Microsoft TS Microsoft .NET Framework 2.0 Application Development Foundation Set 6

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Microsoft TS Microsoft .NET Framework 2.0 Application Development Foundation Set 6

You are developing a method to hash data with the Secure Hash Algorithm. The data is passed to your method as a byte array named message. You need to compute the hash of the incoming parameter by using SHA1.
You also need to place the result into a byte array named hash. Which code segment should you use?

Dim objSHA As New SHA1CryptoServiceProvider
Dim hash() As Byte = objSHA.ComputeHash(message) ✘ Dim objSHA As New SHA1CryptoServiceProviderDim hash() As Byte = Nothing
objSHA.TransformBlock(message, 0, message.Length, hash, 0) ✘ Dim objSHA As New SHA1CryptoServiceProviderDim hash() As Byte = BitConverter.GetBytes(objSHA.GetHashCode) ✘ Dim objSHA As New SHA1CryptoServiceProviderobjSHA.GetHashCode()
Dim hash() As Byte = objSHA.Hash ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You are developing an application that uses role-based security. The principal policy of the application domain is configured during startup with the following code. AppDomain.CurrentDomain.SetPrincipalPolicy(
_ PrincipalPolicy.WindowsPrincipal) You need to restrict access to
one of the methods in your application so that only members of the local Administrators group can call the method. Which attribute should you place on the method?

✘ ✘ ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You are developing a method to call a COM component. You need to use declarative security to explicitly request the runtime to perform a full stack walk. You must ensure that all callers have the required level of trust for COM interop before the callers execute your method. Which attribute should you place on the method?

SecurityAction.Assert, _
Flags:=SecurityPermissionFlag.UnmanagedCode) _
> ✘ Flags:=SecurityPermissionFlag.UnmanagedCode) _
> ✘ Flags:=SecurityPermissionFlag.UnmanagedCode) _
> ✘ Flags:=SecurityPermissionFlag.UnmanagedCode) _
> ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You are developing a method to hash data for later verification by using the MD5 algorithm. The data is passed to your method as a byte array named message. You need to compute the hash of the incoming parameter by using MD5. You also need to place the result into a byte array. Which code segment should you use?

Dim objAlgo As HashAlgorithm = HashAlgorithm.Create("MD5") Dim hash() As Byte =
BitConverter.GetBytes(objAlgo.GetHashCode) ✘ Dim objAlgo As HashAlgorithmobjAlgo = HashAlgorithm.Create(message.ToString)
Dim hash() As Byte = objAlgo.Hash ✘ Dim objAlgo As HashAlgorithm = HashAlgorithm.Create("MD5") Dim hash() As Byte =objAlgo.ComputeHash(message) ✘ Dim objAlgo As HashAlgorithm = HashAlgorithm.Create("MD5") Dim hash() As ByteobjAlgo.TransformBlock(message, 0, message.Length, hash, 0) ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You are developing a method that searches a string for a substring. The method will be localized to Italy.
Your method accepts the following parameters:
The string to be searched, which is named SearchList
The string for which to search, which is named SearchValue
You need to write the code.
Which code segment should you use?

Dim objComparer As CompareInfo = _
New CultureInfo("it-IT").CompareInfo
Return objComparer.Compare(SearchList, SearchValue) ✘ Return SearchList.IndexOf(SearchValue) ✘ Dim objComparer As CompareInfo = _New CultureInfo("it-IT").CompareInfo
If objComparer.IndexOf(SearchList, SearchValue) > 0 Then Return True
Else
Return False
End If ✘ Dim objComparer As CompareInfo = _New CultureInfo("it-IT").CompareInfo
If SearchList.IndexOf(SearchValue) > 0 Then
Return True
Else
Return False
End If ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You are developing an application for a client residing in Hong Kong. You need to display negative currency values by using a minus sign. Which code segment should you use?

Dim objCulture As NumberFormatInfo = _
New CultureInfo("zh-HK").NumberFormat
objCulture.NumberNegativePattern = 1
Return NumberToPrint.ToString("C", objCulture)

✘

Dim objCulture As NumberFormatInfo = _New CultureInfo("zh-HK").NumberFormat
Return NumberToPrint.ToString("-{0}", objCulture)

✘

Dim objCulture As NumberFormatInfo = _New CultureInfo("zh-HK").NumberFormat
Return NumberToPrint.ToString("()", objCulture)

✘

Dim objCulture As NumberFormatInfo = _New CultureInfo("zh-HK").NumberFormat
objCulture.CurrencyNegativePattern = 1
Return NumberToPrint.ToString("C", objCulture)

✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You need to generate a report that lists language codes and region codes. Which code segment should you use?

For Each objCulture As CultureInfo In _
CultureInfo.GetCultures(CultureTypes.NeutralCultures) ...
Next ✘ For Each objCulture As CultureInfo In _CultureInfo.GetCultures(CultureTypes.SpecificCultures) ...
Next ✘ Dim objCulture As New CultureInfo("")Dim objTypes As CultureTypes = objCulture.CultureTypes ... ✘ For Each objCulture As CultureInfo In _CultureInfo.GetCultures(CultureTypes.ReplacementCultures) ...
Next ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You need to select a class that is optimized for key-based item retrieval from both small and large collections.
Which class should you choose?

ListDictionary class ✘ HybridDictionary class ✘ Hashtable class ✘ OrderedDictionary class ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You are creating a class named Temperature. The Temperature class contains a public field named F. The public field F represents a temperature in degrees Fahrenheit. You need to ensure that users can specify whether a string representation of a Temperature instance displays the Fahrenheit value or the equivalent Celsius value. Which code segment should you use?

Public Class Temperature
Implements IFormattable
Public F As Integer
Public Function ToString ( ByVal format As String, _ ByVal fp As IFormatProvider ) As String _ Implements
IFormattable.ToString If (format = "F" Or format = Nothing) Then
Return F.ToString ()
End If
If format = "C" Then
Return ((F - 32) / 1.8). ToString ()
End If
Throw New FormatException ("Invalid format string")
End Function End Class ✘ Public Class Temperature
Implements ICustomFormatter
Public F As Integer
Public Function Format( ByVal formatString As String, _ ByVal arg as object, ByVal fp As IFormatProvider )
_ As String Implements ICustomFormatter.Format
If formatString = "C" Then
Return ((F - 32) / 1.8). ToString ()
End If
If formatString = "F" Then Return arg.ToString ()
End If
Throw New FormatException ("Invalid format string")
End Function End Class ✘ Public Class Temperature Public F As Integer Public Function ToString ( ByVal format As String, _ ByVal fpAs IFormatProvider ) As String If format = "C" Then Return ((F - 32) / 1.8).
ToString ()
Else
Return Me.GetType (). ToString ()
End If
End Function End Class ✘ Public Class TemperaturePublic F As Integer
Protected format As String Public Overrides Function ToString () As String
If format = "C" Then
Return ((F - 32) / 1.8). ToString ()
End If
Return F.ToString ()
End Function End Class ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

10.

You need to create a method to clear a Queue named q. Which code segment should you use?

Dim e As Object For Each e In q ✘ Dequeue ()Next ✘ Dim e As Object For Each e In q ✘ Enqueue (Nothing)Next ✔ q.Clear () ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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Microsoft TS Microsoft .NET Framework 2.0 Application Development Foundation Set 6

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