单选题Data file DF1 belongs to tablespace TS1.，and the database is in ARCHIVELOG mode. You did an incomplete recover in the following steps：   1. Take data file DF1 offline.  2. Copy a backup copy of DF1 into the current DF1 location.  3. Execute RECOVER DAT

第1题：

Your Supportcenter.cn database is in ARCHIVELOG mode. The data file that belongs to the SYSTEM tablespace has become corrupted. Up to what point can you recover the database？（）

• A、Until last commit
• B、Until the time you perform recovery
• C、Until the time the date file got corrupted
• D、Until the point where the last transaction begun
• E、You cannot recover the SYSTEMtablespaceand must re-create the database.

第2题：

There is a problem with one of the disks used for your database and your system administrator informs you that the disk needs to be replaced. The replacement disk will not be available until tomorrow.  There was only one data file on this disk； it belongs to the USERS tablespace in your PROD database. Your PROD database runs in ARCHIVELOG mode and nightly online backups are taken. The users need to be able to access the data in the USERS tablespace before the replacement disk arrives. You have already taken the USERS tablespace offline and have restored the data file from last night’s backup to a new disk. Which additional steps are required in order to make the USERS tablespace available？（）

• A、Only bring the tablespace back online.
• B、Only recover the tablespace and then bring the tablespace back online.
• C、Shut down the database， recover the data file and then start up the database.
• D、Issue the ALTER DATABASE RENAME FILE command， recover the tablespace， and then bring the tablespace online.
• E、Recover the tablespace， issue the ALTER DATABASE RENAME FILE command， and then bring the tablespace online.

第3题：

You lost a temporary file that belongs to the default temporary tablespace in your database. From the options provided， which approach would you take to solve the problem？ （）

• A、flash back the database
• B、import the temporary tablespace from the last export
• C、restore all the data files and temporary files from the last full database backup and perform a recovery
• D、not perform a recovery， but create a new temporary tablespace， make it the default temporary tablespace and then drop the old tablespace

第4题：

第5题：

To accomplish user-managed backup for the USERS tablespace, you issued the following command to put the database in backup mode: SQL> ALTER TABLESPACE users BEGIN BACKUP; While copying the file to the backup destination a power outage caused the instance to terminate abnormally. Which statement is true about the next database startup and the USERS tablespace?（）

• A、The database will open, and the tablespace automatically comes out of the backup mode
• B、The database will be mounted, and recovery must be performed on the USERS tablespace.
• C、The database will be mounted, and data files in the USERS tablespace must be taken out of the backup mode.
• D、The database will not be mounted, and you must restore all the data files for the USERS tablespace from the backup, and perform recovery.

第6题：

View this parameter setting in your database：   DB_CREATE_FILE_DEST=’D:// /oracle/product/10.2.0/oradata/oracle’  You created a tablespace by using this command：   CREATE TABLESPACE USERS；  Which two statements are true about the USERS tablespace？（）

• A、The tablespace has two data files.
• B、An error is reported and tablespace creation fails.
• C、Data files are created with names generated by the instance.
• D、The tablespace can be extended without specifying the data file.
• E、Data files belonging to the USERS tablespace cannot be renamed.

第7题：

The loss of the control file forced you to re-create the control file. After re-creating it and opening the database， you find that some of the data files are named as MISSINGnnnnn， where nnnnn is a five-digit number starting with 0. What could be the possible reason？（）

• A、 These are the data files that are corrupted.
• B、 There is no SYSAUX tablespace in your database
• C、 There is a read-only tablespace in your database.
• D、 These are the data files that cannot be recovered.

第8题：

Your database is running In ARCIIIVELOG mode. One of the data files， USBRDATAOI. DBF， in the users tablespace is damaged and you need to recover the file until the point of failure. The backup for the data file is available.  Which three files would be used in the user-managed recovery process performed by the database administrator （DBA）？（） 

• A、 redo logs
• B、 control file
• C、 temporary files of temporary tablespace
• D、 the latest backup of only the damaged data file
• E、 the latest backup of all the data files In the USERS tablespace

第9题：

第10题：