多项选择题

A.Each segment contains one or more extents.B.Multiple ……

Which three statements are true regarding the logical structure of the Oracle database？（）

A.Each segment contains one or more extents.
B.Multiple tablespaces can share single data file.
C.A data block is the smallest unit of I/O for data files.
D.It is possible to have tablespaces of different block sizes in a database.
E.Each data block in the database always corresponds to one OS block.

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多项选择题WhichtwostatementsregardingtheLOGGINGclauseoftheCREATETABLESPACE...statementarecorrect？（）

A.This clause is not valid for a temporary or undo tablespace.
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多项选择题InyourOracle10gdatabase，youhavescheduledajobtoupdatetheoptimizerstatisticsat05：00pmeveryFriday.Thejobhassuccessfullycompleted.Whichthreepiecesofinformationwouldyouchecktoconfirmthatthestatisticshavebeencollected？（）

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多项选择题The following are the details of your database： Instance name：test Host name：tech1.us.oracle.com IP address：145.33.230.186 Enterprise Manager Console HTTP Port number：5500 You started the database instance and you want to manage your database remotely with Enterprise Manager through a Web browser. Which two URLs would you use to access the Database Control？（）

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E.size the SYSTEM tablespace appropriately
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