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Microsoft TS: Web Applications Development with Microsoft .NET Framework 4 Sample Questions:

1. You are implementing an ASP.NET application that includes the following requirements.
Retrieve the number of active bugs from the cache, if the number is present.
If the number is not found in the cache, call a method named GetActiveBugs, and save the result under the
ActiveBugs cache key.
Ensure that cached data expires after 30 seconds.
You need to add code to fulfill the requirements.
Which code segment should you add?

A) int numOfActiveBugs = 0;
if (Cache["ActiveBugs"] == null)
{ int result = GetActiveBugs(); Cache.Add("ActiveBugs", result, null, DateTime.Now.AddSeconds(30), Cache.NoSlidingExpiration, CacheItemPriority.Normal, null); Cache.NoSlidingExpiration, CacheItemPriority.Normal, null); numOfActiveBugs = result;
}
ActiveBugs = numOfActiveBugs;
B) int? numOfActiveBugs = (int?)Cache["ActiveBugs"];
if (!numOfActiveBugs.HasValue)
{
int result = GetActiveBugs();
Cache.Insert("ActiveBugs", result, null,
DateTime.Now.AddSeconds(30), Cache.NoSlidingExpiration);
numOfActiveBugs = result;
}
ActiveBugs = numOfActiveBugs.Value;
C) int numOfActiveBugs = (int) Cache.Get("ActiveBugs");
if (numOfActiveBugs != 0)
{
int result = GetActiveBugs();
Cache.Insert("ActiveBugs", result, null,
DateTime.Now.AddSeconds(30), Cache.NoSlidingExpiration);
numOfActiveBugs = result;
}
ActiveBugs = numOfActiveBugs;
D) int numOfActiveBugs = (int?)Cache["ActiveBugs"];
if (!numOfActiveBugs.HasValue)
{
int result = GetActiveBugs();
Cache.Insert("ActiveBugs", result, null,
Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(30));
numOfActiveBugs = result;
}
ActiveBugs = numOfActiveBugs.Value;

2. You are implementing an ASP.NET Web site.
The root directory of the site contains a page named Error.aspx.
You need to display the Error.aspx page if an unhandled error occurs on any page within the site.
You also must ensure that the original URL in the browser is not changed.
What should you do?

A) Add the following code segment to the Global.asax file.
void Application_Error(object sender, EventArgs e)
{
Response.Redirect("~/Error.aspx");
}
B) Add the following configuration to the web.config file.
<system.web>
<customErrors mode="On">
<error statusCode="500" redirect="~/Error.aspx" />
</customErrors>
</system.web>
C) Add the following code segment to the Global.asax file.
void Page_Error(object sender, EventArgs e)
{
Server.Transfer("~/Error.aspx");
}
D) Add the following configuration to the web.config file.
<system.web>
<customErrors redirectMode="ResponseRewrite" mode="On"
defaultRedirect="~/Error.aspx" />
</system.web>

3. You are developing an ASP.NET MVC 2 application. You create a login user control named login.ascx. You need to display Login.ascx in a view.
What should you do?

A) Use the @Import directive
B) Use an HTML server-side include.
C) Use the HTML.Display method
D) Use the HTML.Partial method.

4. A Web service returns a list of system users in the following format.
<xml version="1.0" > <users>
<user id="first">
<name>Name of first user</name>
<email>[email protected]</email>
</user>
<user id="second">
<name>Name of second user</name>
<email>[email protected]</email>
</user>
</users>
You need to populate a drop-down menu with the IDs and names of the users from the Web service, in the
order provided by the service.
Which code segment should you use?

A) $.ajax({ type: "GET", url: serviceURL, success: function(xml) {
xml.find("user").each(function(node) { var id = $(node).attr("id"); var tx = $(node).find("name").text(); $("<option>").attr("value", id).text(tx).appendTo("#dropdown");
});
}
});
B) $.ajax({ type: "GET", url: serviceURL, success: function(xml) {
$.each($(xml), function(i, item) { $("<option>").attr("value", id).text(tx).appendTo("#dropdown"); }); } });
C) $.ajax({ type: "GET", url: serviceURL, success: function(xml) {
$(xml).find("user").each(function() { var id = $(this).attr("id"); var tx = $(this).find("name").text(); $("<option>").attr("value", id).text(tx).appendTo("#dropdown");
});
}
});
D) $.ajax({ type: "GET", url: serviceURL, success: function(xml) {
$(xml).find("user").each(function() { var id = $(this).id; var tx = $(this).name.text $("<option>").attr("value", id).text(tx).appendTo("#dropdown");
});
}
});

5. You are implementing an ASP.NET application.
The application includes a Person class with property Age.
You add a page in which you get a list of Person objects and display the objects in a GridView control.
You need to add code so that the GridView row is highlighted in red if the age of the person is less than 18.
Which GridView event should you handle?

A) RowDataBound
B) RowEditing
C) RowCommand
D) RowUpdated

Solutions: