单项选择题
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.
相关考题
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单项选择题
YoulostthePRODSTDtablespace，whichwasread-only.Thetablespacewasread-onlywhenthelastbackupwastaken.Howwouldyourecoverthetablespace？（）
A. restore the tablespace from the backup， and then perform an incomplete recovery
B. restore the tablespace from the backup， and then apply all the redo information
C. restore all the data files in the database， and then perform an incomplete recovery
D. restore the tablespace from the backup -
多项选择题
WhichtwostatementsregardingcompressedbackupsinRecoveryManager（RMAN）aretrue？（）
A. Backup compression is disabled by default.
B. Backup compression can be used with both backup sets and image copies.
C. Backup compression cannot be enabled using the CONFIGURE command.
D. Backup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher.
E. Backup compression applies to only backup sets.
F. Backup compression applies to only image copies. -
多项选择题
Exhibit： View the Exhibit and examine the properties of the USERS tablespace. You execute the following statement to shrink the TRANS table existing on the USERS tablespace： SQL> ALTER TABLE trans SHRINK SPACE CASCADE； Which objects would be affected by this command？（）
A. the materialized views based on the TRANS table
B. the materialized views log of the TRANS table
C. the TRANS table
D. the B*Tree indexes on the TRANS table
E. the large object （LOB） segments of the TRANS table
