70-529VB Exam

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Exam : Microsoft 70-529(VB)
Title : MS.NET Framework 2.0 - Distributed Appl Development


1. You create a Web service that exposes a Web method named CalculateStatistics. The response returned by the CalculateStatistics method for each set of input parameters changes every 60 seconds.
You need to ensure that all requests to the CalculateStatistics method that have the same set of input parameters, and that occur within a 60-second time period, calculate the statistics only once.
Which code segment should you use?
A. <WebMethod()> _
Public Function CalculateStatistics(ByVal values As Integer()) As String
HttpContext.Current.Response.Cache.SetCacheability( _
HttpCacheability.Public, "max-age=60")
...
End Function
B. <WebMethod(CacheDuration:=60)> _
Public Function CalculateStatistics(ByVal values As Integer()) As String
...
End Function
C. <WebMethod()> _
Public Function CalculateStatistics(ByVal values As Integer()) As _
String
HttpContext.Current.Response.Cache.SetExpires( _
DateTime.Now.AddSeconds(60))
...
End Function
D. <WebMethod(BufferResponse:=60)> _
Public Function CalculateStatistics(ByVal values As Integer()) As _
String
...
End Function
Answer: B

2. A file named Util.asmx contains the following code segment. (Line numbers are included for reference only.)
01 <%@ WebService Language="VB" Class="Util" %>
02 Public Class Util
03 Public Function GetData() As String
04 Return "data"
05 End Function
06 End Class
You need to expose the GetData method through a Web service.
What should you do?
　A. Insert the following line of code between lines 01 and 02. <System.Web.Services.WebService()>_
　B. Insert the following line of code between lines 02 and 03. Inherits System.Web.Services.WebService
　C. Insert the following line of code between lines 02 and 03. <System.Web.Services.WebMethod()>_
D. Replace line 01 with the following line of code.
<%@ WebService Language="VB" Class="System.Web.Services.WebService" %>
Answer: C

3. You are creating a Web service to expose the public methods on a class. Two overloaded methods are defined in the class as follows:
Public Function GetCustomer(ByVal custId As String) As Customer
Public Function GetCustomer(ByVal name As String, _
ByVal postalCode As String) As Customer
You need to expose both methods on the Web service.
Which code segment should you use?
A. <WebMethod()> _
<SoapDocumentMethod(Action:="GetCustomerById")> _
Public Function GetCustomer(ByVal custId As String) As Customer
...
End Function
<WebMethod()> _
<SoapDocumentMethod(Action:="GetCustomerByName")> _
Public Function GetCustomer(ByVal name As String, _
ByVal postalCode As String) As Customer
...
End Function
B. <WebMethod(Description:="GetCustomerById")> _
Public Function GetCustomer(ByVal custId As String) As Customer
...
End Function
<WebMethod(Description:="GetCustomerByName")> _
Public Function GetCustomer(ByVal name As String, _
ByVal postalCode As String) As Customer
...
End Function
C. <WebMethod(MessageName:="GetCustomerById")> _
Public Function GetCustomer(ByVal custId As String) As Customer
...
End Function
<WebMethod(MessageName:="GetCustomerByName")> _
Public Function GetCustomer(ByVal name As String, _
ByVal postalCode As String) As Customer
...
End Function
D. <WebMethod()> _
<SoapDocumentMethod(RequestElementName:="GetCustomerById")> _
Public Function GetCustomer(ByVal custId As String) As Customer
...
End Function
<WebMethod()> _
<SoapDocumentMethod(RequestElementName:="GetCustomerByName")> _
Public Function GetCustomer(ByVal name As String, _
ByVal postalCode As String) As Customer
...
End Function
Answer: C

4. You are creating a Web service.
You need to add an operation that can be called without returning a message to the caller.
Which code should you use?
A. <WebMethod()> _
<SoapDocumentMethod(OneWay:=True)> _
Public Function ProcessName(ByVal Name As String) As Boolean
...
Return False
End Function
B. <WebMethod()> _
<OneWay()> _
Public Sub ProcessName()
...
End Sub
C. <WebMethod()> _
<SoapDocumentMethod(OneWay:=True)> _
Public Sub ProcessName()
...
End Sub
D. <WebMethod()> _
<SoapDocumentMethod(Action:="OneWay")> _
Public Sub ProcessName()
...
End Sub
Answer: C

5. You call a method in a Web service. The following exception is thrown in the Web service client.
System.Web.Services.Protocols.SoapException: Server was unable to
process request. --> System.NullReferenceException: Object
reference not set to an instance of an object.
You discover that it is the following line of code that throws the exception.
If Session("StoredValue") Is Nothing Then
You need to ensure that the method runs without throwing the exception.
What should you do?
A. Modify the WebMethod attribute in the Web service so that the EnableSession property is set to True.
B. In the client code for the Web service's proxy object, assign a new instance of the System.Net.CookieContainer object to the CookieContainer property.
C. Add the following element to the System.Web section of the Web.config file.
　<sessionState mode="InProc" />
D. Add the following elements to the System.Web section of the Web.config file.
<httpModules>
<add name="Session" type="System.Web.SessionState.SessionStateModule" />
</httpModules>
Answer: A