单项选择题
A. Recover the online redo log from backup.
B. Delete and re-create the log file.
C. Use the alter database clear logfile command to clear the log file.
D. Shut down the database and restart it.
E. Shut down the database and then mount it. Clear the log file with the alter database clear logfile command and then restart the database with alter database open resetlogs.
单项选择题 Whenyoucreateabackupcontrolfile，whereistheresultingfilewrittento？（）
单项选择题 WhichofthefollowingstatementsistruewhenthedatabaseisinARCHIVELOGmodeand tablespacesareinhotbackupmode？（）
单项选择题 You are peer reviewing a fellow DBAs backup plan for his NOARCHIVELOG mode database， as shown here： Put the tablespaces in backup mode. Back up the datafiles for all tablespaces. Take the tablespaces out of backup mode. Back up all archived redo logs. Your colleague asks for you to comment on his plan. Which response would be correct？（）