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Microsoft 70-513 Exam Sample Questions

Question: 3

A Windows Communication Foundation (WCF) solution exposes the following service over a TCP binding. (Line numbers are included for reference only.)

01 [ServiceContract]

02 [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]

03 public class DataAccessService

04 {

05 [OperationContract]

06 public void PutMessage(string message)

07 {

08 MessageDatabase.PutMessage(message);

09 }

10 [OperationContract]

11 public string[] SearchMessages(string search)

12 {

13 return MessageDatabase.SearchMessages(search);

14 }

15 }

MessageDatabase supports a limited number of concurrent executions of its methods. You need to change the service to allow up to the maximum number of executions of the methods of MessageDatabase. This should be implemented without preventing customers from connecting to the service.

What should you do?

  1. Change the service behavior as follows.
  2. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple,

    InstanceContextMode = InstanceContextMode.Single)]

  3. Change the service behavior as follows.
  4. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Single,

    InstanceContextMode = InstanceContextMode.PerSession)]

  5. Add a throttling behavior to the service, and configure the maxConcurrentCalls.
  6. Add a throttling behavior to the service, and configure the maxConcurrentSessions.


Answer: C

Question: 4

You are developing a Windows Communication Foundation (WCF) service that allows customers to update financial dat a. The service contract is defined as follows. (Line numbers are included for reference only.)

01 [ServiceContract]

02 public interface IDataUpdate

03 {

04 [OperationContract]

05 [TransactionFlow(TransactionFlowOption.Mandatory)]

06 void Update(string accountNumber, double amount);

07 }

08

09 class UpdateService : IDataUpdate

10 {

11 [OperationBehavior(TransactionScopeRequired = true,

TransactionAutoComplete = false)]

12 public void Update(string accountNumber, double amount)

13 {

14

15 }

16 }

17

You need to ensure that the service is invoked within a transaction. What should you do?

  1. Replace line 01 with the following code.
  2. [ServiceContract(

    SessionMode = SessionMode.NotAllowed)]

  3. Replace line 01 with the following code.
  4. [ServiceContract( SessionMode = SessionMode.Required)]

  5. Insert the following code at line 08.
  6. [ServiceBehavior(

    TransactionAutoCompleteOnSessionClose = false)]

  7. Insert the following code at line 08.

[ServiceBehavior(

ReleaseServiceInstanceOnTransactionComplete = false)]


Answer: B

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Question: 3

A Windows Communication Foundation (WCF) solution exposes the following service over a TCP binding. (Line numbers are included for reference only.)

01 [ServiceContract]

02 [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]

03 public class DataAccessService

04 {

05 [OperationContract]

06 public void PutMessage(string message)

07 {

08 MessageDatabase.PutMessage(message);

09 }

10 [OperationContract]

11 public string[] SearchMessages(string search)

12 {

13 return MessageDatabase.SearchMessages(search);

14 }

15 }

MessageDatabase supports a limited number of concurrent executions of its methods. You need to change the service to allow up to the maximum number of executions of the methods of MessageDatabase. This should be implemented without preventing customers from connecting to the service.

What should you do?

  1. Change the service behavior as follows.
  2. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple,

    InstanceContextMode = InstanceContextMode.Single)]

  3. Change the service behavior as follows.
  4. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Single,

    InstanceContextMode = InstanceContextMode.PerSession)]

  5. Add a throttling behavior to the service, and configure the maxConcurrentCalls.
  6. Add a throttling behavior to the service, and configure the maxConcurrentSessions.


Answer: C

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Question: 1

You are creating a Window s Communication Foundation (WCF) service application. The application needs to service many clients and requests simultaneously. The application also needs to ensure subsequent individual client requests provide a stateful conversation. You need to configure the service to support these requirements. Which attribute should you add to the class that is implementing the service?

  1. [ ServiceBehavior ( InstanceContextMode =
  2. InstanceContextMode.PerSession ,

    ConcurrencyMode = ConcurrencyMode.Single )]

  3. [ ServiceBehavior ( InstanceContextMode =
  4. InstanceContextMode.PerCall ,

    ConcurrencyMode = ConcurrencyMode.Reentrant )]

  5. [ ServiceBehavior ( InstanceContextMode =
  6. InstanceContextMode.PerSession ,

    ConcurrencyMode = ConcurrencyMode.Multiple )]

  7. [ ServiceBehavior ( InstanceContextMode =

InstanceContextMode.PerCall ,

ConcurrencyMode = ConcurrencyMode.Multiple )]


Answer: C

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Question: 3

A Windows Communication Foundation (WCF) solution exposes the following service over a TCP binding. (Line numbers are included for reference only.)

01 [ServiceContract]

02 [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]

03 public class DataAccessService

04 {

05 [OperationContract]

06 public void PutMessage(string message)

07 {

08 MessageDatabase.PutMessage(message);

09 }

10 [OperationContract]

11 public string[] SearchMessages(string search)

12 {

13 return MessageDatabase.SearchMessages(search);

14 }

15 }

MessageDatabase supports a limited number of concurrent executions of its methods. You need to change the service to allow up to the maximum number of executions of the methods of MessageDatabase. This should be implemented without preventing customers from connecting to the service.

What should you do?

  1. Change the service behavior as follows.
  2. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple,

    InstanceContextMode = InstanceContextMode.Single)]

  3. Change the service behavior as follows.
  4. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Single,

    InstanceContextMode = InstanceContextMode.PerSession)]

  5. Add a throttling behavior to the service, and configure the maxConcurrentCalls.
  6. Add a throttling behavior to the service, and configure the maxConcurrentSessions.


Answer: C

Question: 4

You are developing a Windows Communication Foundation (WCF) service that allows customers to update financial dat a. The service contract is defined as follows. (Line numbers are included for reference only.)

01 [ServiceContract]

02 public interface IDataUpdate

03 {

04 [OperationContract]

05 [TransactionFlow(TransactionFlowOption.Mandatory)]

06 void Update(string accountNumber, double amount);

07 }

08

09 class UpdateService : IDataUpdate

10 {

11 [OperationBehavior(TransactionScopeRequired = true,

TransactionAutoComplete = false)]

12 public void Update(string accountNumber, double amount)

13 {

14

15 }

16 }

17

You need to ensure that the service is invoked within a transaction. What should you do?

  1. Replace line 01 with the following code.
  2. [ServiceContract(

    SessionMode = SessionMode.NotAllowed)]

  3. Replace line 01 with the following code.
  4. [ServiceContract( SessionMode = SessionMode.Required)]

  5. Insert the following code at line 08.
  6. [ServiceBehavior(

    TransactionAutoCompleteOnSessionClose = false)]

  7. Insert the following code at line 08.

[ServiceBehavior(

ReleaseServiceInstanceOnTransactionComplete = false)]


Answer: B