多项选择题
A. Persistent lightweight jobs modify several tables in the data dictionary to generate a lot of redo.
B. The user cannot set privileges on persistent lightweight jobs.
C. Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time.
D. Persistent lightweight jobs are useful when users need to create a small number of jobs that run infrequently.
E. The use of a template is mandatory to create persistent lightweight jobs.
单项选择题 You plan to collect the Automatic Workload Repository （AWR） data every Monday morning for a month. You want Oracle Database to automatically create a baseline every Monday and remove the old baseline. What is the correct action to achieve this？（）
单项选择题 Whichcomponentsareneededforsuccessfulandmostefficientrecovery.（）
单项选择题 You are working as a DBA on the decision support system. There is a business requirement to track and store all transactions for at least three years for a few tables in the database. Automatic undo management is enabled in the database. Which configuration should you use to accomplish this task？（）