多选题You are the Database Administrator （DBA） of your company. You execute the following statement on an Oracle 10g instance： SQL ALTER SYSTEM SWITCH LOGFILE； Which two tasks are performed when the statement is executed？ （）AThe DBWn process writes to the datafile.BChanges in the background process are recorded.CThe log file is updated with the current SCN number.DThe System Change Number （SCN） is recorded in the control file.EThe changes to the listener configuration in the listener.ora file are recorded.
多选题
You are the Database Administrator （DBA） of your company. You execute the following statement on an Oracle 10g instance： SQL> ALTER SYSTEM SWITCH LOGFILE； Which two tasks are performed when the statement is executed？ （）
A
The DBWn process writes to the datafile.
B
Changes in the background process are recorded.
C
The log file is updated with the current SCN number.
D
The System Change Number （SCN） is recorded in the control file.
E
The changes to the listener configuration in the listener.ora file are recorded.
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