To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file? （）(Choose two.) Multiple change tracking files can be created for a database.。 The change tracking file must be created after the first level 0 backup.。 RMAN does not support backup and recovery of the change tracking file.。 The database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.。
驳岸
Your database is started by using the server parameter file （SPFILE）. You issued this command to change the value of the LOG_BUFFER initialization parameter： ALTER SYSTEM SET LOG_BUFFER=24M SCOPE=BOTH； What would be the outcome of this command？ （） The command would return an error because LOG_BUFFER is a static parameter.。 The parameter value would be changed and it would come into effect immediately.。 You need to restart the database so that parameter changes can come into effect.。 The command would succeed only if initialization parameter LOG_ARCHIVE_MAX_PROCESS is set to value 2.。
总监理工程师实行从业资质管理制度，监理工程师实行执业资格管理制度，监理员实行从业资格管理制度。
What is the name of the User Interface （UI） widget that is just a standard edit box that is linked to a calendar with the pop-up property set？（） Date-Time Picker。 Calendar Picker。 Date Picker。 Date Selector。
加速绝缘材料老化的主要原因是使用的（）。
