Microsoft TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation : 70-503 Exam

  • Exam Code: 70-503
  • Exam Name: TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation
  • Updated: Jun 09, 2026
  • Q & A: 270 Questions and Answers

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

1. You create a stateless, thread-safe service by using Microsoft .NET Framework 3.5.
You use the Windows Communication Foundation model to create the service. Load testing reveals that the service does not scale above 1,000 concurrent users. You discover that each call to the service instantiates a new service instance. You also discover that these service instances are expensive to create. You need to ensure that 5,000 concurrent users can access the service.
Which code segment should you use?

A) <ServiceBehavior(_
lnstanceContextMode:=lnstanceContextMode.Single, _ConcurrencyMode:=ConcurrencyMode.Reentrant)> _
B) <ServiceBehavior(_ lnstanceContextMode:=lnstanceContextMode.Single, _ConcurrencyMode:=ConcurrencyMode.Multiple)> _
C) <ServiceBehavior(_ InstanceContextMode:=lnstanceContextMode.PerCall, _ConcurrencyMode:=ConcurrencyMode.Multiple)> _
D) <ServiceBehavior(_ InstanceContextMode:=lnstanceContextMode.PerCall, _ConcurrencyMode:=ConcurrencyMode.Reentrant)> _


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

You need to ensure that the service instance is recycled when the transaction is complete. Which line of code should you insert at line 06?

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


3. You are creating a distributed application by using Microsoft .NET Framework 3.5.
The application uses the Windows Communication Foundation model.
You need to ensure that the following requirements are met:
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

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


4. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service will be hosted on a Web server. You add the following code fragment to the .svc file. <% @ServiceHost Factory="ExamServiceFactory" Service="ExamService" %>
You need to create the 3 instances of the services by using the custom ExamServiceFactory class.
Which code segment should you use?

A) public class ExamServiceFactory : ServiceHostj protected override void
ApplyConfigurationO {
//Implementation code comes here. }}
B) public class ExamServiceFactory : ServiceHostj public ExamServiceFactory(Type
serviceType, params Uri[] baseAddresses): base(serviceType, baseAddresses) {
//Implementation code comes here. }}
C) public class ExamServiceFactory : ServiceHostFactoryj protected override ServiceHost
CreateServiceHost(Type serviceType, Uri[] baseAddresses) {//Implementation code
comes here.}
D) public class ExamServiceFactory : ServiceHostBasej protected override void
ApplyConfigurationQ {//Implementation code comes here. }}


5. You create a Windows Communication Foundation client application by using Microsoft .NET Framework 3.5. The client application communicates with an existing Web service that requires custom HTTP headers. You need to ensure that all messages sent to the service include the headers. Which two tasks should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Create a custom endpoint behavior. Add the message inspector by using the IEndpointBehavior.AddBindingParameters method.
B) Create a message inspector. Insert the custom headers by using the ICIientMessagelnspector.AfterReceiveReply method.
C) Create a message inspector. Insert the custom headers by using the ICIientMessagelnspector.BeforeSendRequest method.
D) Create a custom endpoint behavior. Add the message inspector by using the IEndpointBehavior.ApplyClientBehavior method.


Solutions:

Question # 1
Answer: B
Question # 2
Answer: A
Question # 3
Answer: B,C
Question # 4
Answer: C
Question # 5
Answer: C,D

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