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Microsoft 070-503 Exam Syllabus Topics:

Microsoft TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation Sample Questions:

Question 1

You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5.
You add the following code segment to the service.

You add the following code segment to the client application.
01 Public Function PerformCalculations(ByVal numberl As Double, _ ByVal number2 As Double) As Double
03 End Function
You need to ensure that the DisposeCalculator operation is always called.
Which code segment should you insert at line 02?

A. Option A
B. Option B
C. Option D
D. Option C

Question 2

You are creating an endpoint for a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You create the endpoint by using a custom binding.
You write the following code segment.

You need to prevent the custom binding from making a persistent connection to the service endpoint.
Which code segment should you use?

A. Option A
B. Option B
C. Option D
D. Option C

Question 3

You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5.
The WCF service must authenticate the client applications by validating credit card numbers and expiry dates. You write the following code segment. (Line numbers are included for reference only.)
01 class CreditCardTokenAuthenticator: SecurityTokenAuthenticator
02 {
03 // Implementation of other abstract methods comes here.
04 protected override ReadOnlyCollection<IAuthorizationPolicy> ValidateTokenCore(SecurityToken token)
05 {
06 CreditCardToken creditCardToken = token as CreditCardToken;
07 }
09 private bool IsCardValid(string cardNumber, 13 DateTime expirationDate)
10 {
11 // Validation code comes here.
12 }
13 }
You need to implement custom authentication for the WCF service. Which code segment should you insert at line 07?

A. if (IsCardValid(creditCardToken.CardNumber, creditCardToken.ValidTo))
return null;
else
return new List<IAuthorizationPolicy>(0).AsReadOnly();
B. if (IsCardValid(creditCardToken.CardNumber, creditCardToken.ValidTo))
throw new SecurityTokenValidationException();
else
return null;
C. if (IsCardValid(creditCardToken.CardNumber, creditCardToken.ValidTo))
return new List<IAuthorizationPolicy>(0).AsReadOnly();
else
return null;
D. if (IsCardValid(creditCardToken.CardNumber, creditCardToken.ValidTo))
return null;
else
throw new SecurityTokenValidationException();

Question 4

You are creating a Windows Communication Foundation application by using Microsoft .NET Framework 3.5.
You create a service that provides access to the intranet file server of your company. Users must be able to update and delete files from the server by using the service.
You write the following code segment.

You need to ensure that files can be updated or deleted only by users with the required privileges defined in the server's file system ACLs.
What should you do?

A. Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperations="true" />
B. Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperations="false" />
Decorate the Delete and Update methods of the FileServer class by using the following
attribute.
< OperationBehavior(Impersonation : =ImpersonationOption. Required )> _
C. Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperat ions="true" />
Decorate the Delete and Update methods of the IFileServer interface by using the following
attribute.
<OperationBehavior(Impersonation:=ImpersonationOption.Alloraed)>
D. Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperat ions="false" />
Decorate the Delete and Update methods of the IFileServer interface by using the following
attribute.
<OperationBehavior(Impersonation:=ImpersonationOption.Required)> _

Question 5

You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You write the following code segment.

You need to ensure that the service commits the transaction only when the session is closed.
Which code segment should you use to implement the service?

A. Option A
B. Option B
C. Option D
D. Option C

Solutions: