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Microsoft 70-503 : TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation
- Exam Code: 70-503
- Exam Name: TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation
- Updated: Sep 17, 2026
- Q & A: 270 Questions and Answers
About Microsoft 70-503 Exam Questions
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Microsoft 70-503 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Client Configuration and Consumption | - Service consumption
|
| Configuring and Hosting WCF Services | - Service configuration
|
| Security in WCF Services | - Secure communication
|
| WCF Bindings and Messaging | - Bindings
|
| Designing and Developing WCF Services | - Service implementation
|
Microsoft TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation Sample Questions:
Question #1
You are replacing an ASMX Web service with a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
The ASMX Web service has a number of existing clients, which you cannot recompile and redeploy. You need to maintain backward compatibility with the existing clients.
Which code fragment should you use?
- A. Option C
- B. Option A
- C. Option E
- D. Option B
- E. Option D
Correct Answer: D 🗳️
Question #2
You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. You create a class named Customer for the WCF service. The Customer class has properties named Id, Name, and BalanceDue.
You plan to convert the Customer class into a data contract.
You need to ensure that only the Id property and the Name property are passed to the client applications.
Which code segment should you use?
- A. Option C
- B. Option A
- C. Option B
- D. Option D
Correct Answer: C 🗳️
Question #3
You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You create the following service contract.
You need to ensure that the DoSomething operation is executed by a single thread at a time.
What are two possible service implementations you should use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
- A. Option C
- B. Option A
- C. Option B
- D. Option D
Correct Answer: A,C 🗳️
Question #4
You are creating a remote database management application by using Microsoft Windows Forms and Microsoft .NET Framework 3.5. You use the Windows Communication Foundation model to create the application.
You write the following code segment. (Line numbers are included for reference only.)
01 Public Class ()ueryAnalyzerService 02 Implements IQueryAnalyzerService, IDisposable
04 Public Sub Open() 05 ...
06 End Sub 07 Public Sub ExecuteSql(ByVal sql As String) 08...
09 End Sub
10 Public Sub Close()
11 ...
12 End Sub
13 Public Sub Dispose() Implements IDisposable.Dispose 14...
15 End Sub 16...
17 End Class
You need to ensure that each time a client application calls the Open0 method, a new service instance is created. Which code segment should you insert at line 03?
- A. <OperationBehavior( _ ReleaselnstanceMode:=ReleaselnstanceMode.None)> _
- B. <OperationBehavior(TransactionScopeRequired:=True)> _
- C. <OperationBehavior(_ ReleaselnstanceMode:=ReleaselnstanceMode.BeforeCall>
- D. <OperationBehavior(AutoDisposeParameters:=True)> _
Correct Answer: C 🗳️
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 C
- B. Option A
- C. Option B
- D. Option D
Correct Answer: D 🗳️
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