微软MCAD 70-310 实战百题

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• 21You are developing a Windows-based application that requires the use of a calculation function named CalculateValue. This function includes the following signature:CalculateValue (int As Integer) As IntegerCalculateValue is located in an unmanaged DLL named UsefulFunc- tions.dll, and is not part of a COM interface. You need to be able to use CalculateValue in your application. Your project directory contains a copy of UsefulFunctions.dll.While you are working in Debug mode, you attempt to run your application. However, a System.DllNotFoundException is thrown.You verify that you are using the correct function named. You also verify that the code in the DLL exposes CalculateValue. You have not modified the project assembly, and you have not modified machine-level security. You need to test your application immediately .What should you do?

  A.Move UsefulFunctions.dll to your project's bin directory

  B.Move UsefulFunctions.dll to your project's Debug directory

  C.Immediately before the declaration of CalculateValue, add the following code segment:

  D.Immediately before the call to CalculateValue, add the following code segment:Dim perm As New SecurityPermission(_SecurityPermissionFlag.UnmanagedCode)perm.Assert()

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• 22You are creating an XML Web service named myService. This service has a function named WriteMessage that writes messages to a flat file in the C:MyLogsmyServiceLog directory.You want to implement security for WriteMessage so that WriteMessage and all the code it calls can write messages only to the myServiceLog directory.Which code segment should you use?

  A.Dim filePermission As New FilelOPermission _(FilelOPermissionAccess.Write, "C:XmyServiceLog") filePermission.Demand()

  B.Dim filePermission As New FilelOPermission(FilelOPermissionAccess.Write, "C:XmyServiceLog") filePermission.Deny()

  C.Dim filePermission As New FilelOPermission _(FilelOPermissionAccess.Write, "C:XmyServiceLog") filePermission.PermitOnly()

  D.Dim filePermission As New FilelOPermission __(FilelOPermissionAccess.Write, "C:myServiceLog") filePermission.Assert()

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• 23You are developing an application that receives product information from external vendors in the form of XML documents. The information will be stored in a Microsoft SQL Server database.The application must validate all incoming XML dat

  A.It uses an XmlValidatingReader object to read each XML document. If any invalid sections of XML are encountered, the inconsistencies are listed in a single document.You must ensure that the validation process runs as quickly as possible. What should you do?A.Set the ValidationType property of the XmlValidatingReader object to Schema

  B.Set the CanResolveEntity property of the XmlValidatingReader object to True

  C.Create and register a ValidationEventHandler method

  D.Use a try/catch block to catch validation exceptions

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• 24You develop a Windows-based application named WinApp that contains a Windows From named Forml. To WinApp, you add a Web reference to an XML Web service named Servicel.Servicel exposes two Web methods named Authenticate and RetrieveData Both methods have sessions enabled. Authenticate authenticates a caller. If the caller is authenticated, Authenticate generates a unique key, stores that key by using the Session object, and returns that key.RetrieveData expects a valid key that has been generated by Authenticate as input before it will return dat

  A.If the key matches the key in the current session, RetrieveData will return data to the customer.You write the following code segment in the Load event handler of Forml(Line numbers are included for reference only)1.Dim servicel As New localhost.Servicel ()2.Dim key As String3.Dim userData As DataSet4.'Insert new code.5.key = servicel.Authenticate(myUser, myPassword)6.userData = servicel.RetrieveData(key)7.dataGridl.DataSource = userDataYou run the application. When line 06 executes the Web service throws an exception, which indicates that the key is invalid. To ensure that the application runs without exceptions, you must insert additional code on line 04.Which code segment should you use?A.servicel.PreAuthenticate = True

  B.servicel.InitializeLifetimeService()C . servicel.CookieContainer = New _System.Net.CookieContainer ()D. Dim cookie As New System.Net.Cookie("Key", key)

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• 25You are creating an XML Web service named Accountinglnformation for your company. AccountInformation exposed a Web method named Get- AccountBalance that returns the account balance as a string. You must limit access to GetAc count Bala nee to users who have credentials stored in your Microsoft SQL Server database.You need to design GetAccountBalance to receive encrypted user credentials by using two custom fields named Username and Password in the SOAP header. To accomplish this goal, you must write the code for GetAccountBalance.Which code segment should you use?

  A.Public Class AuthenticateUser Inherits SoapHeader Public Username As StringPublic Password As String End Class'In the accountInformation class add this code: Public authenticateUserHeader As AuthenticateUser Public Function GetAccountBalance () As String If (authenticateUserHeader Is "") Then Return "Please supply Credentials."Else'Code to authenticate the user and return 'the account balance goes here.End IfEnd Function

  B.Public Class AuthenticateUser Public Username As String Public Password As String End Class'In the accountInformation class add this code: Public authenticateUserHeader As AuthenticateUser Public Function GetAccountBalnce() as String If (authenticateUserHeader Is nn) Then Return "Please supply Credentials."Else'Code to authenticate the user and return 'the account balance goes here.End IfEnd Function

  C.Public Class AuthenticateUser Inherits SoapHeader Public Username As String Public Password As String End Class'In the accountlnformation class add this code: Public authenticateUserHeader As AuthenticateUser Public Function GetAccountBalance() As String If (authenticateUserHeader Is Then Return "Please supply credentials."Else'Code to authenticate the user and return 'the account balance goes here.End IfEnd Function

  D.Public Class AuthenticateUser Public Username As String Public Password As String End Class• In the accountlnformation class add this code: Public authenticateUserHeader As AuthenticateUser Public Function GetAccountBalnce() As String If (authenticateUserHeader I日Then Return "Please supply Credentials."Else'Code to authenticate the user and return 'the account balance goes her

  E.End If End Function

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• 26You create a serviced component named OrderProcessor. Order- Processor implements the IOrderlnit interface. The component and the interface contain the following code segments:<Guidr0B6ABB29-4 3D6-4 0a6-B5F2-83A4 57D0 62ACn)> cinterfaceType(ComlnterfaceType.InterfacelsDual)> Public Interface IOrderlnit 'IOrderlnit methods go here End InterfacePublic Class OrderProcessor Inherits ServicedComponent Implements IOrderlnit 'OrderProcessor methods go here.End ClassYou discover that every time you rebuild OrderProcessor, existing unmanaged client code fails. The HRESULT for the exception is 0x80040154. The exception includes the following message: "Class not registered." You need to resolve this problem.What should you do?

  A.Add a Guid attribute to the OrderProcessor class

  B.Add a Comlmport attribute to the IOrderlnit interface

  C.To the OrderProcessor class, add the following attribute:

  D.To the end of every method, add the following line of code: Marshal.ReleaseComObj ect(Me)

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• 27You create an XML Web service named TimeService. Each time Time- Service is started, it checks for the existence of an event log named TimeServiceLog. If TimeServiceLog does not exist, TimeService creates it.You discover that when TimeService creates TimeServiceLog, it throws a System.Security.SecurityException. The exception includes the following message: "Requested registryaccess is not allowed". You need to resolve this problem.What should you do?

  A.Configure Inetinfo.exe to run as the local administrator user account

  B.Create an installer for TimeService, and create the new event log in the installer code

  C.Modify the Web.config file by adding an identity element to impersonate Che LOGON user specified by Internet Information Services (IIS)

  D.Modify the permissions of theHKEY_LOCAL_MACHINESYSTEMCurrentCont;rolSetServices'Eventlog registry key to give fullcontrol to the IUSR_computername user account

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• 28You are developing a Windows-based application that requires the use of a calculation function named CalculateValue. This functionincludes the following signature:CalculateValue (int As Integer) As IntegerCalculateValue is located in an unmanaged DLL named UsefulFunc- tions.dll, and is not part of a COM interface. You need to be able to use CalculateValue in your application.Which action or actions should you take? (Choose all that apply)

  A.Use Regsvr32.exe to register UsefulFunctions.dll

  B.Use Visual Studio . NET to add a reference to UsefulFunc- tions.dll

  C.To your application, add the following code segment: using UsefulFunctions

  D.To your application, add the following code segment:Public Shared Function CalculateValue(x As Integer) As_Integer

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• 29You are developing an application that queries a table named Products in a Microsoft SQL Server database named Datal. The query will be stored in a string variable named sqlQuery. The query includes the following SQL code:SELECT * FROM Products FOR XML AUTOYou must iterate the query results and populate an HTML table with product information.You must ensure that your application processes the results as quickly as possible.What should you do?

  A.Use a SqlDataAdapter object and set its SelectComir：and property to sqlQuery. Use the Fill method of the SqlDataAdapter object to read the data into a Dataset object. Loop through the associated rows to read the data

  B.Use a SqlDataAdapter object and set its SelectCommand property to sqlQuery. Use the Fill method of the SqlDataAdapter object to read the data into a Dataset object. Use the ReadXml method of the DataSet object to read the data

  C.Set the SqlCommand object's CommandText to sqlQuery. Use the ExecuteReader method of the SqlCommand object to create aSqlDataReader object. Use the Read method of the SqlDataReader object to read the data

  D.Set the SqlCommand object's CommandText to sqlQuery. Use the ExecuteXmlReader method of the SqlCommand object to create an XmlReader object. Use the XmlReader object to read the data

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• 30Your company buys and sells used refrigerators. External vendors frequently send you XML documents that list one type of used appliances for sale. The documents that you receive contain either only washers or only refrigerators as in the following example.<!——A document with refrigerators --><saleList><refrigerators>〈refrigerator type="freezer on bottom", price="210"/> </refrigerators〉</saleList><!-- A document with washers --><saleList><washers><washer type="front load" , price="145"/> <washer type="top load" , price="130"/> </washers></saleList>All incoming XML documents are loaded into a MemorySystem object named used List.You need to automate a process that will discover XML documents contain refrigerator elements. As soon as you ascertain that a document contains refrigerators, you can stop processing the document.You decide to use Visual studio .NET to develop an application that will contain a Boolean variable named hasRefrigerator. A value of True for this variable means that a document contains refrigerator elements. A value of false means that it does not. You want to ensure that the discovery process occurs as quickly as possible.What should you do?

  A.Create an XtalDocument object and load it from used List. Use the SelectSingleNode method to search the XmlDocument object for the saleLisUrefrigerators node. If this node is found, aet hasRefrigerator to True. Otherwise, set hasRefrigerator to False

  B.Create an XmlXPathDocument object and load it from usedList. Use an XPatbNavigator object to search the XmlXPathDocument for the saleLisUrefrigerators node. If this node is found, set hasRefrigerator to True. Otherwise, set hasRefrigerator to False

  C.Create an XmlTextReader object on used List. Loop through usedlist by using the MoveToContent method of the XmlTextReader object and comparing for the sale list/refrigerators node. If this node is found, set hasRefrigerator to True. Otherwise, set hasRefrigerator to False

  D.Create a DataSet object and use its ReadXml method to load used list into the object. If the Count property of the Rows collection of the "refrigerators'* entry in the object is not equal to zero, set hasRefrigerator to Tru

  E.Otherwise, set hasRefrigerator to False

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