1.One of your databases has archive logging enabled and RMAN backups are taken at regular intervals. The data file for the users tablespace is corrupt. Which command must you execute before starting the recovery of this tablespace ? A) SWITCH DATAFIL…

9.You ran this command on a source database: $> expdp hr/hr DIRECTORY=dumpdir DUMPFILE=empl.dmp VIEWS_AS_TABLES=emp_dept On the target database, you run this command: impdp hr/hr DIRECTORY=dumpdir DUMPFILE=empl.dmp VIEWS_AS_TABLES=emp_dept Which two…

Oracle 12C -- top-n查询新特性在12C中,增加了一些新的特性.可以指定返回结果集的指定数量的行.或按照百分比返回行. SQL> select count(*) from emp; COUNT(*) ---------- SQL> select empno,hiredate from emp order by hiredate; EMPNO HIREDATE ---------- --------- -DEC- -FEB- -FEB- -APR- -MAY- -JUN- -SE…

choose two You plan to upgrade your Oracle Database 9i to Oracle Database 12c. Which two methods can you use? A) Perform a direct upgrade by manually running the catctl.pl and catupgrd.sql scripts before issuing the STARTUPUPGRADE command. B) Upgrade…

choose one Which users are created and can be used for database and host management of your DBaaS database servers? A) cloud and oracle users B) root, oracle and cloud users C) root and oracle users D) opc and oracle users E) root, opc and oracle use…

choose one In your Oracle 12c database, you plan to execute the command: SQL> CREATE TABLESPACE tbsl DATAFILE '/u02/oracle/data/tbs0l.dbf' SIZE 50M; The u02 file system has 1 GB of free space available. What is the outcome? A) It raises an error beca…

choose three Which three statements are true about Oracle checkpoint processing? A) Incremental checkpoints write some dirty buffers to the datafiles and unwritten redo to the online redo logs. B) Frequent thread checkpoints can degrade database perf…

choose one What is a pre-requisite to alter a role? A) You should set the OS_ROLES parameter to true. B) You should be granted the DBA role. C) You should be granted the role with the GRANT OPTION. D) You should have the ALTER ANY ROLE system privile…

12. Your database is configured in archivelog mode. Examine the RMAN configuration parameters: CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default CONFIGURE BACKUP OPTIMIZATION OFF; # default CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default CONFIGUR…

6.Which four statements are true about database instance behavior? A) Redo log files can be renamed in mount state. B) Datafiles can be renamed in mount state. C) All dynamic performance views (v$ views) return data when queried from a session connec…