ASP.Net 3.5 using VB Test Answers
·
1. Which of the following mechanisms
are not suitable for returning a single row from a DataTable containing a large
number of records?
Answers:
•
DataTable.Rows.Find
• DataTable.Rows.Select
• DataTable.Select
• Enumerating across
DataTable.Rows
2. Given the following code, which of the
following are syntactically correct?
<Extension()> _
Public Function
AppendTest(ByVal s As String, ByVal suffix As String)
Return s & suffix
End Function
Answers:
• Dim s As String
= "test" s = s.AppendTest(s, "suffix")
• Dim s As String =
"test" s = s.AppendTest("suffix")
• Dim s As String =
"test" s = AppendTest(s, "suffix")
• Dim s As String
= "test" s = AppendTest("suffix")
3. Which of the following types guarantee
atomic reads and writes?
Answers:
• int
• double
• string
• long
• float
4. Which of the following are true regarding
validation in an ASP.NET application?
Answers:
• Server
validation should only be used when there is no client side validation.
• All data should
be validated on the server side.
• Client Side validation
typically provides a faster response (feedback) time than server validation
• A page can not be posted
back unless all client validation has passed.
5. Which of the following are true of using
ADO.NET DataSets and DataTables?
Answers:
• The connection to the
database must remain valid for the life of the data objects
• All tables in a
dataset must come from the same database.
• A given
instance of a DataTable can be in only one DataSet
• Changes made to
multiple tables within a DataSet can easily be transferred to a new DataSet
which contains only the changes
• Content from
multiple DataSets can easily be combined into a single DataSet that contains
the net result of all changes.
6. What is the result of the following code?
Console.WriteLine(CBool(If(1>2,
"True", "False")))
Answers:
• Throws an
InvalidCastException
• TRUE
• FALSE
• None of the
above
7. Given the following code, which calls are
valid ways to add the elements of a string array to a List(Of String)?
Dim
values() As String = {"1", "2", "3",
"4"}
Dim
valueList As New List(Of String)
Answers:
•
valueList.Insert(values)
• valueList =
values
• valueList.Add(values)
•
valueList.AddRange(values)
8. Determining the availability of sufficient
memory for an operation can be accomplished by:
Answers:
• There is no
supported application level means to determine if a specific amount of memory
is available.
• using static
methods of System.Runtime.MemoryFailPoint and checking the return value
• creating an instance of
System.Runtime.MemoryFailPoint and monitoring for an
InsufficientMemoryException
• creating an
instance of System.Runtime.MemoryFailPoint and monitoring for an
OutOfMemoryException
9. With which of the following are Declarative
Databinding expressions delimited?
Answers:
• <%# %>
• <%-- --%>
• <!-- -->
• <# >
10. Which of the following are valid
mechanisms for adding an event handler for Public Event SomeEvent() on class
Sample?
Answers:
• AddHandler
Sample.SomeEvent AddressOf MyEventHandler Public Sub MyEventHandler
• AddHandler
Sample.SomeEvent, AddressOf Sample.SomeEvent
• Private
WithEvents sample As New Sample Public Sub MyEventHandler(sender As Object, e
As EventArgs) Handles sample.SomeEvent
• Private
WithEvents sample As New Sample Public Sub MyEventHandler() Handles
sample.SomeEvent
11. What does the AndAlso operator do?
Answers:
• It performs a
Boolean AND operation, evaluating both operands
• It performs a
Boolean AND operation, evaluating the left-hand side only if the right-hand
side is false
• It performs a
Boolean AND operation, evaluating the right-hand side only if the left-hand
side is false
• It performs a Boolean AND
operation, evaluating the right-hand side only if the left-hand side is true
• None of the
above
12. With which class is the task of mapping a
specific point in time into units such as weeks, months, and years
accomplished?
Answers:
• System.DateTime
• System.TimeSpan
•
System.Globalization.Calender
•
System.Globalization.CultureInfo
13. By which of the following can the .NET
class methods be included in .aspx files?
Answers:
• Including .Net
code within the script element with the runat attribute set to server
• Including .Net
code within the code element
• Including .Net code using
the @code directive on the page
• Including .Net
code within the execute attribute of the individual control
14. Which of the following can you do when
deleting a DataRow from the DataRowCollection of a DataTable?
Answers:
• Use the
DataRowCollection.Remove method to immediately delete the row.
• Use the
DataRowCollection.Remove method to mark the row for deletion when
DataRow.AcceptChanges is called.
• Use the DataRow.Delete
method to immediately delete the row.
• Use the
DataRow.Delete method to mark the row for deletion when DataRowAcceptChanges is
called.
15. Which of the following events should be
used for assigning a Theme dynamically to a page?
Answers:
• PreInit
• Init
• PreLoad
• PreRender
• Render
16. Which of the following is applicable when
using Secure Socket Level communications?
Answers:
• A certificate must be
installed on the server.
• The certificate
must match the web address to prevent a browser warning or error
• The certificate
must be issued by an authority recognized by the client computer to prevent a
browser warning or error
• Once issued, a
certificate is always valid until the expiration date.
17. Which of the following is true about
VB generics?
Answers:
• VB allows
non-type template parameters
• VB supports
explicit specialization
• VB allows the
type parameter to be used as the base class for the generic type
• VB allows a
generic type parameter itself to be a generic
• VB enforces that all codes
are valid for all types of parameters
18. In which of the following ways do
Structures differ from classes?
Answers:
• Structures
cannot implement interfaces
• Structures cannot inherit
from a base structure
• Structures
cannot have events
• Structures
cannot have overrideable methods
19. The earliest event in which all viewstate
information has been restored is:
Answers:
• Init
• PreLoad
• Load
• PreRender
• Render
20. Which method calls will compile the
following?
Private Sub Sample(ByVal number As Integer,
Optional ByVal bool As Boolean = True)
End Sub
Answers:
• Sample(1, True)
• Sample(1)
•
Sample(bool:=False)
• Sample(bool:=False,
number:=1)
•
Sample(bool:=False, 1)
21. The rights of which Windows Account does
anonymous Web Site access use by default?
Answers:
• Administrator
• IUSER_MachineName (where
the MachineName is the actual computer name)
• ASPNET
• Guest
22. In order to enable AJAX Functionality,
which control is placed on the page?
Answers:
• asp:ScriptManager
• asp:AjaxManager
• asp:PageManager
•
asp:ClientScriptManager
23. Via which of the following is ViewState
maintained by default?
Answers:
• A hidden variable within
the page that is included with each round tip.
• A cookie which
resides on the client's computer
• A server side
in-process memory cache
• Instance member
variables of the Page class
24. In order to use the AJAX
AuthenticationSErvice class, which of the following must be true?
Answers:
• It must be
enabled in the web.config of the ASP.Net application.
• Forms
Authentication must be enabled in the web.config of the ASP.Net Application
• Cookies must be
enabled in the browser
• A redirection
url must be supplied for successful login.
• All of the above.
25. In the following example,by which
technique can the method Test in the derived class Cat access the
implementation of MakeNoise in the base class?
Public Class Animal
Public Overridable Sub
MakeNoise()
End Sub
End Class
Public Class Cat
Answers:
• Once overridden, the base
class members are inaccessible rom the derived class.
• Public Sub
Test() Animal.MakeNoise() End Sub
• Public Sub
Test() MyBase.MakeNoise() End Sub
• Public Sub
Test() CType(Me, Animal).MakeNoise() End Sub
26. Which of the following will be executed
without error?
Public Class Fruit
End Class
Public Class Apple
Inherits Fruit
End Class
Answers:
• Dim list As New
List(Of Fruit) list.Add(New Apple) list.Add(New Fruit) Dim apple As Apple =
list(0)
• Dim list As New List(Of
Fruit) list.Add(New Apple) list.Add(New Fruit) Dim fruit As Fruit = list(0)
• Dim list As New
List(Of Apple) list.Add(New Apple) list.Add(New Fruit) Dim apple As Apple = list(0)
• Dim list As New
List(Of Apple) list.Add(New Apple) list.Add(New Fruit) Dim fruit As Fruit =
list(0)
27. Which of the following are true when using
a POST command to access a WebService method?
Answers:
• There is a size
limitation on the parameters that can be passed
• A query string
is used to pass the parameters.
• By default,
JSON formatting is used for serialization
• By default, XML formatting
is used for serialization
• The data is
automatically deserialized into .NET types before the actual Web Service method
is invoked.
28. The earliest event where one can be
assured all child controls exist is:
Answers:
• Load
• LoadComplete
• PreRender
• Init
29. Identify the syntactically correct LINQ query
or queries, assuming dt is a DataTable
Answers:
• Dim result =
(From r In dt Select r.Field(Of Int32)("Value")).Max
• Dim result = Select
r.Field(Of Int32)("Value")).Max From dt
• Dim result =
Select Max("Value") From dt.AsEnumerable
• Dim result = Aggregate
r In dt Into Max(r.Field(Of Integer)("value"))
30. By which contract are the WS-Addressing
action and reply action elements of the soap envelope controllable when the
Windows Communication Foundation is used?
Answers:
• ServiceContract
• OperationContract
• DataContract
• MessageContract
31. Which of the following differentiates a
UserControl from a Custom Server control?
Answers:
• UserControl can
directly express rendering information via markup; a Custom Server control can
not.
• UserControl does not
require the use of the @Register directive; a Custom Server control does
require it.
• UserControl can
make use of script based validation; a Custom Server control can not.
• UserControl can
represent complete compositate hierarchy; a Custom Server control can not.
32. In which file are Predefined Client Side
Validation Scripts defined?
Answers:
•
WebUIValidation.js
•
ClientValidation.js
•
AspNetValidation.js
• USerValidation.js
33. Identify the syntactically correct LINQ
query or queries, assuming dt is a DataTable
Answers:
• Dim key As
String = "test" Dim result = From r In Dt Where r(0) = key Select
r(1)
• Dim key As String =
"test" Dim result = From r In dt.AsEnumerable Where r(0) = key Select
r(1)
• Dim key As
String = "test" Dim result = Select r(1) From r In Dt Where r(0) =
key
• Dim key As
String = "test" Dim result = Select r(1) From r In Dt.AsEnumerable
Where r(0) = key
34. What is the result of
Console.WriteLine("{0}:{1}:{2}", CInt(2.5), CInt(1.5), Fix(1.5))?
Answers:
• 2:2:2
• 3:2:2
• 3:2:1
• 2:2:1
35. Which of the following are true about Nullable types?
Answers:
• A Nullable type
is a reference type.
• A Nullable type
is a structure.
• An implicit
conversion exists from any non-nullable value type to a nullable form of that type.
• An implicit
conversion exists from any nullable value type to a non-nullable form of that
type.
• A predefined
conversion from the nullable type S to the nullable type T exists if there is a
predefined conversion from the non-nullable type S to the non-nullable type T.
36. Which of the following controls allows the
use of XSL to transform XML content into formatted content?
Answers:
•
System.Web.UI.WebControls.Xml
•
System.Web.UI.WebControls.Xslt
•
System.Web.UI.WebControls.Substitution
•
System.Web.UI.WebControls.Transform
37. Where should information about a control
created at design time be stored?
Answers:
•
ApplicationState
• SessionState
• ViewState
• None of the
above
38. When aggregating data, LINQ is:
Answers:
• much faster
than DataTable.Compute
• much slower
than DataTable.Compute
• almost as fast
as DataTable.Compute
39. Which of the following are performed to
fully debug an ASP.NET Application running on the same machine as the debugger?
Answers:
• Enabling debug
information in the .NET Assembly
• Setting the
debug attribute of the compilation element to true in the Web.Com file.
• Setting the
debug element of the AspNet element to true in the machine.config file true.
• Enabling
ASP.NET debugging in the IIS metabase.
40. Which of the following does Event Bubbling
allow composite controls to perform?
Answers:
• Propagate
container related events to the child controls.
• Propagate child
events up to control hierarchy
• Distribute
events between peer child controls.
• Translate
control unhandled control events into exceptions.
41. Which of the following can one use to
detect the user's current language?
Answers:
• Examining the UserLanguages
property of the current Request object.
• Examining the
CurrentCulture property of the current Request object.
• Examining the
CurrentCulture property of the current Thread object.
• Examining the
Language property of the current Page object.
42. Which of the following statements do
Expression Trees fit best?
Answers:
• Expression
trees are a data structure which can be initially composed using language
syntax
• Expression
trees are a dynamically generated code which is executed to perform the desired
function
• Expression
trees can be created only from Lambda Expressions
• Expression
trees can be modified once they are created
• All of the
above
43. Which of the following are included in the
advantages of Lambda Expressions over Anonymous methods?
Answers:
• More concise
syntax
• The types for a
Lambda Expression may be omitted
• The body of an
Anonymous method can not be an expression
• Lambda
Expressions permit deferred type interference, that anonymous methods do not
• All of the
above
44. Which of the following is true regarding
the System.DateTimeOffset structure?
Answers:
• It provides an
exact point in time relative to the UTC time zone
• It combines a
DateTime structure with a TimeZone structure
• It provides
arithmetical operations using values with different offsets from the UTC
• It can be used
to determine the specific TimeZone for a local time
45. Which of the following are common methods
of supplying "Help" information to an ASP.NET application?
Answers:
• Setting the
ToolTip property of a control to a string containing the information.
• using the open
method of the browser window object to open a new browser window and display a
help related ASP.NET page
• Using the
showHelp method of the browser window object to display a topic from a compiled
help file (.chm).
• All of the
above
46. Which of the following can be used to
preserve state information?
Answers:
•
ApplicationState
• SessionState
• ViewState
• Page Instance
Variables
• All of the
above
47. Which of the following elements can be
adjusted when using the ProcessModel element of the Machine.Config file?
Answers:
• The number of
queued requests before returning "Server Busy (error: 503)"
• The maximum
number of threads per processor
• The maximum
number of threads per request
• The maximum
amount of memory utilized per request
48. Which of the following are true about
declarative attributes?
Answers:
• They must be
inherited from the System.Attribute.
• Attributes are
instantiated at the same time as instances of the class to which they are
applied.
• Attribute
classes may be restricted to be applied only to application element types.
• By default, a
given attribute may be applied multiple times to the same application element.
49. Which of the following is not an unboxing
conversion?
Answers:
• Public Sub
Sample1(ByVal o As Object) Dim i As Integer = CInt(o) End Sub
• Public Sub
Sample1(ByVal vt As ValueType) Dim i As Integer = CInt(vt) End Sub
• Enum E Hello
World End Enum Public Sub Sample1(ByVal et As System.Enum) Dim e As E =
CType(et, E) End Sub
• Public
Interface I Property Value() As Integer End Interface Public Sub Sample1(ByVal
vt As I) Dim i As Integer = vt.Value End Sub
• Public Class C
Private _value As Integer Public Property Value() As Integer Get Return _value
End Get Set(ByVal value As Integer) _value = value End Set
50. Which of the following are true about
System.GC under version 3.5 of the Framework?
Answers:
• You can request
that the garbage collector processes a generation if it determines that it is
appropriate at specific points in your code
• You can control
the intrusiveness of the garbage collector (how often it performs collections)
while your program is running
• You can control
the intrusiveness of the garbage collector (how often it performs collections)
only during application initialization
• You should
specify LowLatency when using Concurrent Server Garbage Collection to improve
memory utilization
51. When using a JavaScript timer control in
conjunction with UpdatePanels, which of the following statements are true?
Answers:
• The interval
will never restart before the page postback is complete.
• The timer
control must be located outside of the UpdatePanel
• If the timer
expiration triggers a postback while a previous postback is in progress, the
first postback is canceled.
• The timer must
always be specified as a trigger for the UpdatePanel which is to be updated
when the interval expires.
• None of the
above
52. Which of the following can be used to
control caching within an ASP.NET application?
Answers:
• Using the
@OutputCache directive in the .aspx file.
• Setting the
HttpCachePolicy of the Cache property inside the Response object.
• Using the Cache
propery of the Page Object.
• Setting the
Cache element in the Web.Config file.
• All of the
above
53. Which of the following characteristics
does a LINQ query expression should have?
Answers:
• It must begin
with a from clause
• It must begin
with a select clause
• It can end with
a group clause
• It must contain
at lease one where clause
• An orderby
clause may optionally follow a select clause
54. When using an implicitly typed array,
which of the following is most appropriate?
Answers:
• All elements in
the initializer list must be of the same type.
• All elements in
the initializer list must be implicitly convertible to a known type which is
the actual type of at least one member in the initializer list
• All elements in
the initializer list must be implicitly convertible to a common type which is a
base type of the items actually in the list
• There are no
restrictions on the items in the initializer list as the array is not declared
to be a specific type.
55. When using Cascading Style Sheets (CSS) to
format output, which of the following is/are true?
Answers:
• Styles can be
applied to all elements having the same CssClass attribute
• Styles can be
applied to specific elements based on their ID attribute
• Styles can be
applied to elements based on their position in a hierarchy
• Styles can be
used to invoke script based code
• All of the
above
56. Which of the following are true of
ADO.NET?
Answers:
• It uses a
connected provider model
• It uses Uses a
disconnected provider model
• It includes a
DataAdapter class, which provides a high-performance mechanism for retrieving
data
•
System.Data.Common provides classes that are database agnostic
57. Which directive allows the utilization
of a custom web control in an ASP.NET page?
Answers:
• @Register
• @Include
• @Control
• @Import
58. When Windows Communication Foundation is
used to develop a Web Service, which of the following are supported?
Answers:
• WS-Addressing
•
WS-MetadataExchange
• WS-Security
• WS-Atomic
Transaction
• All of the
above
59. Which of the following are true about
anonymous types?
Answers:
• They can be
derived from any reference type.
• Two anonymous
types with the same named parameters in the same order declared in different
classes have the same type.
• Anonymous types
can have methods
• All properties
of an anonymous type are read/write
• Anonymous types
cannot cross method boundaries.
60. When Windows Communication Foundation is
used, the SessionMode property to disallow, require, or permit is applied to
which contract?
Answers:
• ServiceContract
•
OperationContract
• DataContract
• MessageContract
61. Which of the following is used to remove a
cookie from a client machine?
Answers:
• Remove the
cookie from the System.Web.UI.Page.Request.Cookies collection.
• Remove the cookie
from the System.Web.UI.Page.Request.Browser.Cookies collection.
• Set the Expires
property to DataTime.Now for a cookie in the Web.UI.Page.Response.Cookies
• Remove the
cookie from the System.Web.UI.Page.Response.Cookies collection.
62. Which of the following is/are true
regarding the use of Authentication to control access to the HTML file (.htm
.html)?
Answers:
• ASP.NET
authentication can not be used to control access
• ASP.NET
authentication handles these by default in a manner equivalent to .aspx pages
• The extension
can be associated with aspnet_isapi.dll in IIS for the appropriate directory
• A custom HTTP
Request processor must be installed to examine the URL's and determine the
appropriate access rights.
63. What is the value of b3 after the
following code is executed?
Dim
b1 As Boolean? = True
Dim
B2 As Boolean? = Nothing
Dim
b3 As Boolean? = If(b1 AndAlso b2, b1, b2)
Answers:
•
System.DbNull.Value
• TRUE
• FALSE
• Nothing
• None of the
above(An InvalidCastException is thrown)
64. What does the OrElse operator do?
Answers:
• It performs a
Boolean OR operation, evaluating both operands
• It performs a
Boolean OR operation, evaluating the left-hand side only if the right-hand side
is false
• It performs a
Boolean OR operation, evaluating the right-hand side only if the left-hand side
is false
• It performs a
Boolean OR operation, evaluating the right-hand side only if the left-hand side
is true
• None of the
above
65. Which of the following are true about
Extension methods.
Answers:
• They must be
declared static
• They can be
declared either static or instance members
• They must be
declared in the same assembly (but may be in different source files)
• Extension
methods can be used to override existing instance methods
• Extension
methods with the same signature for the same class may be declared in multiple
namespaces without causing compilation errors
66. Which of the following conditions can trigger
the automatic recycling of an ASP.NET application hosted in IIS?
Answers:
• A specific
number of requests to the application process.
• An absolute
number of bytes process memory utilization .
• A percentage of
physical memory utilized by the process.
• A specific time
interval
• A specific date
and time
67. Which of the following are true about
System.Security.Cryptography under version 3.5 of the framework?
Answers:
• None of the
implementations are FIPS-certified
• Support is
provided for the "Suite B" set of cryptographic algorithms as
specified by the National Security Agency (NSA)
• Cryptography
Next Generation (CNG) classes are supported on XP and Vista systems
• The
System.Security.Cryptography.AesManaged class allows custom block size, iteration
counts and feedback modes to support any Rijndael based encryption
68. Which features that are not supported in
the System.TimeZone class does the System.TimeZoneInfo class provide?
Answers:
• It provides
readable names for both regular time and (if appropriate) daylight savings time
• It provides a
means of enumerating the known time zones that are available on the local
system
• It provides
functionality to create custom time zones
• It provides the
period for which the time zone was in effect. For example : From 1986 to 2006,
it was from the first Sunday in April to the last Sunday in October, but
starting 2007, it is observed from the second Sunday in March to the first
Sunday in November.
69. What is the value of r after the following
code is executed?
Dim
f As Func(Of Integer, Boolean) = Function(x) (x + 2) > 7
Dim
r = f(7)
Answers:
• 9
• TRUE
• The code will
not compile due to an InvalidCastException
• May be 1 or -1,
depending on the system setting for casting Boolean values to integers
70. Which of the following are true of the
System.Text.StringBuilder class?
Answers:
• It is less
efficient than string concatenation when many concatenations are performed.
• There is a
method which formats the string being appended to the StringBuilder, much like
the String.Format.
• The
StringBuilder is most efficient when initialized using the parameterless
constructor.
• All of the
above
• None of the
above
71. Which of the following are true regarding
System.Threading.ReaderWriterLockSlim?
Answers:
• It is optimized
for single processor/core operations
• It is optimized
for usage where writes from multiple sources are common
• A thread which
has a read lock on a resource may not acquire a write lock on the same resource
• By default, a
thread which has a read lock on a resource and attempts to get another read
lock on the same resource will throw an exception
72. Which of the following accurately
describes the class structure when implementing an ASP.Net page which uses the
CodeFile attribute?
Answers:
• The actual
instantiated class is the class defined in the CodeFile.
• The actual
instantiated class is dynamically created and has a base class defined in the
CodeFile.
• The actual
instantiated class is dynamically created and has a member representing the
class defined in the CodeFile.
• The actual
instantiated class is dynamically created and is a co-class of the class
defined in the CodeFile.
73. Which of the following are the goals of
the Windows Communication Foundation?
Answers:
• Bringing
various existing communication technologies into a unified environment.
• Cross
vendor/platform communication.
• Support for
asynchronous communications.
• Support for
distributed applications based on technologies such as MSMQ and/or COM+
• All of the
above
74. When using asynchronous partial updates
with an UpdatePanel, which of the following are true?
Answers:
• Only the
UpdatePanel and any child controls go through the server lifecycle.
• The entire page
always goes through the entire lifecycle.
• Only the
UpdatePanel which initiated the Postback and its child controls can provide
updated information
• UpdatePanels
can not be used with Master Pages.
• TreeView, Menu,
Substitution, and Validation controls can not be used within an UpdatePanel.
75. Where should an instance of an object
which provides services to all users be stored?
Answers:
•
ApplicationState
• SessionState
• ViewState
• None of the
above
76. Which of the following statements are true
about Passport Authentication?
Answers:
• The Passport
SDK must be installed.
• Passport
authentication is a free service for all sites provided by the Microsoft
Corporation.
• Passport
authentication requires a network path between the Client and the Microsoft
Passport Server
• Passport
Authentication provides persistent authentication across sessions
