多选题You have a database with the following tablespaces： SYSTEM， SYSAUX， UNDO， USERS， TEMP. You want to"roll back" the data in the USERS tablespace to the way it looked yesterday.  Which tablespaces do you need to perform a point-in-time restore operation o

第1题：

Your database instance is running with full workload after database creation. You have decided to use a fixed-size undo tablespace. You want to use the Undo Advisor to estimate the capacity of the undo tablespace. Which two factors must you consider before using the Undo Advisor to estimate the capacity of the undotablespace（）

• A、The retention period to support flashback
• B、The expected length of the longest-running query
• C、The number of undo tablespaces in the database
• D、The size of the Flash Recovery Area for the database instance

第2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3题：

Your database instance is running with full workload after database creation. You have decided to useafixed-sizeundo tablespace. You want to use the Undo Advisor to estimate the capacity of the undotablespace.  Which two factors must you consider before using the Undo Advisor to estimate the capacity of the undotablespace（）

• A、the retention period to support flashback
• B、the expected length of the longest-running query
• C、the number of undo tablespaces in the database
• D、the size of the Flash Recovery Area for the database instance

第4题：

Your database contains a temporary tablespace， index tablespace， undo tablespace， and a read-only tablespace apart from the SYSTEM and SYSAUX tablespaces. If a media failure occurs resulting in the loss of any of these tablespaces， which tablespace is NOT required for the database to start？（）

• A、 undo tablespace
• B、 index tablespace
• C、 read-only tablespace
• D、 temporary tablespace

第5题：

Which of the following restrictions are not true with respect to tablespace point-in-time recovery？（）

• A、 The target database must be in NOARCHIVELOG mode.
• B、 No backup is required of the database before you perform a TSPITR.
• C、 You must have all archived redo logs generated since the last backup up to the point to which you want to restore the transport set.
• D、 If you rename a tablespace， you can not perform a TSPITR to any point in time before that rename operation occurred.
• E、 If you have tables in tablespace_1 that have associated constraints in tablespace_2，then you must transport both tablespaces.

第6题：

You have a database with the following tablespaces： SYSTEM， SYSAUX， UNDO， USERS， TEMP. You want to"roll back" the data in the USERS tablespace to the way it looked yesterday.  Which tablespaces do you need to perform a point-in-time restore operation on in order to complete this task？（） 

• A、 SYSTEM
• B、 SYSAUX
• C、 UNDO
• D、 USERS
• E、 TEMP
• F、 This restore is not possible

第7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8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 te minate 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9题：

In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog and restored the control file by using the following command： RMAN> RESTORE CONTROLFILE;  Which two operations do you need to perform after restoring the control file from backup？（）

• A、shut down and restart the instance
• B、add new tempfiles to the temporary tablespaces after recovery
• C、perform a media recovery and open the database with the RESETLOGS option
• D、perform a media recovery and bring the database to NOARCHIVELOG mode

第10题：

Which tablespaces are mandatory in an Oracle database for it to be operational（）

• A、Undo tablespace
• B、USERS tablespace
• C、SYSAUX tablespace
• D、SYSTEM tablespace
• E、Temporary tablespace