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Exam
: Microsoft 70-310
Title
: Dev XML Web
Services&Server Comp
W/MSVB.net&Ms.net
Framework
Version : Demo
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1. You create a collection of serviced components that performs bank transfers. All the components are
marked with the Transaction(TransactionOption.Required) attribute. All the methods in the components are
marked with the AutoComplete() attribute.
You discover that incorrect balance amounts are being transferred. You decide to debug the components.
During debugging, a System.Runtime.InteropServices.COMException is thrown. The HRESULT for the
exception is 0x8004E002. The exception includes the following message: "The root transaction wanted to
commit, but transaction aborted."
You find that this exception occurs only during the debugging session, and not when the components run
outside of the debugger. This exception is preventing you from continuing to debug the components. You
need to resolve this problem.
What should you do?
A. Remove the AutoComplete attribute from each method. Within each method implementation, add calls to
the ContextUtil.SetComplete() and ContextUtil.SetAbort() methods.
B. Remove the AutoComplete attribute from each method. Within each method implementation, add calls to
the ContextUtil.MyTransactionVote and ContextUtil.DeactivateOnReturn properties.
C. Increase the transaction timeout in the Component Services tool by using the Properties dialog box for
My Computer.
D. Replace each method implementation with the following code segment:
Try
The original method implementation goes here.
Finally
ContextUtil.SetComplete()
End Try
Answer: C
2. You create a .NET Remoting object named MyRemoteObject in an XML Web service named
MyWebService. All method calls made on MyRemoteObject are routed to a single instance of this object.
The state of MyRemoteObject must be maintained between method calls.
You need to register MyRemoteObject as a well-known object provided by MyWebService. You want to
accomplish this goal by adding code to the Web.config file of MyWebService.
Which code segment should you use?
A. <wellknown mode="Singleton" type="MyRemoteObject, MyWebService"
objectUri="MyWebService.rem" />
B. <wellknown mode="Singleton" type="MyWebService.MyRemoteObject,
MyWebService"objectUri="MyRemoteObject.rem" />
C. <wellknown mode="SingleCall" type="MyRemoteObject, MyWebService"
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objectUri="MyWebService.rem" />
D. <wellknown mode="SingleCall" type="MyWebService.MyRemoteObject,
MyWebService"objectUri="MyRemoteObject.rem" />
Answer: B
3. You are using Visual Studio .NET to develop an application that uses a non-COM DLL named
UsefulFunctions.dll. This DLL is written in unmanaged code.
The DLL contains a function that parses a string into an array of string words and an array of numbers. A
call to the function includes the following pseudocode:
input = "A string with 6 words and 2 numbers"
words = Nothing
numbers = Nothing
Parse(input, words, numbers)
After execution, words contains all string words found in input and numbers contains all integers found in
input. You need to enable your application to call this function.
Which code segment should you use?
A. Declare Function Parse Lib "UsefulFunctions.dll" _
(ByVal input As String, ByVal words() As String,
ByVal numbers() As Integer) As Integer
B. Declare Function Parse Lib "UsefulFunctions.dll" _
(ByVal input As String, ByRef words() As String,
ByRef numbers() As Integer) As Integer
C. Declare Function Parse Lib "UsefulFunctions.dll" _
(ByRef input As String, ByVal words() As String,
ByVal numbers() As Integer) As Integer
D. Declare Function Parse Lib "UsefulFunctions.dll" _
(ByRef input As String, ByRef words() As String,
ByRef numbers() As Integer) As Integer
Answer: B
4. You create a serviced component named Tracker that uses attributes to dynamically register itself for
COM+ services. Tracker is in an assembly file named Fabrikam.dll. Tracker uses transactions and
role-based security. The roles and the application identity for Tracker are configured on the development
computer.
You are preparing to hand off Tracker to an administrator for deployment to production computers. You want
all the COM+ configuration information for Tracker to be installed on the production computers.
What should you do?
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A. Use the Component Services tool to export Tracker to an .msi file.
Provide to the administrator the .msi file with instructions to run the installer.
B. Provide to the administrator the Fabrikam.dll file.
Instruct the administrator to copy Fabrikam.dll to all production computers and to install it in the global
assembly cache.
C. Provide to the administrator the Fabrikam.dll file.
Instruct the administrator to use the .NET Services Installation tool (Regsvcs.exe) to install Tracker.
D. Add a new merge module to your solution.
Add Fabrikam.dll to the merge module.
Provide to the administrator the .msm file with installation instructions.
Answer: A
5. You create a .NET Remoting object named Time. The Time class is in the Utils namespace and is in an
assembly file named Fabrikam.dll.
The Time class is hosted in an Internet Information Services (IIS) virtual directory named UtilsSvr. The Time
class is configured to be a server-activated object and uses a URI named Time.rem.
You use a client application named Test.exe to test the Time object. Test.exe creates instances of the Time
object by using the following method signature:
Public Function CreateInstance() As Time
RemotingConfiguration.Configure("Test.exe.config")
Return new Time()
End Function
You want Test.exe to create instances of the Time class on a computer named Hosting.
What should you do?
A. Create a Test.exe.config file that includes the following code segment:
<configuration> <system.runtime.remoting>
<application> <client>
<wellknown
type="Utils.Time, Fabrikam"
url="tcp://Hosting:80/UtilsSvr/Time.rem"/>
</client> </application>
</system.runtime.remoting> </configuration>
B. Create a Test.exe.config file that includes the following code segment:
<configuration> <system.runtime.remoting>
<application> <client>
<wellknown
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type="Utils.Time, Fabrikam"
url="http://Hosting/UtilsSvr/Time.rem"/>
</client> </application>
</system.runtime.remoting> </configuration>
C. Create a Test.exe.config file that includes the following code segment:
<configuration> <system.runtime.remoting>
<application>
<client url="http://Hosting/UtilsSvr/Time.rem">
<activated
type="Utils.Time, Fabrikam"/>
</client> </application>
</system.runtime.remoting> </configuration>
D. Create a Test.exe.config file that includes the following code segment:
<configuration> <system.runtime.remoting>
<application>
<client url="tcp://Hosting:80/UtilsSvr/Time.rem">
<activated
type="Utils.Time, Fabrikam"/>
</client> </application>
</system.runtime.remoting> </configuration>
Answer: B
6. You are creating an XML Web service named WeatherService that provides the current weather
conditions for cities around the world. Your development cycle includes three stages: development, testing,
and production. In each stage, WeatherService will be deployed on a different server.
For testing, you create an ASP.NET application named WeatherTest. To WeatherTest, you add a Web
reference to WeatherService. You then build a user interface and add the necessary code to test the
service.
The WeatherService interface will not change between testing and deployment. You want to ensure that
you do not have to recompile WeatherTest every time WeatherService is moved from one server to another.
What should you do?
A. Each time WeatherService is moved, set the URL property of the generated proxy class to the new
location.
B. Each time WeatherService is moved, set the Web Reference URL property of the generated proxy class
to the new location.
C. Set the URLBehavior property of the generated proxy class to dynamic. Each time WeatherService is
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moved, update the appropriate key in the Web.config file to indicate the new location.
D. Take the location of WeatherService as input to WeatherTest, and set the Proxy property of all proxy
class instances to that location.
Answer: C
7. You are creating an XML Web service named InventoryService for a nationwide clothing retailer. The
service provides near real-time inventory information to individual store managers by using a virtual private
network (VPN).
InventoryService exposes a Web method named RetrieveInventory that returns inventory information to the
caller. You configure Internet Information Services (IIS) and InventoryService to use Integrated Windows
authentication.
You need to write code in InventoryService to ensure that only members of the Manager group can access
RetrieveInventory.
What should you do?
A. To the <authorization> section of the Web.config file, add the following element:
<allow roles="Manager" />
B. To the <authorization> section of the Web.config file, add the following element:
<allow users="Manager" />
C. In RetrieveInventory, add the following code segment:
If User.Identity.Name.Equals("Manager") Then
Code to retrieve inventory data goes here.
End If
D. In RetrieveInventory, add the following code segment:
If User.Identity.AuthenticationType.Equals("Manager") _
Then
Code to retrieve inventory data goes here.
End If
Answer: A
8. Your Microsoft SQL Server database has a stored procedure named GetCompanyName.
GetCompanyName accepts one parameter named @CustomerID and returns the appropriate company
name.
You instantiate a SqlCommand object named myCommand. You need to initialize myCommand to return
the company name for @CustomerID with a value of "ALFKI".
Which code segment should you use?
A. myCommand.CommandText = "GetCompanyName, ALFKI"
myCommand.Parameters.Add("@CustomerID")
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B. myCommand.CommandText = "GetCompanyName"
myCommand.Parameters.Add("GetCompanyName", "ALFKI")
C. myCommand.CommandText = "@CustomerID"
myCommand.Parameters.Add("GetCompanyName", "ALFKI")
D. myCommand.CommandText = "GetCompanyName"
myCommand.Parameters.Add("@CustomerID", "ALFKI")
Answer: D
9. You are creating data access components for an XML Web service that retrieves data from a Microsoft
SQL Server database. The components use the SqlClient data provider.
You estimate that an average of 10 users will use the service concurrently. Therefore, you want to maintain
at least 15 database connections at all times.
What should you do?
A. Set the Packet Size property of the connectionString to 15.
B. Set the Max Pool Size property of the connectionString to 15.
C. Set the Min Pool Size property of the connectionString to 15.
D. Set the Connection Lifetime property of the connectionString to 15.
Answer: C
10. You have a DataSet object that contains a single DataTable object named Employees. Employees has
a column named EmployeeID. EmployeeID contains no duplicate data.
You are creating a function that accepts a parameter of EmployeeID and searches Employees to return the
DataRow object for the specified EmployeeID.
You want to use the Find method of the rows collection in Employees to return the requested DataRow
object from the function. You need to ensure that you can use the Find method to accomplish this goal.
What should you do?
A. Ensure that EmployeeID is the first column in Employees.
B. Ensure that EmployeeID is unique for each row in Employees.
C. Ensure that Employees has a primary key on EmployeeID.
D. Ensure that Employees is sorted in ascending order on EmployeeID.
Answer: C
11. You create an XML Web service that calculates taxes. You deploy the service to a production computer
named Production. The URL of the production XML Web service is http://Production/WS/TaxCalc.asmx.
The service does not support all international tax rates. You want to find out which unsupported tax rates
are being requested by users. If a user requests a tax rate that is not supported, the service records the
request by using a trace message. You want to view the unsupported rates that have been requested.
Which two actions should you take? (Each correct answer presents part of the solution. Choose two.)
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A. Modify the trace element in the Web.config file of the service by setting the pageOutput attribute to "true".
B. Modify the trace element in the Web.config file of the service by setting the enabled attribute to "true".
C. To the constructor of the TaxCalc class, add the following code segment:
Public Sub New()
InitializeComponent()
Trace.AutoFlush = True
End Sub
D. To the constructor of the TaxCalc class, add the following code segment:
Public Sub New()
InitializeComponent()
Trace.Flush()
End Sub
E. View the page at http://Production/WS/TaxCalc.asmx.
F. View the page at http://Production/WS/Trace.axd.
Answer: BF
12. You create an XML Web service that uses an existing COM component. You implement the service so
that it does not return COM exceptions to its callers. Instead, the service translates the COM exceptions
into more specific exception types based on the HRESULT, as shown in the following code segment:
<WebMethod>
Try
Code to call the COM component goes here.
Catch ce As COMException
Select Case ce.ErrorCode
Case H80070005
Throw New SecurityException("Access denied", ce)
Additional case statements go here.
End Select
End Try
You want to record the original COM exception that was thrown.
What should you do?
A. At the beginning of the catch block, add the following code segment:
Console.WriteLine("{0} COMException caught.", ce)
B. At the beginning of the catch block, add the following code segment:
Context.Trace.Write(ce, "COMException caught.")
C. Within each case statement, add the following code segment:
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ce.ToString()
D. Within each case statement, add the following code segment:
Console.WriteLine("{0} COMException caught.", ce.StackTrace)
Answer: B
13. You create a serviced component named TransferUtil to transfer money between bank accounts.
TransferUtil logs information for failed transfers by using the Trace class. You want TransferUtil to save
these log messages.
Which code segment should you use?
A. Shared Sub New()
Trace.Flush()
End Sub
B. Shared Sub New()
Trace.Listeners.Clear()
End Sub
C. Shared Sub New()
Trace.Listeners.Add( _
new TextWriterListener("transfer.log"))
End Sub
D. Protected Overloads Overrides Sub Finalize()
Trace.Flush()
End Sub
E. Protected Overloads Overrides Sub Finalize()
Trace.Listeners.Clear()
End Sub
F. Protected Overloads Overrides Sub Finalize()
Trace.Listeners.Add( _
new TextWriterListener("transfer.log"))
End Sub
Answer: C
14. You are creating an XML Web service named BankCustomer that provides bank customer information.
You write code to keep track of error messages, warning messages, and informational messages while the
service is running. You use the Trace class to write the messages to a log file.
On test computers, you want to see error messages and warning messages. On deployment computers,
you want to see error messages, but not warning messages.
Which two code segments should you use? (Each correct answer presents part of the solution. Choose
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two.)
A. Public Shared mySwitch as TraceSwitch
Shared Sub New()
mySwitch = new TraceSwitch("tswitch", _
"a trace switch")
End Sub
B. Public Shared level as TraceLevel
Shared Sub New()
level = TraceLevel.Error
End Sub
C. Trace.WriteLineIf(mySwitch.TraceError, _
"An error occurred.")
Trace.WriteLineIf(mySwitch.TraceWarning, _
"Warning message")
D. Trace.WriteLineIf(level = TraceLevel.Error , _
"The operation succeeded.")
Trace.WriteLineIf(level = TraceLevel.Warning, _
"Warning message")
E. Trace.WriteLineIf(Not mySwitch Is Nothing, _
"An error occurred.")
Trace.WriteLineIf(Not mySwitch Is Nothing, _
"Warning message")
F. Trace.WriteLineIf(level <> TraceLevel.Off, _
"An error occurred.")
Trace.WriteLineIf(level <> TraceLevel.Off, _
"Warning message")
Answer: AC
15. You create an XML Web service that uses the Trace class to output error messages, warning messages,
and informational messages to a log file. The service uses a TraceSwitch object to filter the trace output.
The DisplayName property of the TraceSwitch object is "globalSwitch". On a development computer, all
trace output appears in the log file.
You move the service to a production computer. You must configure the production XML Web service to
output only error messages to the log file.
What should you do?
A. To the Web.config file, add the following code segment:
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<system.diagnostics>
<switches>
<add name="globalSwitch" value="1" />
</switches>
</system.diagnostics>
B. To the Web.config file, add the following code segment:
<system.diagnostics>
<switches>
<add name="globalSwitch" value="TraceSwitch" />
</switches>
</system.diagnostics>
C. To the Web.config file, add the following code segment:
<system.diagnostics>
<switches>
<add name="TraceSwitch" value="1" />
</switches>
</system.diagnostics>
D. To the Web.config file, add the following code segment:
<system.diagnostics>
<switches>
<add name="TraceSwitch" value="globalSwitch" />
</switches>
</system.diagnostics>
Answer: A
16. You are creating a .NET Remoting object. You want to add code to the object to log error messages and
warning messages. You want the log messages written to both a log file and to the Windows application log.
Which code segment should you use?
A. Dim eventLog As New EventLog("remobj")
Dim fileLog As FileStream = File.Create("remobj.log")
Trace.WriteLine(eventLog, "sample message")
Trace.WriteLine(fileLog, "sample message")
B. Dim eventLog as New EventLog("remobj")
Dim fileLog As FileStream = File.Create("remobj.log")
Trace.Write(eventLog)
Trace.Write(fileLog)
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Trace.WriteLine("sample message")
C. Trace.Listeners.Add(new EventLogTraceListener("remobj"))
Trace.Listeners.Add( _
new TextFileTraceListener("remobj.log"))
Trace.WriteLine("sample message")
D. Trace.Listeners.Add(new EventLogTraceListener())
Trace.Listeners.Add( _
new TextFileTraceListener("remobj.log"))
Trace.WriteLine("sample message")
Answer: C
17. You are creating an XML Web service named Tracker to track orders for your company. Tracker
includes a Web method named OrderStatus for tracking the status of individual orders. You anticipate that
many client applications will use the service.
You want administrators of Tracker to be able to monitor the requests per second for OrderStatus.
Which code segment should you use?
A. Dim counter As New PerformanceCounter("Tracker", _
"OrderStatus req/sec", False)
B. PerformanceCounterCategory.Create("Tracker", _
"category", "OrderStatus req/sec", "req/sec")
C. Dim counterData() As CounterCreationData = _
{New CounterCreationData("OrderStatus req/sec",
"help", PerformanceCounterType.RateOfCountsPerSecond32)}
Dim collection As New _
CounterCreationDataCollection(counterData)
PerformanceCounterCategory.Create("Tracker", _
"Tracker performance counters", collection)
D. Dim counterData() As CounterCreationData = _
{New CounterCreationData("Int32", "second", _
PerformanceCounterType.AverageTimer32)}
Dim collection As New _
CounterCreationDataCollection(counterData)
PerformanceCounterCategory.Create("OrderStatus", _
"requests per second", collection)}
Answer: C
18. You write a serviced component named OrderProcessing that processes customer orders. You cache
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the product list and customer list within OrderProcessing to improve response time.
OrderProcessing has a method named ValidateCache that validates the contents of the cache.
ValidateCache includes the following method signature:
Public Sub ValidateCache(ByVal name as String)
You want to call ValidateCache during development and testing. You do not want to call ValidateCache
when you release your component for deployment. You want to accomplish this task by writing the
minimum amount of code.
Which code segment should you use?
A. Public Sub ValidateCache(ByVal name as String)
Debug.Assert(False)
Method body goes here.
End Sub
B. #If DEBUG Then
Public Sub ValidateCache(ByVal name as String)
Method body goes here.
End Sub
#End If
C. <DebuggerHidden()> _
Public Sub ValidateCache(ByVal name as String)
Method body goes here.
End Sub
D. <Conditional("DEBUG")> _
Public Sub ValidateCache(ByVal name as String)
Method body goes here.
End Sub
Answer: D
19. You create a strongly named serviced component. The component uses a third-party .NET assembly
named Fabrikam.Encryptor.dll to perform encryption and decryption. Fabrikam.Encryptor.dll is registered in
the global assembly cache. You deploy the serviced component and Fabrikam.Encryptor.dll to a production
computer.
A new version of Fabrikam.Encryptor.dll becomes available. You remove the original version and install the
new version on the production computer. The serviced component throws a System.TypeLoadException
when it attempts to use Fabrikam.Encryptor.dll. You need to correct this problem.
What should you do?
A. Unregister and then re-register the serviced component in the global assembly cache.
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B. Use the Strong Name tool (Sn.exe) to create a new key file for the serviced component.
C. Create a configuration file named Dllhost.exe.config to redirect the serviced component to the new
version of Fabrikam.Encryptor.dll.
D. Create a publisher policy assembly for Fabrikam.Encryptor.dll and register the assembly in the global
assembly cache.
Answer: C
20. You create an XML Web service named PostalCode. Your project source includes a code-behind file
and a file named PostalCode.asmx.
During implementation, you use the Debug class to record debugging log messages, to verify parameter
values, and to report debugging failures.
You want to deploy PostalCode to a production computer. You do not want any of the debugging code to
execute on the production computer.
What should you do?
A. Set the project active configuration to Release and rebuild the DLL.
B. Modify the trace element of the Web.config file by setting the enabled attribute to "false".
C. Modify the compilation element of the Web.config file by setting the debug attribute to "false".
D. Add code to the constructor of the PostalCode class to set the AutoFlush property of the Debug class to
false.
E. Add code to the constructor of the PostalCode class to call the Clear method of the Debug.Listeners
property.
Answer: C