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单选题
You were recently hired by Certkiller .com as a database administrator. You are asked to find out whether the currently functional listener process， named L1， has been password protected or not. You are not familiar with the file system of the new organization. How would you accomplish the task？（）
A
by using the STATUS command of the Listener control utility
B
by using the STATUS L1 command of the Listener control utility
C
by using the SHOW RULES command of the Listener control utility
D
by using the SET PASSWORD command of the Listener control utility
E
by searching for the PASSWORD_LISTENER entry in the listener.ora file
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Configure Java Pool to cache the java objects.B
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Control fileB
Password fileC
Parameter fileD
Online redo log fileE
Listener controller fileF
Server parameter file
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多选题You work as a database administrator for Certkiller .com. Your listener process， L1，is currently listening to three databases：CertK INDB04，Certkiller DB05 and Certkiller DB06. Using Database Configuration Assistant （DBCA） you create one more database，Certkiller DB07，and enable dynamic registration. Which two commands of Listener Control Utility （lsnrct1） would you use to determine whether the dynamic registration occurred for the database， Certkiller DB07， with the L1 listener process？（）ASHOW L1BSPAWN L1CSTATUS L1DSERVICES L1ESTATUS LISTENERFSERVICES LISTENERGSHOWcurrent_listener
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单选题You work as a database administrator for Certkiller .com. Your database is in NOARCHIVELOG mode and you want to perform a backup. Which type of backup would be appropriate in this case？ （）A
Hot backupB
Online backupC
consistent backupD
incremental backupE
inconsistent backup
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AB
BC
CD
D
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