单选题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 backupB Online backupC consistent backupD incremental back

第1题：

You work as a database administrator for Certkiller .com. You are using Recovery Manager （RMAN） to perform backups in your databases.  Which four backup operations can be performed using RMAN？（）

• A、A backup of the target database when it is mounted
• B、A backup of online redo log files when the database is open
• C、A backup of only used data blocks in the file beingbeingbackup up
• D、A backup of online， read/write data files when the database is open
• E、A backup of only those data blocks that have changed since a previous backup
• F、A backup of online， read/write data files when the database is in the NOMOUNT state.

第2题：

You work as a database administrator for Certkiller .com. You want to configure database backups to be run automatically.  Which tool or utility would you use to achieve this？ （）

• A、The DBMS_JOB package
• B、The BACKUP_JOB package
• C、The DBMS_BACKUP_RESTORE package
• D、The calendar tool in the Operating System （OS）
• E、The backup scheduler in Enterprise Manager （EM）
• F、The DBMS_BACKUP_SCHEDULER packager inline mode

第3题：

You work as a database administrator for Certkiller .com. You received the following error while working on your database： ORA-01555： snapshot too old  In which situation would you receive such an error？（）

• A、You performed rollback after commit.
• B、If a log switch occurs in your database.
• C、Thearchiverfails to generate an archived log file.
• D、Instance recovery fails to find one of the redo log files.
• E、A long-running query is unable to get read-consistent image.
• F、If you perform manual undo management operations in auto mode.

第4题：

Your database is in NOARCHIVELOG mode. You start to do a backup， but your users complain that they dont want you to shut down the database to perform the backup. What options are available to you？（）  

• A、 Put the database in hot backup mode and perform an online backup，including backing up the  archived redo logs.
• B、 Just back up the database datafiles without shutting down the database.
• C、 You will have to wait until you can shut down the database to perform the backup.
• D、 Mark each datafile as backup in progress， back them up individually，and then mark them as backup not in progress. No archived redo logs will need to be backed up.
• E、 Only back up the datafiles that the user will not be touching. Once the user has finished what they were doing，you can shut down the database and back up the datafiles the user changed during the  course of the remaining backup

第5题：

Your database is functioning in NOARCHIVELOG mode. Your database contains 15 tablespaces. You want to use Recovery Manager （RMAN） to perform backups. Which two backups would you be able to perform when the database is being accessed by users？（）

• A、 Backup of offline tablespaces.
• B、 Backup of read-only tablespaces.
• C、 Backup of system-critical tablespaces.
• D、 Backup of online， locally managed tablespaces.
• E、 Backup of read/write dictionary-managed tablespaces.

第6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7题：

Your test database is running in NOARCHIVELOG mode. Which statement is true regarding the type ofbackups that can be performed on the database（）

• A、You can perform online whole database backups.
• B、You can performofflinewhole database backups.
• C、You cannot perform schema-level export/import operations.
• D、You can perform the backup of only the SYSTEM tablespace when the database is open.

第8题：

You are working on a 24X7 database. You want to design a backup strategy for your database that uses user managed backups. You want to be able to perform all backups while the database remains online. Which statement about performing user-managed backups in a 24x7 environment is true?（）

• A、You must have change tracking enabled in your database
• B、Your database must be running in NOARCHIVELOG mode
• C、To back up a tablespace, it must be in backup mode
• D、To back up a tablespace, it must first be taken offline

第9题：

Your database is functioning in NOARCHIVELOG mode. Your database contains 15 tablespaces. You want to use Recovery Manager （RMAN） to perform backups.  Which two backups would you be able to perform when the database is being accessed by users？（）

• A、backup of offline tablespaces
• B、backup of read­only tablespaces
• C、backup of system­critical tablespaces
• D、backup of online， locally managed tablespaces
• E、backup of read/write dictionary­managed tablespaces

第10题：

You executed the following command in Recovery Manager （RMAN） to perform a backup of the DETTBS tablespace： RMAN> BACKUP TABLESPACE DETTBS；  Under which conditions would this command execute successfully？ （）

• A、 The database is in NOMOUNT state.
• B、 The database is in NOARCHIVELOG mode and the tablespace is online.
• C、 The database is in NOARCHIVELOG mode and the tablespace is offline.
• D、 The database is in ARCHIVELOG mode and the tablespace is offline.
• E、 The database is in ARCHIVELOG mode and the tablespace is online.