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

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

2. You are building a client for a Windows Communication Foundation (WCF) service.
You need to create a proxy to consume this service.
Which class should you use?

A) CommunicationObject
B) ClientRuntime
C) ChannelFactory<TChannel>
D) ServiceHost

3. You are developing an ASP.NET application by using Visual Studio 2010. You need to interactively debug the entire application. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Select the ASP.NET debugger option in the project properties.
B) Add a DebuggerDisplay attribute to the code-behind file of the page that you want to debug.
C) Set the Debug attribute of the compilation node of the web.config file to true.
D) Define the DEBUG constant in the project settings.

4. 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) + "}";

5. You are implementing an ASP.NET page in an e-commerce application. Code in a btnAddToCart_Click
event handler adds a product to the shopping cart.
The page should check the status of the shopping cart and always show a cart icon when one or more
items are in the shopping cart. The page should hide the icon when the shopping cart has no items. You
need to add an event handler to implement this requirement.
Which event handler should you add?

A) btnAddToCart_Click
B) Page_Load
C) Page_PreInit
D) Page_PreRender

Solutions: