单项选择题

A.REF B.TABLE C.CLOB D.VARRAYWhichofthefollowingdatatyp……

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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单项选择题WhenanUNDOsegmentiscreatedmanuallybyyou,itsavailabilitystatusissettowhichofthefollowingautomaticallybyOracle?（）

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

单项选择题WhendeterminingthenumberofUNDOsegmentsinadatabase,whichofthefollowingchoicesidentifiesafactortoconsider?（）

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

单项选择题Youaretryingtodeterminehowmanydisksortsarehappeningonthedatabaserightnow.Whichofthefollowingdictionarytableswouldyouusetofindthatinformation?（）

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

单项选择题Todeterminethespaceallocatedfortemporarysegments,theDBAcanaccesswhichofthefollowingviews?（）

A.DBA_TABLESPACES
B.DBA_TABLES
C.DBA_SEGMENTS
D.DBA_FREE_SPACE

单项选择题Bydefault,checkpointshappenatleastasoftenas（）.

A.Redo log switches.
B.UPDATE statements are issued against the database.
C.The SYSTEM tablespace is accessed.
D.SMON coalesces free space in a tablespase.