单项选择题 YoudefineanalerttoberaisedwhentheUSERStablespaceusagehasreached80%ofthetotalspace.Whichareawouldyoureferto，inordertoconfirmthatthealerthasbeenraisedduetheevent？（）

单项选择题 Exhibit： You are working on a database created with the Oracle Database 10g software in which the initialization parameter COMPATIBLE is set to 10.0.0. The hr_tbs tablespace in the database is created as follows：  CREATE TABLESPACE hr_tbs DATAFILE ’/oracle/oradata/hr_tbs.dbf’ SIZE 50M； View the Exhibit to see the properties of the database. Which statement is correct in this scenario？（）

单项选择题 You have been recently hired as a database administrator. Your senior manager asks you to study the production database server and submit a report on the settings done by the previous DB  A. While observing the server settings， you find that the  following parameter has been set in the parameter file of the database： REMOTE_OS_AUTHENT = TRUE  What could have been the reason to set this parameter as TRUE？（）