Essential MCSD.NET - 70-320 Exam Interview Questions & Answers:

1. Suppose You have a Dataset object named ES DataSet that is populated with data from a Microsoft SQL
Server database. This object contains insertions, deletions, and updates to the data. You want to
apply the data changes in ES DataSet to the database. You decide to use the Sulligent data
provider. You need to create a data object that you will use to update the database. Which code
segment should you use?
A. SqlDataReader myDataReader;
B. SqlDataAdapter mySqlDataAdapter = new sqlDataAdapter();
C. DataObject myDataObject = new DataObject();
D. SqlParameter myParameter = new SqlParameter();

B. SqlDataAdapter mySqlDataAdapter = new sqlDataAdapter();

2. Suppose You create three Windows services named ES1, ES2, and ES3. You want to install all three
services on a computer named CompanyA by using the Installer tool (Installutil.exe).
On the command line of CompanyA, you enter and run the following command: Install util ES1
ES2 ES3
During the installation process, ES3 throws an installation error. The installation process
completes.
How many of the three services are now installed on CompanyA?
A. None
B. One
C. Two
D. Three

A. None

3. Suppose You are developing an application named ExamSApp by using Visual C# .NET and Visual Basic
.NET. The application will use functions form a DLL written in unmanaged code. One function
requires the calling application to allocate unmanaged memory, fill it with data, and pass the
address of the memory to the function. On returning from the function, the calling application must
deallocate the unmanaged memory.
You need to decide how your application will handle unmanaged memory.
What should you do?
A. Use a byte array.
B. Use the methods of the Marshal class.
C. Use the methods of the MemoryStream class.
D. Derive a new class from the Stream class, and override the allocation methods.

B. Use the methods of the Marshal class.

4. You have a DataSet object named loanCustomersDataSet that contains customers serviced by
the loan department of ExamSlink Inc. You receive a second DataSet object named
assetCustomersDataSet that contains customers serviced by the asset management department
of your company. Both objects have the same structure. You want to merge
assetCustomersDataSet into loanCustomersDataSet and preserve the original values in
loanCustomersDataSet.
Which code segment should you use?
A. loanCustomersDataSet.Merge(assetCustomersDataSet);
B. loanCustomersDataSet.Merge(assetCustomersDataSet, true);
C. assetCustomersDataSet.Merge(loanCustomersDataSet);
D. assetCustomersDataSet.Merge(loanCustomersDataSet, true);

B. loanCustomersDataSet.Merge(assetCustomersDataSet, true);

5. Suppose You create a .NET Remoting object named Patient info that exposes medical patient information.
Because of the confidential nature of the information, you must ensure that the data remains
secure. You want client applications to connect to Patient info over a secure communication
channel. You want to accomplish this task by writing the minimum amount of code.
What should you do?
A. Create your own host application and use a Tcp Channel and Binary Formatter.
B. Create your own host application and use an Http Channel and a Soap Formatter.
C. Install Patient info in an Internet Information Services (IIS) virtual directory.
Configure Patient info to use a Tcp Channel and a Binary Formatter.
Configure IIS to use SSL.
D. Install Patient info in an Internet Information Services (IIS) virtual directory.
Configure Patient info to use an Http Channel and a Soap Formatter.
Configure IIS to use SSL.

D. Install Patient info in an Internet Information Services (IIS) virtual directory.
Configure Patient info to use an Http Channel and a Soap Formatter.
Configure IIS to use SSL.

6. Suppose You create an XML Web service named Postal Code. Your project source includes a codebehind
file and a file named PostalCode.asmx. During implementation, you use the Debug class to
record debugging log messages, to verify values, and to report debugging failures. You want to
deploy Postal Code 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 projects 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 Postal Code class to set the Auto Flash property of the
Debug class to false.
E. Add code to the constructor of the Postal Code class to call the Clear method of the
Debug.Listeners property.

A. Set the project's active configuration to Release and rebuild the DLL.

7. Suppose You create a serviced component named Session Dispenser. This computer is in the
Company.Utilities assembly and is registered in a COM+ server application. Session Dispenser
has multiple callers. You discover that there are logic problems in the Create New Session
method. You want to debug any calls to this method. What should you do?
A. Open the Session Dispenser solution.
Set a breakpoint on the Create New Session method.
Start the debugger.
B. Attach the debugger to the client process.
Set a breakpoint on the SessionDispenser.CreateNewSession method.
C. Attach the debugger to the Company.Utilites.exe process.
Set a breakpoint on the Create New Session method.
D. Attach the debugger to a Dllhost.exe process.
Set a breakpoint on the Create New Session method.

D. Attach the debugger to a Dllhost.exe process.
Set a breakpoint on the Create New Session method.

8. Suppose You are planning to create a Dataset object named ES DataSet to be used in a bond-trading
application. Several developers will need to write code to manipulate myDataSet, and you want to
ensure that ES DataSet is easy for them to use. You decide to create ES DataSet as a strongly
typed data set. Which two actions should you take? (Each correct answer presents part of the
solution. Choose two)
A. Create an XSD schema that defines ES DataSet.
B. Create an XDR schema that defines ES DataSet.
C. Create a class for ES DataSet that is based on the schema and that inherits from the Dataset
class.
D. Create a class for ES DataSet that is based on the schema and that inherits from the
XmlSchema class.
E. Create a key pair for ES DataSet by using the Strong Name tool (Sn.exe).

A. Create an XSD schema that defines ES DataSet.
C. Create a class for ES DataSet that is based on the schema and that inherits from the Dataset
class.

9. Suppose You have a .NET Remoting object named ES ProductLoader. The ES ProductLoader class is a
server-activated Singleton object.
The ES ProductLoader class loads product data into a Microsoft SQL Server database. The Load
method of the ES ProductLoader class is a time-consuming method to call. You are developing a
client application that uses the ES ProductLoader class. You want to ensure that the client
application can continue to respond to user input while the Load method of the ES ProductLoader
class is called.
What should you do?
A. Use an AsyncDelegate instance to call the Load method.
B. Modify the ES ProductLoader class to be derived from IAsyncResult.
C. Configure the ES ProductLoader class to be a client-activated .NET Remoting object.
D. Configure the client application to have its own remoting channel that matches the servers
channel and formatter.

A. Use an AsyncDelegate instance to call the Load method.

10. Suppose You create an XML Web service named Time ESService. Each time ESService is started, it
checks for the existence of an event log named Time ESServiceLog. If TimeServiceLog does not
exist, Time ESService creates it. You discover that when Time ESService creates Time
ESServiceLog, it throws a System.Security.SecurityException. The exception includes the
following message: "Requested registry access is not allowed". You need to resolve this problem.
What should you do?
A. Configure Inetinfo.exe to run as the local administrator user account.
B. Create an installer for Time ESService, and create the new event log in the installer code.
C. Modify the Web.config file by adding an identity element to impersonate the LOGON user
specified by Internet Information Services (IIS).
D. Modify the permissions of the
KEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesEventlog registry key to give
full control to the IUSR_computername user account.

B. Create an installer for Time ESService, and create the new event log in the installer code.