- Exam Code: 70-503
- Exam Name: TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation
- Updated: Aug 11, 2026
- Q & A: 270 Questions and Answers
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| Section | Objectives |
|---|---|
| Configuring and Hosting WCF Services | - Service configuration
|
| Security in WCF Services | - Secure communication
|
| Designing and Developing WCF Services | - Service contracts and data contracts
|
| WCF Bindings and Messaging | - Message patterns
|
| Client Configuration and Consumption | - Service consumption
|
1. You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service contains the following code segment.
Client applications pass an instance of the Customer class to the service.
You create a new version of the data contract and replace the Name property with the FirstName property.
You need to ensure that the existing client applications can continue to consume the service without modifying their code.
Which code segment should you use?
A) Option A
B) Option D
C) Option C
D) Option B
2. You are creating a client application that will call a Windows Communication Foundation service. The service was created by using Microsoft .NET Framework 3.5.
You write the following code segment.
[DataContract]
public class CreditCard {
private string cardNumber = 0; [DataMember] public string Name { get; set; } [DataMember] public string CardNumber { get { return cardNumber; } set { if (!IsValidCreditCardNumber(value)) { throw new ArgumentException("Invalid credit card number"); } cardNumber = value; } }
} You plan to share the validation logic between the client application and the WCF service.
You need to generate a client-side service proxy that includes the validation logic.
Which four tasks should you perform? (Each correct answer presents part of the solution. Choose four.)
A) In the Client project, use the Add Reference dialog box to add a project reference to the Service project.
B) Create a Class Library project for the DataContract classes.
C) In the Service project, add a reference to the Class Library project.
D) In the Client project, use the Add Web Reference dialog box to reference the service.
E) In the Client project, add a reference to the Class Library project.
F) In the Client project, use the Add Service Reference dialog box to reference the service.
3. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service has an operation contract named GetMessage.
You write the following code segment to implement the service. (Line numbers are included for reference only.)
You need to send the contents of the File.xml file to a client application by using the SOAP body.
Which code segment should you insert at line 08?
A) Option A
B) Option D
C) Option C
D) Option B
4. You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5.
You create an instance of the ServerHost class. You plan to host the WCF service in a Windows service.
You need to link the lifetime of the WCF service to the lifetime of the Windows service.
Which three actions should you perform on the instance of the ServerHost class? (Each correct answer presents part of the solution. Choose three.)
A) Override the RequestAdditionalTime method.
B) Override the OnStop method.
C) Override the InitializeLifetimeService method.
D) Subscribe to the Faulted event.
E) Override the GetLifetimeService method.
F) Override the OnStart method.
5. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. Client applications receive the original fault messages that the service generates. You need to create a custom service behavior to add a fault message handler to all channel dispatchers. What should you do?
A) Implement the IClientMessageFormatter interface to create a fault message handler.
Implement the IServiceBehavior interface to create a custom behavior to add the fault
message handler to all channel dispatchers.
B) Implement the IClientMessageInspector interface to create a fault message handler.
Implement the IEndpointBehavior interface to create a custom behavior to add a fault
message handler to all channel dispatchers.
C) Extend the ExceptionHandler class to create a fault message handler.
Implement the IEndpointBehavior interface to create a custom behavior to add the fault
message handler to all channel dispatchers.
D) Implement the IErrorHandler interface to create a fault message handler.
Implement the IServiceBehavior interface to create a custom behavior to add a fault
message handler to all channel dispatchers.
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: B,C,E,F | Question # 3 Answer: B | Question # 4 Answer: B,E,F | Question # 5 Answer: D |
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