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Microsoft 70-503 Exam Syllabus Topics:

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

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

2. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You write the following code segment to create a service contract. (Line numbers are included for reference only.)

You need to ensure that the client applications always use a binding that supports sessions.
Which code segment should you insert at line 01?

A) <ServiceContract(SessionMode:=SessionMode.Required)>
B) <ServiceContract(SessionMode:=SessionMode.Allowed)> __
C) <ServiceContract(ProtectionLevel:=ProtectionLevel.EncryptAndSign)> __
D) <ServiceContract(ProtectionLevel:=ProtectionLevel._ EncryptAndSign,SessionMode:=SessionMode.Allowed)> __

3. You create a client application by using Microsoft .NET Framework 3.5. The client application uses a Windows Communication Foundation (WCF) service.
The WCF service analyzes incoming message headers to verify whether special processing of the message is required.
The client application accompanies each call to the methods of the service with the address header. You write the following code segment. (Line numbers are included for reference only.)

You need to ensure that the following requirements are met: Which code segment should you insert at line 08?

A) Option C
B) Option A
C) Option B
D) Option D

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

The implementation of the MyMethod operation must call back the CallbackMethod operation.
You need to ensure that the service meets the following requirements:
Which service implementation should you use?

A) Option C
B) Option A
C) Option B
D) Option D

5. You create a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. The WCF service contains the following code segment.

A console application hosts the WCF service. A Microsoft Windows client application uses the WCF service.
You need to implement the callback operation for the client application. You also need to ensure that the callback operation will not encounter deadlocks during execution.
Which code segment should you use?

A) Option C
B) Option A
C) Option B
D) Option D

Solutions: