Exhibit：
You are working on a database created with the Oracle Database 10g software in which the initialization parameter COMPATIBLE is set to 10.0.0. The hr_tbs tablespace in the database is created as follows： 
CREATE TABLESPACE hr_tbs DATAFILE ’/oracle/oradata/hr_tbs.dbf’ SIZE 50M； View the Exhibit to see the properties of the database. Which statement is correct in this scenario？（）

单项选择题You have been recently hired as a database administrator. Your senior manager asks you to study the production database server and submit a report on the settings done by the previous DB  A. While observing the server settings， you find that the  following parameter has been set in the parameter file of the database： REMOTE_OS_AUTHENT = TRUE  What could have been the reason to set this parameter as TRUE？（）

A.to enable operating system authentication for a remote client
B.to restrict the scope of administration to identical operating systems
C.to allow the start up and shut down of the database from a remote client
D.to enable the administration of the operating system from a remote client
E.to disable the administration of the operating system from a remote client

单项选择题YouwanttoadministeryourPRODdatabasefromaremotehostmachineusingaWeb-enabledinterface.WhichOracletoolwouldyouusetoaccomplishthistaskefficientlywithoutusingcommand-lineinterfaces？（）

A.SQL*Plus
B.iSQL*Plus
C.Management Server
D.Management Repository
E.Oracle Enterprise Manager 10g Database Control

多项选择题Youareinthemiddleofatransactionandverycrucialdatahasbeenmodified.Becauseofahardwarefailure，theinstancehasshutdownbeforesynchronizingallthedatabasefiles.Whichtwostatementsaretrue？（）

A.On startup， SMON coordinates instance recovery.
B.On startup， CKPT coordinates instance recovery.
C.On startup， use RMAN to perform instance recovery.
D.Uncommitted changes will be rolled back after the database is opened.
E.On startup， perform media recovery and then instance recovery.
F.On startup， all the files will be synchronized and you get both committed and uncommitted data.

单项选择题Oneoftheusersessionswasterminatedabnormallyinthemiddleofatransaction.WhatdoesOracledatabasedotorecoverit？（）

A.uses undo data for roll forward
B.uses Flashback Log for recovery
C.uses online redo logs to roll back
D.uses undo data to roll back the transaction
E.uses Recovery Manager （RMAN） to roll back
F.uses the System Monitor （SMON） background process to perform instance recovery

单项选择题Initially， for the Automatic Workload Repository （AWR） statistics， the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database.  You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However， when you observe the Memory Advisor on a Friday， you find that the statistics are available only for two days， Thursday and Friday， of that week.  What would have caused the statistics to be removed？（）

A.On Wednesday， the statistics have been purged.
B.On Wednesday， the retention period has been set to zero.
C.On Wednesday， the collection interval has been set to zero.
D.On Wednesday， the collection level has been changed to All.
E.On Wednesday， the retention period has been set to one day.
F.On Wednesday， the retention period has been set to two days.
G.On Wednesday， the collection level has been changed to Typical.
H.On Wednesday， the collection interval has been set to 1440 minutes.