单项选择题
A.import the database from the last export
B.restore all the members in the group from the last backup
C.drop the lost member from the database， and then add a new member to the group
D.restore all the database files from the backup， and then perform a complete recovery
E.restore all the database files from the backup， and then perform an incomplete recovery
单项选择题 A user executes a query on the EMP table， which contains thousands of rows， to get details about employees in one of the departments. The user receives the following error： SQL> SELECT ename FROM emp WHERE deptno=10 ORDER BY sal SELECT ename FROM emp WHERE deptno=10 ORDER BY sal * ERROR at line 1： ORA01157： cannot identify/lock data file 201 see DBWR trace file ORA01110： data file 201： ’/u01/app/oracle/oradata/orcl/temp01.dbf’ What is a possible reason？（）
多项选择题 Lastnight，amediafailurecausedthelossofatemporaryfilethatbelongstoyourdatabase.Whichtwothingsmayhappenthismorningwhenyoutrytoopenyourdatabase？（）
单项选择题 Whilesettingupthethresholdsfortablespacespaceusagemetricsforoneofyourtablespaces，youdefinethecriticalthresholdas60%andwarningthresholdas75%.Whatwouldbetheresultofthissetting？（）