单项选择题

You are analyzing the components of the redo log mechanisms in your Oracle database. Which of the following purposes does the CKPT process serve?（）

A.Writes buffers to disk
B.Writes current redo log number to datafile headers
C.Writes redo log information to disk
D.Reads information into memory for users

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热门试题

单项选择题TheDBAisdefiningroleforusers.Whichofthefollowingisnotanacceptablemethodfordefiningadefaultrole?（）

A.ALTER USER DEFAULT ROLE ALL
B.ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1
C.ALTER USER DEFAULT ROLE NONE
D.ALTER USER DEFAULT ROLE NONE EXCEPT ROLE_1

单项选择题YouaredefiningareasonyourOracledatabase.Whichofthefollowingprofileareascanbeusedtocontroltheresourceusagefortheotherfour?（）

A.LOGICAL_READS_PER_SESSION
B.CONNECT_TIME
C.COMPOSITE_LIMIT
D.CPU_PER_SESSION
E.PRIVATE_SGA

单项选择题Inasituationwherenomultiplexingofredologstakesplace,whathappenswhenOraclecannotreaddatafromtheonlineredologgroupforarchiving?（）

A.Nothing happens
B.Oracle will automatically switch redo logs when detected
C.Oracle eventually won't allow new records to be added to the database
D.The instance crashes

单项选择题YouareanalyzinghowOracleprocessesuserstatements.SQLandPL SQLparseinformationisstoredinwhichofthefollowingdatabasememoryareas?（）

A.Library cache
B.Row cache
C.Dictionary cache
D.Large area
E.Buffer cache

单项选择题Youaredesigningthephysicaldatabaselayoutonyourhostmachine.WhatistherelationshipbetweentablespacesanddatafilesintheOracledatabase?（）

A.One tablespace has only one datafile
B.Many tablespaces can share one datafile
C.One tablespace can have many datafiles
D.One datafile can contain many tablespaces