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In the parameter file of the production database， the BACKGROUND_DUMP_DEST parameter is set to $ORACLE_HOME/users. Which two types of files would you find in this location？（）
A:the alert log file
B:the core dump files
C:the change tracking file
D:the user session trace files
E:the database audit trail files
F:the background process trace files

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出自：Oracle认证

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