多项选择题
A. Implement transactions for database queries.
B. Close database connections in the application.
C. Use Microsoft ADO.NET in the data access layer.
D. Implement a retry policy in the data access layer.
单项选择题 A Windows Azure application retrieves data from SQL Azure. You need to recommend an approach for improving application query performance. What should you recommend？（）
单项选择题 An application uses Windows Azure Table storage. The application uses five tables. One table used by the application is approaching the limit for storage requests per second. You need to recommend an approach for avoiding data access throttling. What should you recommend？（）
单项选择题 A Windows Azure application stores data in a SQL Azure database. The application will start an operation that includes three insert statements. You need to recommend an approach for rolling back the entire operation if the connection to SQL Azure is lost. What should you recommend？（）