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rewrite the current application as a .NET application. This .NET application does not need to
be backward compatible with the current application. You must ensure that this new application meets the
following requirements:
" Must support asynchronous processing.
" Must be able to pass data through firewalls.
" Must pass only SOAP-Compliant formatted data validated by using an XSD schema.
" Must not be limited to client computers running on a Microsoft operating system.
You want to accomplish this task by using the minimum amount of development effort.
Which type of .NET application should you use?
A. Windows service
B. XML Web service
C. Serviced component
D. .NET Remoting object
Answer: B
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Explanation: An XML Web service would:
* support asynchronous processing.
* XML traffic would be allowed to passed through firewalls
* can use SOAP-compliant formatted data validated by an XSD schema.
* could be implemented on heterogeneous systems.
Reference: Designing Distributed Applications with Visual Studio .NET, Programming the Web with XML
Web Services
Incorrect Answers
A: A Windows service can only run on a Windows computer.
C: Serviced components cannot be run on heterogeneous systems. Note: A serviced component is a class that is
authored in a CLS-compliant language and that derives directly or indirectly from the
System.EnterpriseServices.ServicedComponent class. Classes configured in this way can be hosted by a COM+
application and can use COM+ services.
D: .NET Remoting objects can be run on different operating systems. However, a XML Web service meets the
requirement in a better way.
QUESTION 52 You are creating a .NET Remoting object named Payroll. The Payroll class allows remote
client applications to access payroll data for your company. Client applications are developed by using
Windows Forms and Web Forms. You must ensure that remote client applications are securely authenticated
prior to gaining access to Payroll object. You want to accomplish this task by writing the minimum amount of
code.
What should you do?
A. Use a Tcp Channel and a Binary Formatter for the Payroll class.
B. Use an Http Channel and a Soap Formatter for the Payroll class.
C. Host the Payroll class in Internet Information Services (IIS) and implement Basic authentication.
D. Host the Payroll class in Internet Information Services (IIS) and implement Integrated Windows
authentication.
Answer: D
Explanation: Hosting the application on an IIS server configured for Windows authentication would:
" client applications are securely authentication prior to gaining access to the Class.
" miniminal coding would be required
Incorrect Answers
A: This proposed solution does not address the secure authentication requirement. Note: A Tcp Channel
provides an implementation for a sender-receiver channel that uses the TCP protocol to transmit messages. The
Binary Formatter Class serializes and deserializes an object, or an entire graph of connected objects, in binary
format.
B: This proposed solution does not address the secure authentication requirement. Note: A Http channel
provides an implementation for a sender-receiver channel that uses the HTTP protocol to transmit messages.
The Soap Formatter serializes and deserializes an object, or an entire graph of connected objects, in SOAP
format.
C: Basic authentication is not secure.
QUESTION 53 You are creating an XML Web service named ListBoxService. This service provides content,
such as states, countries, and geographical regions, for use in drop-down list boxes. ListBoxService contains a
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Web method named RetrieveRegionsListBox. This method runs a Dataset object that contains every
geographical region in the world. RetrieveRegionsListBox calls a Microsoft SQL Server database to load the
Dataset object with region data. You want to minimize the amount of time the method takes to return to the
caller.
What should you do?
A. Use a stored procedure to return the datas.
B. Store each Dataset object by using the Session object.
C. Set the Buffer Response property of the Web Method attribute to false.
D. Set the Cache Duration property of the Web Method attribute to an interval greater than zero.
Answer: D
Explanation: The Buffer Response property denotes the number of seconds the response should be held in the
cache. The default is 0, which means the response is not cached. Caching the response would improve
performance.
Reference: .NET Framework Class Library, WebMethodAttribute.CacheDuration Property [C#] .NET
Framework Class Library, WebMethodAttribute.BufferResponse Property [C#]
Incorrect Answers
A: A stored procedure is located at the SQL Server computer. It improves performance, especially if the code is
run repeatedly. However, this is not the case in this scenario.
B: Storing each Dataset object by using session object would increase the overhead.
C: The WebMethodAttribute.BufferResponse property gets or sets whether the response for this request is
buffered. Setting the value to false would not buffer the request.
QUESTION 54 You are creating an XML Web service named View CertKOrders that is available to customers
over the Internet. View CertKOrders exposes a Web method named View ShippingDetail that requires
additional security. You decide to use generic role-based security to secure View ShippingDetail. You need to
write code to ensure that once the caller is authenticated, a user identity named Generic is created. This user
identity has membership in a group named Shipping to allow access to View ShippingDetail,
Which code segment should you use?
A. System.Security.Principal.IIdentity myIdentity = new
GenericIdentity("Generic", "Custom");
string[] Roles = {"Shipping"};
GenericPrincipal myPrincipal = new
GenericPrincipal(myIdentity, Roles);
myIdentity = WindowsIdentity.GetCurrent();
B. GenericIdentity myIdentity = new
GenericIdentity("Generic", "Custom");
string[] Roles = {"Shipping"};
GenericPrincipal myPrincipal = new
GenericPrincipal(myIdentity, Roles);
C. Thread.CurrentPrincipal = myPrincipal;
IIdentity myIdentity = new
GenericIdentity("Generic", "Shipping"); IPrincipal myPrincipal = new
WindowsPrincipal((WindowsIdentity) myIdentity); Thread.CurrentPrincipal = myPrincipal;
D. IIdentity myGenericIdent = new
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