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單項(xiàng)選擇題

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?（）

A.REF
B.TABLE
C.CLOB
D.VARRAY

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單項(xiàng)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

單項(xiàng)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

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