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

2. You are creating a client application by using Microsoft .NET Framework 3.5. The application will be accessible on the Internet.
You plan to use the wsHttpBinding binding by using HTTPS. The Windows Communication Foundation (WCF) service is hosted by a Windows service. You associate the HTTPS port of the WCF server with an X.509 certificate.
You need to ensure that the client application trusts and validates the certificate.
What should you do?

A) Subscribe to the ServerCertificateValidationCallback event of the System.Net.ServicePointManager class.
Write the validation code in the boolValidate(object sender, X509Certificate cert, X509Chain chain. System.Net.Security.SslPolicyErrors error) event handler on the client side.
B) Derive a class from the System.IdentityModel.Selectors.X509CertificateValidator class.
Create an instance of the derived class on the client side.
Write the validation code in the public override void Validate(X509Certificate2 certificate) method.
C) Derive a class from the System.IdentityModel.Selectors.X509CertificateValidator class.
Create an instance of the derived class on the server side.
Write the validation code in the public override void Validate(X509Certificate2 certificate) method.
D) Subscribe to the ServerCertificateValidationCallback event of the System.Net.ServicePointManager class.
Write the validation code in the boolValidate(object sender, X509Certificate cert, X509Chain chain. System.Net.Security .SslPolicyErrors error) event handler on the server side.

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

4. You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. The WCF service will validate certificates to authorize client applications. You write the following code segment:
class Store: IStore
{
public void RemoveOrder(int ordered)
{
} }
You need to ensure that only those client applications that meet the following criteria can access the RemoveOrder method:
What should you do?

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

5. 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 QueryAnalyzerService :
02 IQueryAnalyzerService, IDisposable {
04 public void Open() {
05}
06 public void ExecuteSql(string sql) {
07...
08!
09 public void Close() {
10...
11}
12 public void Disposed
13...
14}
15...
16}
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( AutoDisposeParameters=true)]
C) [OperationBehavior( ReleaselnstanceMode=ReleaselnstanceMode.BeforeCall))
D) [OperationBehavior( TransactionScopeRequired=true)]

Solutions: