Which of the following datatypes are used in situations where you want an ordered set of data elements, where every element is the same datatype, and where you predefine the number of elements that appear in the set?（）

WhenanUNDOsegmentiscreatedmanuallybyyou,itsavailability...

单项选择题When an UNDO segment is created manually by you, its availability status is set to which of the following automatically by Oracle?（）

WhendeterminingthenumberofUNDOsegmentsinadatabase,which...

单项选择题When determining the number of UNDO segments in a database, which of the following choices identifies a factor to consider? （）

Youaretryingtodeterminehowmanydisksortsarehappeningonth...

单项选择题You are trying to determine how many disk sorts are happening on the database right now. Which of the following dictionary tables would you use to find that information?（）