A. Perform a VIP swap.B. Perform an in-place upgrade.C.……

单项选择题You are planning an upgrade strategy for a Windows Azure application.  You need to identify changes that will require application downtime.  Which change will always require downtime？（）

A. Changing the virtual machine size
B. Adding an HTTPS endpoint to a web role
C. Changing the value of a configuration setting
D. Upgrading the hosted service by deploying a new package

单项选择题An application has been migrated to the Windows Azure platform.  The application references a native x86 DLL.  The DLL source code is not available.   The application displays an error when loading the DLL.   You need to recommend an approach for ensuring that the application can load the DLL.  What should you recommend？（）

A. Create a 32bit application to host the DLL.
B. Modify the application to allow unsafe code.
C. Modify the application to call methods in the DLL.
D. Modify the application to target the x86 platform.

多项选择题You are planning the migration of an existing application to Windows Azure and SQL Azure.  The original application includes a Microsoft SQL Server 2008 database.   You need to recommend an approach for ensuring that the database migrates successfully toSQL Azure.  Which two actions should you recommend？（）

A. Remove all clustered indexes from the database.
B. Remove all dependencies on the Microsoft Distributed Transaction Coordinator （MSDTC） from the application.
C. Use SSL and SQL authentication to connect to the database.
D. Use SSL and Windows authentication to connect to the database.

单项选择题You are designing a Windows Azure application that will execute long-running business processes.  Applying a configuration change requires role instances to recycle. You must not recycle until processing is finished.  You need to recommend an approach for applying configuration changes.  What should you recommend？（）

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？（）

A. Close the WCF endpoint.
B. Throw an exception to cancel the request.
C. Redirect incoming requests to a different worker role instance.
D. Remove the worker role instance from the load balancer rotation.