单项选择题
A. Apply the service configuration changes to the role instance and then recycle the role instance.
B. Suspend each role instance and then apply the service configuration changes to the role instance.
C. Before a change to the service configuration is applied to the role instance， defer recycling until processing is complete.
D. After a change to the service configuration is applied to the role instance， defer recycling until processing is complete.
单项选择题 A Windows Azure application includes a single-threaded worker role that has multiple instances. The worker role hosts a Windows Communication Foundation （WCF） service. Each request to the WCF service takes several seconds to complete. You need to recommend an approach for ensuring that worker role instances do not receive requests while processing. What should you recommend？（）
单项选择题 You plan to host a Windows Communication Foundation （WCF） service in a Windows Azure worker role. Custom code is necessary to initialize and configure the service endpoint. You need to recommend the point at which the application should initialize the WCF service. What should you recommend？（）
单项选择题 You are designing a Windows Azure application. The application will include services hosted in different geographic locations. The service locations may change. You must minimize the cost of communication between services. You need to recommend an approach for calling the services. What should you recommend？（）