70-320 XML Web Services and Server Components with C#.NET Practice Test

Demo Question 3.

You have written a serviced component to create client accounts. You need it to always create a new transaction when it is called. <%@ WebService Language="VB" Class="MyClass"%> <%@ assembly name="System.EnterpriseServices" %> Using System.Web.Services Using System.EnterpriseServices Public Class MyClass Inherits WebService Public Sub CreateNewClientAccount(MyCommand As String) What action should you take so that the CreateNewClientAccount subroutine will always create a new transaction when called? (Select the best choice.)

A. Add a call to the ContextUtil.SetComplete() at the end of the CreateNewClientAccount subroutine.
B. Add a call to the ContextUtil.SetComplete() at the beginning of the CreateNewClientAccount subroutine.
C. Add the <AutoComplete()> attribute to the CreateNewClientAccount declaration.
D. Add the <RequiresNew()> attribute to the CreateNewClientAccount declaration.
E. Add a <Transaction> attribute and specify the TransactionOption.Required value in the CreateNewClientAccount declaration.
F. Add a < WebMethod > attribute and specify the TransactionOption.Required value in the CreateNewClientAccount declaration.
G. Add a <WebMethod> attribute and specify the TransactionOption.RequiresNew value in the CreateNewClientAccount declaration.


Display Answer

Answer: G You should add a <WebMethod> attribute and specify the TransactionOption.RequiresNew value in the CreateNewClientAccount declaration so that the CreateNewClientAccount subroutine will always create a new transaction when called. The subroutine declaration should resemble this code: <WebMethod(TransactionOption:=TransactionOption.RequiresNew)> Public Sub CreateNewClientAccount(MyCommand As String). Web service methods may participate in transactions. The TransactionOption property of the <WebMethod> attribute determines how the method participates in a transaction. The TransactionOption.RequiresNew value indicates that a new transaction will start when the Web service method is called. None of the other actions are appropriate for this scenario.

Explanation: