LineTotal field and 0 in the Quantity field. You write the following code
segment. (Line numbers are included for reference only.)
01DataColumn column = new DataColumn("UnitPrice", typeof(double));
02
03OrderDetailTable.Columns.Add(column);
You need to add a calculated DataColumn named UnitPrice to the OrderDetailTable object. You also need
to ensure that UnitPrice is set to 0 when it cannot be calculated. Which code segment should you insert at
line 02?

A) column.Expression = "if(Quantity > 0, LineTotal/Quantity, 0)";
B) column.Expression = "LineTotal/Quantity";
C) column.Expression = "iif(Quantity > 0, LineTotal/Quantity, 0)";
D) column.Expression = "LineTotal/ISNULL(Quantity, 1)";

Solutions: