单项选择题
A. Small for the web application and Medium for the business logic layer
B. Small for the web application and Large for the business logic layer
C. Medium for the web application and Large for the business logic layer
D. Large for the web application and Extra Large for the business logic layer
单项选择题 You are designing an upgrade strategy for a Windows Azure application that includes one web role with one instance. You have the following requirements： - Test the application on the Windows Azure platform. - Ensure that application upgrades can be rolled back. - Ensure that upgrade and rollback processes do not cause downtime. You need to recommend an approach for upgrading the application. What should you recommend？（）
单项选择题 You are designing a Windows Azure application. The application contains one web role and three worker roles. You need to recommend an approach for updating only one role without interrupting the other roles. What should you recommend？（）
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？（）