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XML Web Services and Server Components with C#.NET
Exam Questions, Answers,
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QUESTION 1
You have just created an ASP.Net application using
C#. You also need to confige the Web.config file.
You ensure that Baker can access all of the application's
resources, except for those resources that are located
in the /Apps/ResumeApplication directory. Baker is
a member of the HRDepartment group. What should you
do? (Select the best choice.)
A.
<system.web>
<authorization>
<allow roles="HRDepartment" />
<deny roles="HRExecutives" />
<deny users="*" />
</authorization>
</system.web>
<location path="/apps/resumeApplication">
<system.web>
<authorization>
<allow roles="HRExecutives"/>
<deny users="?" />
</authorization>
</system.web>
B.
<system.web>
<authorization>
<allow roles="HRDepartment" />
<deny roles="HRExecutives" />
<deny users="*" />
</authorization>.
</system.web>
<system.web>
<authorization>
<allow roles="HRExecutives"/>
<deny users="?" />
</authorization>
<system.web>
<authorization>
<allow roles="HRDepartment" />
<deny roles="HRExecutives" />
<deny users="*" />
</authorization>
</system.web>
<location path="/apps/resumeApplication">
</system.web>
C.
<system.web>
<authorization>
<allow roles="HRDepartment" />
<deny users="*" />
</authorization>
</system.web>
<location path="/apps/resumeApplication">
<system.web>
<authorization>
<allow roles="HRExecutives"/>
<deny users="?" />
</authorization>
</system.web>
D.
<location path="/apps/resumeApplication">
<system.web>
<authorization>
<allow roles="HRExecutives"/>
<deny users="?" />
</authorization>
</system.web>
Answer: A
Explanation:
Baker can access all of the application's resources,
including the resources in the /Apps/ResumeApplication
directory. The first <authorization> section
beginning on line 120 grants the HRDepartment group
access to the application; thus, by virtue of his
membership in the HRDepartment group, Baker can access
the application.
The second <authorization> block beginning on
line 200 revokes access to the resources in the /Apps/ResumeApplication
directory from anonymous users, but it does not revoke
this access from Baker.
Therefore, Baker can access the entire application.
QUESTION 2
You have written a class named MyClass that should
be accessed only from a user with a name of "JAMES."
Which of the following lines of code should you use
to control access to your class? (Select the best
choice.)
A. <PrincipalPermissionAttribute(SecurityAction.Demand,
Name := "JAMES")> Public Class MyClass
B. <PrincipalPermissionAttribute(SecurityAction.Demand,
Role := "JAMES")> Public Class MyClass
C. <PublisherIdentityPermissionAttribute(SecurityAction.LinkDemand)
Name :="JAMES"> Public Class MyClass
D. <PublisherIdentityPermissionAttribute(SecurityAction.LinkDemand)
Role :="JAMES"> Public Class MyClass
Answer: A
Explanation:
You should use the code <PrincipalPermissionAttribute(SecurityAction.Demand,
Name := "JAMES")> Public Class MyClass
to allow only a user with a name of "JAMES"
to access the code in MyClass.
QUESTION 3
You have created the code whon below: (Line numbers
are for Reference purposes only.)
01 cRemoteObject CKRemotingApp
02 String sVal
03 String str
04 CKRemotingApp = CType(Activator.GetObject( _
GetType(cRemoteObject), _
"tcp://CKServer:454/ObjectApplicationName"
_
), cRemoteObject)
05 sVal = CKRemotingApp.GetData()
Which line of code results in the object's creation
on the server? (Select the best choice.)
A. Line 03
B. Line 04
C. Line 02
D. Line 01
Answer: B
Explanation:
The object will be created on the server when line
04
CKRemotingApp = CType(Activator.GetObject( _
GetType(cRemoteObject), _
"tcp://servername:8320/ObjectApplicationName"
_
), cRemoteObject)
is executed. Client-activated objects are created
on the server when New() or the Activator.GetObject
method is called. This mechanism causes the same object
on the server to be used by the proxy for all calls
made to the object by the client.
QUESTION 4
You need to use the <keyref> element in an XML
schema definition. One student is related to many
subjects. You need to ensure that datasets created
with the XML data will produce a foreign key constraint
between two columns in two of the tables. Which other
elements must you not use with the <keyref>
element in order to properly build the constraint?
(Select the best choice.)
A. <key>
B. <selector>
C. <field>
D. <union>
E. <choice>
Answer: D, E
Explanation:
The <key> and <keyref> elements are used
to place a foreign key constraint on two fields when
a dataset is created from XML data. The <key>
element identifies the key column of the parent table.
The <keyref> element establishes the link between
a parent column and a child column. When a dataset
is created from the XML schema, a foreign key constraint
will be created with the information supplied by the
<keyref> element.
When you use the <key> and <keyref> elements,
you should use the <selector> and <field>
elements to identify the tables and columns that are
being constrained.
QUESTION 5
You are modifying the XSD schema for the FlightData
data table. You want to add a primary key that consists
of the fields FlightNo and IATAAirportCode. Which
of the following XML code segments should you use?
(Select the best choice.)
A.
<xs:unique name="UniqueFlightData" msdata:PrimaryKey="true">
<xs:selector xpath=".//FlightData" />
<xs:field xpath="FlightNo, IATAAirportCode"
/>
</xs:unique>
B.
<xs:primaryKey name="UniqueFlightData"
>
<xs:selector xpath=".//FlightData" />
<xs:field xpath="FlightNo" />
<xs:field xpath="IATAAirportCode" />
</xs:primaryKey>
C.
<xs:unique name="UniqueFlightData" msdata:PrimaryKey="true">
<xs:selector xpath=".//FlightData" />
<xs:field xpath="FlightNo" />
<xs:field xpath="IATAAirportCode" />
</xs:unique>
D.
<xs:primaryKey name="UniqueFlightData">
<xs:selector xpath=".//FlightData" />
<xs:field xpath="FlightNo, IATAAirportCode"
/>
</xs:primaryKey >
Answer: C
Explanation:
The <xs:unique> element defines a unique constraint.
When combined with the msdata:PrimaryKey="true"
attribute, the element defines a primary key. The
xpath property of the <xs:selector> element
points to the table element to which the constraint
will be applied, and the xpath property of the <xs:field>
element identifies the fields that make up the primary
key.
QUESTION 6
You are queering an SQL server for customers with
Gold status. To do this, you create a SqlDataReader
object that contains data from the CustomerInfo table
in a Microsoft SQL Server database. The SQL Server
data type of one of the columns, Customer Status,
is SmallInt. You want to store the value of the Customer
Status column in a variable named currentIndex. You
need to maintain the best performance. What should
you do? (Select the best choice.)
A. GetValue
B. GetInt16
C. GetInt64
D. GetInt32
Answer: B
Explanation:
In order to read the data in a column of type SmallInt
with the greatest performance, the GetInt16 method
of a SqlDataReader object should be used. For this
reason, when the data type of a column is known, typed
accessors should be used rather than the generic GetValue
method. Once retrieved, column values should be stored
in variables of the appropriate type.
QUESTION 7
You have created an ASP.Net application using C# for
BlueFliers Inc. The application must ensure that all
flight bookings can be shared and displayed quickly
among all users of the application. Which of the following
storage methods should you choose? (Select the best
choice.)
A. an XML file on the Web server
B. an array in the Session object
C. a DataSet object stored in a Cache object
D. an array in a hidden field
Answer: C
Explanation:
You should create a DataSet object with the seismic
data and store the dataset in a Cache object. By placing
the dataset in a Cache object, the dataset resides
in memory on the Web server and is available for all
users of the application.
QUESTION 8
You have created an ASP.Net application for BlueFliers
Inc. You need to ensure that each customer is given
a unique OD. Which schema segment will place the proper
constraint on the CustomerID field? (Select the best
choice.)
A. <xs:PrimaryKey msdata="CustomerID">
B. <xs:unique msdata:IsDataSet="true">
<xs:selector xpath="Table1" />
<xs:field="CustomerID" />
</xs:unique>
C. <xs:element PrimaryKey="CustomerID">
D. <xs:unique msdata:ConstraintName="UniqueKey">
<xs:selector xpath="Table1" />.
<xs:field xpath="CustomerID" />
</xs:unique>
Answer: D
Explanation:
The unique element in an XML schema will create a
unique constraint in a dataset so that no duplicate
values are allowed. The msdata:ConstraintName property
specifies the name of the constraint. The field element
specifies the column that the constraint applies to.
The selector element specifies the table that contains
the column.
QUESTION 9
You are to perform maintenance programming on an existing
ASP.net application used by BlueInc to update their
customers' profile information. Your observation is
shown below:
• The existing code uses a SqlCommand object
to execute thirty Update statements in succession.
• Before each ExecuteNonQuery method, the code
opens a connection to the database.
• After each ExecuteNonQuery command, the code
closes the connection. The code uses the SQL Server
managed provider.
What should you do to improve the performance of the
code? (Select the best choice.)
A. Keep the SqlConnection object open during all Execute
statements.
B. Encompass the Update statements inside a transaction.
C. Use a DataReader object to execute the command.
D. Use OleDbConnection and OleDbCommand objects instead
of SqlConnection and SqlCommand objects.
Answer: A
Explanation:
You should keep the SqlConnection object open during
all Execute statements in order to improve the performance
of the code. Opening and closing connections takes
considerable resources to perform and should only
be performed when needed. You should explicitly close
the connection when your code no longer needs to use
it. You cannot use a transaction in this scenario
unless you leave the connection open during each command.
Transactions are committed when connections are closed.
QUESTION 10
You are standardizing your application using C#'s
exception handling for BlueFlier Inc. BlueFlier is
promoting its frequently flier program. To do this,
you have created a class named ExceptionHandler that
inherits from System.Exception. ExceptionHandler is
the base class for classes that define broad categories
of exceptions, such as LoyaltyPointsRulesException.
LoyaltyPointsRulesException, like all of the broad
category classes, is the base class for more specific
errors such as TooLittlePoints. Which of the following
code will implement these three custom classes as
described? (Select the best choice.)
A.
Public Class TooLittlePoints{
Inherits System.Exception
}
Public Class BusinessRulesException: Inherits TooLittlePoints{
}
Public Class ExceptionHandler:BusinessRulesException{
}
B.
Public Class ExceptionHandler:System.Exception{
}
Public Class BusinessRulesException :ExceptionHandler{
}
Public Class TooLittlePoints:ExceptionHandler{
}
C.
Public Class ExceptionHandler{
Inherits System.Exception
}
Public Class BusinessRulesException{
Inherits System.Exception
}
Public Class TooLittlePoints{
Inherits System.Exception
}
D.
Public Class ExceptionHandler{
}
Public Class BusinessRulesException : ExceptionHandler{
}
Public Class TooLittlePoints
Inherits ExceptionHandler
}
Answer: B
Explanation:
You should not base all of your custom classes on
the System.Exception object because this will not
build the hierarchical structure of exception classes
described in the scenario.
QUESTION 11
You have created a Web services client that will communicate
with a Web service to determine the quantity of each
aircraft spare parts that AirSpares Inc offers. Your
client application will use this information to order
required spare parts. You application must ensure
that AirSpares has enough to meet your orders. You
use the ExecuteNonQuery method of a SqlCommand object.
Which of the following values will be returned by
the ExecuteNonQuery method? (Select the best choice.)
A. an integer indicating the number of rows affected
B. a Boolean value indicating that the command processed
correctly
C. a string with the name of the stored procedure
or query string that executed
D. a string with the description of any errors that
may have occurred
Answer: A
Explanation:
The ExecuteNonQuery method returns an integer indicating
the number of rows that were deleted, inserted or
updated. The method is used to process Transact-SQL
statements that perform Delete, Insert and Update
functions. The ExecuteNonQuery method does not return
any rows, but will populate any output parameters
that are present in the Command object.
QUESTION 12
You are going to deploy your flight reservations application
your client's server at Newark Airport. The application
is to be installed a .NET assembly into the Global
Assembly Cache (GAC). Which tool is not necessary?
(Each choice presents a complete solution.) (Select
all choices that are correct.)
A. Windows Installer
B. Tlbimp.exe
C. Secutil.exe
D. Gacutil.exe
E. Regasm.exe
F. Ngen.exe
G. Disco.exe
H. Tlbexp.exe
Answer: B, C, E, F, G, H
Explanation:
The Windows Installer and the Gacutil.exe utilities
can be used to install .NET assemblies into the GAC.
Secutil.exe is used to manage strong name public key
information or Authenticode signatures. Regasm.exe
is used to register assemblies so that they can be
used by COM components. Ngen.exe is used to compile
native images of .NET applications and assemblies.
Tlbexp.exe and Tlbimp.exe are used to export and import,
respectively, type library information from .NET assemblies
and COM components. Disco.exe is used to discover
the URLs of Web services that are running on a server.
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