单选题You issued the following command at the UNIX environment：   % setenv ORA_SDTZ ’OZ_TZ’   What will be the impact of issuing the above command？（）AThe operating system local time zone will be set for a user session using the operating system environment v

第1题：

You performed the RMAN database backup having a backupset key number 231 with the KEEP FOREVER option. After some days, you want to change the status of the database backup and you issued the following command: RMAN>CHANGE BACKUPSET 231 NOKEEP; What is the implication of this command?（）

• A、The backup is deleted.
• B、The backup is marked unavailable.
• C、The backup overrides the backup retention policy.
• D、the backup becomes eligible for deletion according to the existing retention policy

第2题：

Which of the following options is true about shutting down an Automatic Storage Management （ASM） instance？（）  

• A、 If the SHUTDOWN IMMEDIATE command is issued to the ASM instance， the ASM instance immediately shuts down.
• B、 If the SHUTDOWN ABORT command is issued to the ASM instance， the ASM instance will shut down all the database instances and then shut down immediately.
• C、 If the SHUTDOWN NORMAL command is issued to the ASM instance， before shutting down， the ASM instance waits for the dependent database instances to shut down.
• D、 If the SHUTDOWN TRANSACTIONAL command is issued to the ASM instance， the ASM instance passes the same SHUTDOWN command to the dependent database instances， but does not wait for any active transactions to complete before it shuts down.

第3题：

第4题：

You issued the following statement：   SQL>ALTER DATABASE ENABLE RESUMABLE TIMEOUT n；   What will be the result of issuing the above statement？（）

• A、The command will not execute successfully because TIMEOUT is an invalid clause with the ALTER DATABASE ENABLE RESUMABLE command.
• B、 The command will not execute successfully because resumable space allocation is enabled at the session level.
• C、 The command will execute successfully and resumable space will be allocated at the session level.
• D、 The command will execute successfully and resumable space will be allocated at the instance level.

第5题：

You issued the following command to drop the PRODUCTS table: SQL> DROP TABLE products; What is the implication of this command?（）

• A、All data along with the table structure is deleted 
• B、The pending transaction in the session is committed 
• C、All indexes on the table will remain but they are invalidated 
• D、All views and synonyms will remain but they are invalidated 
• E、All data in the table are deleted but the table structure will remain

第6题：

You work as a database administrator for Supportcenter.cn. When you tried to connect to the database， you received the following error：   ERROR：   ORA-12541：TNS：no_listener   You found that the listener is not running on the server， so you issued the following command in the Listener Control utility to start the listener.   lsnrctl>START   What statement is true？（）

• A、It would attempt to start the default listener
• B、It would start the most recently created listener.
• C、It would display an error with a message asking for the listener name to be specified.
• D、It would show you a list of listeners and prompts for the listener name that you want to start.

第7题：

You just issued the following statement: ALTER TABLE SALES DROP COLUMN PROFIT. Which of the following choices identifies when the column will actually be removed from Oracle?（）

• A、Immediately following statement execution 
• B、After the ALTER TABLE DROP UNUSED COLUMNS command is issued 
• C、After the ALTER TABLE SET UNUSED COLUMN command is issued 
• D、After the ALTER TABLE MODIFY command is issued

第8题：

第9题：

You issued the following command to analyze the SCOTT.EMP table for block corruption：   ANALYZE TABLE SCOTT.EMP VALIDATE STRUCTURE；  You received the following error：   ORA-01578： ORACLE data block corrupted  （file # %s， block # %s）   How will you resolve the block corruption problem？（）

• A、 by using the DBMS_REPAIR package
• B、 by using the DB_BLOCK_CHECKING parameter
• C、 by using the DBVERIFY utility
• D、 will not be completely resolved until the hardware fault is corrected

第10题：

The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each. Oneof the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file:ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3; Which action should you perform immediately after using this command?（）

• A、You should perform a log switch
• B、You should make a backup of the database
• C、You should switch the database to the NONARCHIVELOG mode
• D、You should shut down the database instance and perform a complete database recovery