You are maintaining an OLTP database in Oracle10g. You set the value of the LOG_ARCHIVE_TRACE parameter to zero. What is the impact of this setting？ （） 

单项选择题YouaremaintaininganOLTPdatabaseinOracle10g.Youfindthatthedatabaseisgeneratingalargenumberoftracefiles.YoudecidetodisablethetracefilesgeneratedbytheARCnbackgroundprocess.WhichactionwillenableyoutodisablethetracefilesgeneratedbytheARCnbackgroundprocess？（）

A. Remove the LOG_ARCHIVE_DEST parameter from the init.ora file.
B. Set the value of the SQL_TRACE parameter to FALSE in the init.ora file.
C. Use the DBMS_MONITOR.SESSION_TRACE_DISABLE procedure.
D. Set the value of the LOG_ARCHIVE_TRACE initialization parameter to zero.

单项选择题You have created a locally managed tablespace by issuing the following command：        CREATE TABLESPACE data1   DATAFILE ’data1_file1.dbf’ SIZE 10M AUTOEXTEND ON MAXSIZE        UNLIMITED；   For the DATA1 tablespace， you have set the warning level alert limit to 70 percent.  In which situation will a warning level alert be generated？（）

A. when 700 KB is used
B. when 700 KB is left as free space
C. when 7MB is used
D. when 7MB is left as free space
E. no alert will be generated because an autoextensible datafile is included in the tablespace

单项选择题Matthew has recently joined NetFx Corporation as a junior-level Database Administrator （DBA）. He is asked by his supervisor to verify the database for data block corruptions. He uses the DBVERIFY utility and finds that two data blocks are corrupted in the database.   What should Matthew use to identify the corrupted blocks as well as datafiles containing these blocks？（）

A. datafile
B. alert log
C. dynamic views
D. control file script

单项选择题Whileperformingmonitoringandtuningthedatabase，youwanttoviewthesummarizedinformationaboutthewarninglevelalertsandcriticallevelalerts.WhichsectionoftheOracleEnterprisemanagerdisplaysthesummarizedinformationaboutthewarningandcriticallevelalerts？（）

A.General
B. High Availability
C. Space Usage
D. Diagnostic Summary

单项选择题Youpreviouslysecuredyourlistenerwithanencryptedpassword.However，youneedtosetanewpasswordforsecurityreasons.WhatisthecorrectmethodforsettinganewencryptedpasswordforthelistenerusingtheListenerControlutility？（）

A. executing the SET PASSWORD command and then the SAVE_CONFIG command
B. executing the CHANGE_PASSWORD command and then the SAVE_CONFIG command
C. executing the CHANGE_PASSWORD command and then the SET PASSWORD command
D. executing the SET PASSWORD command， then the CHANGE_PASSWORD command and finally， the  SAVE_CONFIG command