單項選擇題

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

A.Online
B.Pending online
C.Offline
D.Stale

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單項選擇題

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

A.Size of typical transactions
B.Concurrent transactions
C.Size of rows in table most frequently changed
D.Number of anticipated disk sorts

單項選擇題

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?（）

A.V$SESSION
B.V$SYSSTAT
C.DBA_SEGMENTS
D.V$SORT_USAGE

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