You develop an ASP.NET application that consumes a third-party XML Web service named CreditService . CreditService contains a Web method named ChargeCard. ChargeCard takes as input a credit card number, a billing address, and a monetary amount and returns a Boolean variable that indicates whether or not the card was changed.Calls to ChargeCard take one minute to complete. You do not want users to have to wait while ChargeCard executes. You want users to be taken automatically to the next Web page of the application.Which code segment should you use to call CreditService?

试卷相关题目

• 1You have a DataSet object that contains a single DataTable object named Employees. Employees has a column named EmployeelD. EmployeelD contains no duplicate dat

  A.You are creating a function that accepts a parameter of EmployeelD and searches Employees to return the DataRow object for the spec] fied EmployeelD.You want to use the Find method of the rows collection in Employees Co return the requested DataRow object from the function. You needto ensure that you can use the Find method to accomplish this goal. What should you do?A.Ensure that EmployeelD is the first column in Employees

  B.Ensure that EmployeelD is unique for each row in Employees

  C.Ensure that Employees has a primary key on EmployeelD

  D.Ensure that Employees is sorted in ascending order on EmployeelD

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• 2You are creating an XML Web service that processes highly confidential messages. The service exposed a Web method named Retri- eveMessage that takes as input a code name and returns an encrypted message.You create a SOAP extension and override the extension's Process Message method so that you can encrypt the message before it is sent back to the caller.You need to encrypt only the data within the RetrieveMessageResult node of the SOAP response. You create a function named EncryptMessage that encrypts the RetrieveMessageResult node. You need to ensure that this method gets called before sending the message back to the caller.During which SoapMessageStage should you call EncryptMessage?

  A.BeforeSerialize

  B.AfterSerializeC . BeforeDeserializeD. AfterDeserialize

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• 3Your Microsoft SQL Server database contains a table named Customers . Customers contains three columns named FamilyName, PersonalName, and Address.You instantiate a SqlCommand object named CRCommand that you will use to populate a DataReader object named customers Data Reader. You need to initialize CRCommand to load customersDataReader to include FamilyName and PersonalName for all rows in Customers.Which code segment should you use?

  A.CRCommand.CommandText = "SELECT FamilyName, "PersonalName FROM Customers"

  B.CRCommand.CommandType = "SELECT FamilyName,"Personal Name FROM Customers")C . CRCommand.Parameters.Add("SELECT FamilyName, "Personal Name FROM Customers")D. CRCommand.ExecuteNonOuery()

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• 4You have a strongly types DataSet object. This object contains three DataTable objects named Customers, Orders and OrderDetails.Customers and Orders have a data column named CustomerlD. Orders and OrderDetails have a data column named OrderlD.Orders have a foreign key constraint between Customers and Orders on CustomerlD. OrderDetails has a foreign key constraint between Orders and OrderDetails on OrderlD.You want to populate Customers, Orders and OrderDetails with data from Microsoft SQL Server database.In which order should you fill the Data table objects?

  A.Customers, OrderDetails, Orders

  B.OrderDetails, Orders, Customers C . Customers, Orders, OrderDetails D. Orders, OrderDetails, Customers

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• 5You have a .NET Remoting object named ProductLoader. The Product- Loader class is a server-activated Singleton object.The ProductLoader class loads product data into a Microsoft SQL Server database. The Load method of the ProductLoader class is a time-consuming method to call.You are developing a client application that uses the ProductLoader class. You want to ensure that the client application can continue to respond to user input while the Load method of the ProductLoader class is called.What should you do?

  A.Use an AsyncDelegate instance to call the Load method

  B.Modify the ProductLoader class to be derived from IAsyncResult

  C.Configure the ProductLoader class to be a client-activated .NET Remoting object

  D.Configure the client application to have its own remoting channel that matches the server's channel and formatter

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• 6You have a DataSet object named customersDataSet that contains a DataTable object named Customers. Customers retrieves information from a Microsoft SOL Server database. Customers contains a column named Region.You want to create a DataView object named customersDataView that contains only customers in which the value in the Region column is France.Which code segment should you use?

  A.Dim customersDataView As _New DataView(customersDataSet.Tables("Customers")) customersDataView.FindRows("Region = France")

  B.Dim customersDataView As _New DataView(customersDataSet.Tables("Customers")) customersDataView.FindRows("Region = ’France1”）

  C.Dim customersDataView As _New DataView(customersDataSet.Tables("Customers")) customersDataView.RowFilter = ("Region = Franc")

  D.Dim customersDataView As _New DataView(customersDataSet.Tables("Customers")) customersDataView .RowFilter = ("Region = 'France1，'）

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• 7Your Microsoft SQL Server database BackOrders contains a table that consists of more than 1 million rows. You need to develop an application that reads each row in the table and writes the data to a flat file. The application will run only once each day.You want the application to process the data as quickly as possible.Which class should you use to retrieve the data?

  A.DataSet

  B.DataTable

  C.DataReader

  D.DataAdapter

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• 8Your Microsoft SQL Server database has a stored procedure named GetCompanyName which accepts one parameter named @CustomerID and returns the appropriate company name.You instantiate a SqlCommand object named STCommand. You need to initialize STCommand to return the company name for @CustomerID with a value of "ALFKI".Which code segment should you use?

  A.STCommand.CommandText = "GetCompanyName, ALFKI") STCommand.Parameters.Add("@CustomerID")

  B.STCommand.CommandText = "GetCompanyName"STCommand.Parameters.Add("GetCompanyName", "ALFKI")C . STCommand.CommandText = "@CustomerID"STCommand.Parameters.Add("GetCompanyName", "ALFKI")D. STCommand.CommandText = "GetCompanyName"STCommand.Parameters.Add("@CustomerID", "ALFKI”）

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• 9You are creating an XML Web service that will be accessed by callers who cannot use SSL encryption because if firewall restrictions. To protect sensitive data, you want to encrypt a portion of the data returned from the service by using objects in the Cryptography namespace.The service will use a standard encryption routine to encrypt the data before it is sent to the caller. The caller will decrypt the data by using instructions provided by you.You need to write code to encrypt the sensitive data that is in a local variable named myDat

  A.First, you create an instance of a Cryptography Service Provider.What should you do next?A.Create an Encryptor object that passes in a key and an initialization vector (IV) as parameters . Call the GetHashCode method of the Encryptor object to generate a new hash code. Convert the generated hash code to a stream and use the CryptoStream object to write the value of the hash code to an encrypted stream. Convert the output stream to a string

  B.Create a UnicodeEncoding object and use it to encode the valueof myData into a byte array. Use the ComputeHash method of the Cryptography Service Provider to create a hash from the encoded byte array. Convert the output of Compute Hash from a byte array to a string

  C.Create a UnicodeEncoding object and use it to encode the value of myData into a byte array. Use the GetHashCode method of the Cryptography Service Provider to create a hash from the encoded byte array. Convert the output of GetHashCode from a byte array to a string

  D.Create an Encryptor object that passes in a key and an initialization vector(IV) as parameters. Create a Cryp- toStream object that passes in an output stream and the Encryptor object as parameters. Convert myData to a stream and use the CryptoStream object to write the value of myData to an encrypted stream. Convert the output stream to a string

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• 10Your company frequently receives product information from external vendors in the form of XML dat

  A.You receive XML document files, an .xdr schema file, and an xsd schema file.You need to write code that will create a typed DataSet object on the basis of product information. Your code will be used in several Visual studio .NET applications to speed up data processing.You need to create this code as quickly as possible.What should you do?A.Create the code manually

  B.Use XmlSerializer.Serialize to generate the code

  C.Use XmlSerializer.Deserialize to generate the code

  D.Use the Xml Schema Definition tool (Xsd.exe) to generate the code

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