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Exam Code: 70-503
Exam Name: TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation
Updated: May 29, 2026
Q & A: 270 Questions and Answers
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1. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You need to host the service in a medium trust environment on a Web server.
Which two bindings should you use? (Each correct answer presents a complete solution. Choose two.)
A) WSDualHttpBinding
B) NetMsmqBinding
C) BasicHttpBinding
D) NetTcpBinding
E) WebHttpBinding
2. You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. The service will authenticate the client applications by using Personal Information Cards. You write the following code segment. (Line numbers are included for reference only.)
You need to ensure that only those client applications that provide a valid e-mail address can execute the Update method. Which code segment should you insert at line 15?
A) Option A
B) Option D
C) Option B
D) Option C
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 A
B) Option D
C) Option B
D) Option C
4. You are creating a distributed application by using Microsoft .NET Framework 3.5. You use Windows Communication Foundation (WCF) to create the application.
The distributed application contains client applications and a WCF service.
The client applications send e-mail address claims to the WCF service. The custom authorization manager of the service examines whether the claims are of the type "http://contoso.com/ClaimTypes/UserStatus".
You write the following code segment. (Line numbers are included for reference only.)
You need to map the claim types that are provided by the client applications to the claim types that are expected by the custom authorization manager of the service.
Which code segment should you insert at line 17?
A) Option A
B) Option D
C) Option B
D) Option C
5. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You write the following code fragment for the configuration setting. (Line numbers are included for reference only.)
01 <wsHttpBinding>
02 <binding name="simple">
04 </binding>
05 </wsHttpBinding>
You need to ensure that the service uses transport security and allows access to anonymous client applications. Which code fragment should you insert at line 03?
A) <security mode="Transport" > transport clientCredentialType="None" /></security>
B) <security mode="Transport" > transport clientCredentialType="Basic" /></security>
C) <security mode="Transport" > <message clientCredentialType="Certificate"></security>
D) <security mode="Transport" > <message clientCredentialType="None"></security>
Solutions:
| Question # 1 Answer: C,E | Question # 2 Answer: B | Question # 3 Answer: C,D | Question # 4 Answer: A | Question # 5 Answer: A |
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