单选题Which of the following shut down options should not be used before performing a consistent whole database backup？（）A NORMALB TRANSACTIONALC ABORTD IMMEDIATEE INCONSISTENT

第1题：

Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERS tablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten sincethe last backup.  What would you do to recover the data file（）

• A、Take the USERS tablespace offline and re-create the lost data file.
• B、Shut down the instance， restore the data file from the last consistent backup， and restart the databaseinstance.
• C、Shut down the instance， restore all the database files from the last consistent backup， and restart thedatabase instance.
• D、Take the USERS tablespace offline， restore all the data files of the USERS tablespace from the lastconsistent backup， and make the tablespace online

第2题：

The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each. One of 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

第3题：

第4题：

You work as a database administrator for Certkiller .com. Your database is in NOARCHIVELOG mode and you want to perform a backup. Which type of backup would be appropriate in this case？ （）

• A、Hot backup
• B、Online backup
• C、consistent backup
• D、incremental backup
• E、inconsistent backup

第5题：

Management has decided that the database must be available 24 hours a day， 7 days a week. Given this requirement， which type of backup is required？（）

• A、user-managed backups.
• B、partial database backups.
• C、consistent database backups.
• D、inconsistent database backups.

第6题：

You are working on the PROD database， which is in NOARCHIVELOG mode. You lost the active online redo log group due to a media failure. How should you recover your database？（）

• A、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， open the database with the RESETLOGS option after performing a cancel-based recovery.
• B、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， drop the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
• C、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， clear the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
• D、 Do nothing. You do not need to recover the database in this case； an instance recovery will be performed by the SMON process on startup.

第7题：

Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you.  Which two statements are true in this scenario？（）

• A、The instance aborts.
• B、The database cannot be recovered.
• C、The database can be recovered by restoring the control files from the backup.
• D、The database remains opened and you have to shut it down with the ABORT option.
• E、The database can be restored till the point of the last closed whole database backup.

第8题：

第9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10题：

Your database is running in NOARCHIVELOG mode with two online redo log files. The SALES table contains sales information for the organization. The SALES table belongs to the SALESTB tablespace.  On Monday， you insert 10 rows into the SALES table. The current log sequence number is 14. You change the tablespace status from READ WRITE to READ ONLY for the SALESTB tablespace. You shut down the database and take a backup of the SALESTB tablespace.   On Tuesday， you start the database. You change the status for the SALESTB tablespace from READ ONLY to READ WRITE. You insert 10 more rows into the SALES table and shut down the database. The current log sequence number is 15.   When you try to open the database on Wednesday morning， you discover that the SALESTB tablespace was lost because of a media failure. Which of the following options is true about recovering the SALES table？（）

• A、 The SALES table cannot be recovered because the database is running in NOARCHIVELOG mode.
• B、 The SALES table can be recovered by restoring the SALESTB tablespace from the backup and performing a media recovery.
• C、 The SALES table can be recovered by restoring the SALESTB tablespace from the backup without performing any media recovery.
• D、 The SALES table can be recovered by restoring the SALESTB tablespace from the backup， but the rows inserted on Tuesday need to be inserted again.