單項(xiàng)選擇題

You are developing a Windows Communication Foundation (WCF) service to provide an in-memory cache for many Web applications.The service contract is defined as follows. (Line numbers are included for reference only.)
01 [ServiceContract]
02 public interface IDataCache
03 {
04 ...
05 }06
07
08 public class DataCache : IDataCache
09 {
10 ...
11 }
You need to ensure that all users share the cache.
Which code segment should you insert at line 07?（）

A. [ServiceBehavior(TransactionIsolationLevel = IsolationLevel.RepeatableRead)]
B. [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
C. [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
D. [ServiceBehavior(TransactionIsolationLevel = IsolationLevel.ReadComitted)]

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單項(xiàng)選擇題

You are developing a Windows Service. The Windows Service will host a Windows Communication Foundation (WCF) service.The Windows Service class will inherit from ServiceBase.You need to ensure that the WCF service starts when the Windows Service is restarted.
What should you do in the Windows Service class?（）

A.
B.
C.
D.

單項(xiàng)選擇題

You are developing a Windows Communication Foundation (WCF) service that executes a long-running operation.The service is accessed from your business applications in a server transaction in which the client does not participate.You need to ensure that the transaction times out and aborts if the operation has not completed within 45 seconds.
What should you do?（）

A. Set the service binding sendTimeout attribute to 00:00:45.
B. Apply [ServiceBehavior(TransactionTimeout="00:00:45")] to the service implementation.
C. Set the service binding receiveTimeout attribute to 00:00:45.
D. Apply [OperationBehavior(TransactionScopeRequired=false)] to the service operation.

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