Knowledge of .Net Framework 4.0 Skills Test Answers
·
1. How will you count the odd numbers
from the array shown below using LINQ in .Net framework 4.0?
int[]numbers={5,4,1,3,9,8,6,7,2,0};
Answers:
• int findoddNumbers =
numbers.Count(n => n % 2 == 1);
• int findoddNumbers
= numbers.Count( n % 2 == 1);
• int
findoddNumbers = (from number in numbers where numbers%2==1 select Count());
• int findoddNumbers = (from
number in numbers where number%2==1 select numbers).Count();
2. Consider the following code snippet:
namespace ExtensionMethods
{
public static class
NumericExtensionMethods
{
public static bool
IsNumeric(this string s)
{
float output;
return
float.TryParse(s, out output);
}
}
}
After adding the namespace, how will
you call the ExtensionMethod on the string if your string variable is defined
as:
string test="4";
Answers:
• test.IsNumeric();
•
ExtensionMethods.NumericExtensionMethods.IsNumeric();
•
NumericExtensionMethods m = new NumericExtensionMethods(); m.IsNumeric(test);
• None of the
above
3. What is the purpose of the
System.Windows.Data namespace in .Net framework 4.0?
Answers:
• Using
System.Windows.Data namespace, you can integrate rich media, including drawings,
text, and audio/video content in Windows Presentation Foundation applications.
• It contains classes used
for binding properties to data sources, data source provider classes, and
data-specific implementations of collections and views.
• It provides the
types that support navigation, including navigating between windows and
navigation journaling.
• It contains
classes for creating windows-based applications that take full advantage of the
rich user interface features available in the Microsoft Windows operating
system.
4. Suppose you want to eliminate
duplicate elements from the array
int[] source = { 7, 4, 1, 3, 9, 8, 6,
7, 2, 1, 8, 15, 8, 23}
and sort the elements in descending
order using LINQ in .Net framework 4.0. Which of the following statements can
you use?
Answers:
• var result =
(from s in source orderby s select distinct s).Descending();
• var result = (from s in
source orderby s descending select s).Distinct();
• var result =
select distinct s from s in source sortby s descending;
• var result =
from s in source orderby s descending group p by s select s;
5. Which of the following classes of
System.Windows.Media namespace provides rendering support in WPF which includes
hit testing, coordinate transformation, and bounding box calculations in .Net
framework 4.0?
Answers:
• HitTestResult
• Visual
• Colors
• Brush
6. Which of the following statements
is correct for ASP.NET MVC Routing in .Net Framework 4.0?
Answers:
• It is used to match the
incoming requests and to map them to a controller action.
• It is used to
construct the outgoing URLs which correspond to controller actions.
• Both a and b
are correct.
7. Which of the following is NOT a
valid data source control in .Net framework 4.0?
Answers:
• LinqDataSource
• XmlDataSource
•
AccessDataSource
•
EntityDataSource
• All of the above are valid
data sources
8. Which of the following statements
is correct for WSHttpBinding of WCF in .Net framework 4.0?
Answers:
• It is a secure and
interoperable binding that is suitable for non-duplex service contracts.
• It is a secure
and interoperable binding that is suitable for duplex service contracts or
communication through SOAP intermediaries.
• It is a secure
and optimized binding suitable for cross-machine communication between WCF
applications.
• It is a queued
binding that is suitable for cross-machine communication between WCF
applications.
9. What result will you get when you
run the following LINQ query in .Net framework 4.0?
var scoreRecords = new[] { new {Name =
"Alice", Score = 50},
new {Name =
"Bob" , Score = 40},
new {Name =
"Cathy", Score = 45}
};
var scoreRecordsDict =
scoreRecords.ToDictionary(sr =>sr.Name);
Response.Write(scoreRecordsDict["Bob"]);
Answers:
• { Name = Bob}
• { Name = Bob, Score = 40 }
• Name = Bob
• None of the
above
10. Which of the following is the
correct way to expand the size of application URLs in .Net framework 4.0?
Answers:
• <httpModules
maxRequestPathLength="260" maxQueryStringLength="2048"
/>
• <httpRuntime
maxRequestPathLength="260" maxQueryStringLength="2048"
/>
•
<httpHandlers maxRequestPathLength="260"
maxQueryStringLength="2048" />
• None of the above
11. How will you implement the logic
for the following scenario in .Net framework 4.0?
Suppose you have a GridView with
paging enabled. You select the third row on page 1 and then move to page 2.
Nothing is selected on page 2. When you move back to page 1, the third row
should still be selected.
Answers:
• Set the
GridView DataKeyNames property.
• Set the GridView
EnablePersistedSelection property to true.
• Set the
Gridview PagerSettings-Mode property.
• It is not
possible to implement the given logic for the scenario described above.
12. How do you add MetaDescription to
your web page in .Net framework 4.0?
Answers:
• HtmlMeta meta2
= new HtmlMeta(); meta2.Name = "description"; meta2.Content =
"add meta description"; Page.Header.Controls.Add(HtmlMeta );
• Page.MetaDescription
• Both a and b
are correct.
• None of the
above.
13. Which of the following statements
is correct for the bubbling routing strategies used by the routing events in
WPF in .Net framework 4.0?
Answers:
• This event is
first raised on the root, then on each element down the tree until the source
element is reached.
• This event is
only raised on the source element. It will have the same behavior as a plain
.NET event, except that such events can still participate in mechanisms
specific to routed events such as event triggers.
• This event is first raised
on the source element, then on each element up the tree until the root is
reached.
• None of the
above.
14. How many columns can you select by
$orderby OData system query option in .Net Framework 4.0?
Answers:
• 5
• 12
• 20
• infinite
15. Which of the following OData
system query options is used to determine the maximum number of records to be
returned in .Net framework 4.0?
Answers:
• $top
• $filter
• $select
• $expand
16. How can you determine, at runtime,
if your application is running in the 64-bit version of .Net framework 4.0?
Answers:
• Check IntPtr.Size property
for a value of 8.
• Call the
Environment.GetEnvironmentVariable method and pass in the string "Platform"
as an argument. Check for a return value of "x64".
• Call the WOW64
emulator method Isx64() and check the boolean return value.
17. Suppose your WCF service root URL
is "http://examples.svc". What will be the response when you request
a WCF data service URL with a $skip system query option, as shown below, in
.Net framework 4.0?
http://examples.svc/Products?$skip=2&$top=2&$orderby=Rating
Answers:
• The response
will be the first two product entries from the collection of all products after
sorting the collection in descending order of Rating.
• The response will be the
third and fourth product entries from the collection of all products after
sorting the collection in ascending order of Rating.
• The response
will be the second and third product entries from the collection of all
products after sorting the collection in descending order of Rating.
18. Which of the following arrays will
be returned as result when you run the following LINQ query in .Net framework
4.0?
object[] varnumbers = { null, 1.0,
"two", 3, "four", 5, "six", 7.0 };
var doubles =
varnumbers.OfType<double>();
foreach (var d in doubles)
{
Response.Write(d);
}
Answers:
• 1, 7
• null
• two, four, six
• null, 1.0,
"two", 3, "four", 5, "six", 7.0
19. Which of the following ASP.NET MVC
namespaces includes the classes that support forms, input controls, links,
partial views, and validation in .Net Framework 4.0?
Answers:
• System.Web.Mvc
•
System.Web.Mvc.Async
• System.Web.Mvc.Html
• System.Web.Mvc.Sync
20. What is DLR in .Net framework 4.0?
Answers:
• It defines the
common types that are supported by the languages which are compatible with the
.Net framework.
• It represents
the data types of different languages in a specific format specification.
• It is a
programming language that manages the execution of programs written in any of
several supported languages, allowing them to share common object-oriented
classes written in any of the languages.
• It is a runtime
environment that adds a set of services for dynamic languages to the common
language runtime.
21. What is default format used to
represent data returned in an ADO.NET Data Services response in .Net framework
4.0?
Answers:
• XAML
• SOAP
• Atom
• WSDL
22. Considering the image, which of
the following is the correct syntax for encoding a particular string in .Net
framework 4.0?
Answers:
• Only a
• Only b
• Both a and b
23. In WCF, what is the significance
of the ReceiveRetryCount property of a Poison message in .Net framework 4.0?
Answers:
• It is an integer value
that indicates the maximum number of times to retry delivery of a message from
the application queue to the application.
• It is an
integer value that indicates the maximum number of retry cycles.
• It is the time
delay between retry cycles.
24. Which of the following is NOT a
valid WPF Localizability attribute in .Net framework 4.0?
Answers:
• Readability
• Modifiability
• Category
• Both a and b
• All of the above are
Localizability attributes
25. Which of the following is NOT a
valid QueryExtender filter option in .Net framework 4.0?
Answers:
•
SearchExpression
• RangeExpression
•
OrderByExpression
• All of the above are valid
QueryExtender filter options
26. What is the function of WCF Data
contracts in .Net framework 4.0?
Answers:
• They define, for each
parameter or return type, what data is serialized to be exchanged.
• They define
which operations the client can perform on the service.
• They define
which errors are raised by the service, and how the service handles and
propagates errors to its clients.
27. Which of the following pieces of
information is provided by the WCF service contract in .Net framework 4.0?
Answers:
• The grouping of
operations in a service.
• The location of the
operations.
• The specific protocols
and serialization formats that are used to support successful communication
with the service.
• All of the
above.
28. Suppose your site has a page
called Index.aspx that you no longer use. Search engines may keep requesting
this page.
Which of the following method will you
add to the CodeBehind file of Index.aspx that will send requests (including
search engine requests) to Default.aspx in .Net framework 4.0?
Answers:
• Server.Transfer
•
Response.Redirect
• Response.RedirectPermanent
• Server.Execute
29. How will you display the view data
in the view of an ASP.NET MVC Application?
Answers:
• <%:
ViewData["CurrentTime"] %>
•
<%=ViewData["CurrentTime"] %>
•
%ViewData["CurrentTime"] %
•
<ViewData["CurrentTime"] >
30. How is data passed from controllers
to views in an ASP.NET MVC Application?
Answers:
• Using ViewData
• Using ViewState
• Using Sessions
• Using Cookies
31. What result will you get when you
run the following LINQ query in .Net framework 4.0?
List<string> alphabets = new
List<string>() { "whats", "new", "in",
"aspnet" };
var alphabetsquery = from
alphabet in alphabets select alphabet.Substring(0, 1);
foreach (var alpha in
alphabetsquery)
{
Response.Write(alpha);
}
Answers:
• wnia
• whats
•
whatsnewinaspnet
•
aspnetinnewwhats
32. What is a Decorator in WPF of .Net
framework 4.0?
Answers:
• It is used to
add functional handles to elements or provide state information about a
control.
• It is the base class for
elements that apply effects onto or around a single child element, such as
Border or Viewbox.
• It provides a
set of services that can be used to extend the functionality of a common
language runtime property.
• It is a
property with the exception that its value cannot be set outside the class that
declared the read-only property.
