多项选择题

Your database is functioning in ARCHIVELOG mode. In which two situations would you perform a cancelbased recovery？（）

A.You find that one of the redo log members in each redo log group is lost.
B.You find that a data file that belongs to the USERS tablespace is damaged.
C.You find that a data file that belongs to the SYSTEM tablespace is damaged.
D.You find that the current redo log group is damaged and is not available for recovery.
E.You realized while performing a recovery that an archived redo log file needed for recovery is lost.

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单项选择题

You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and usermanaged consistent backups are performed every Sunday night. On Thursday morning， you find that an important table has been dropped and purged.
With reference to this scenario， up to what point in time can the data be recovered？（）

A.until Thursday morning
B.until last Sunday’s backup
C.until Wednesday evening
D.until that point in time when the database is opened
E.until that point in time when the recovery is performed
F.until that point in time when the table is dropped and purged

单项选择题

Your database operates in ARCHIVELOG mode and usermanaged consistent backups are performed every Sunday night. On Tuesday， at 9：00 a.m. the current log sequence number was 369. Also， on Tuesday you lost the data file belonging to the SYSTEM tablespace and an archivelog file （sequence number 356） that contained redo entries between 8：00 a.m. and 8：30 a.m. With reference to this scenario， what would you do to recover the database？（）

A.restore all the data files from last Sunday’s backup， and then perform a timebased recovery
B.restore all the data files from last Sunday’s backup， and then perform a cancelbased recovery
C.restore all the data files from last Sunday’s backup， and then perform a changebased recovery
D.restore only data files that belong to the SYSTEM tablespace from last Sunday’s backup， and then perform a complete recovery

单项选择题

Your database operates in ARCHIVELOG mode. Usermanaged consistent backups are performed every Sunday night.
On Tuesday， client A drops a table at 8：00 a.m. as follows：
SQL> DROP TABLE cust_ord PURGE;
Table dropped.
Client B executes a query at 9：00 a.m. on the same table as follows：
SQL> SELECT * FROM cust_ord;
SELECT * FROM cust_ord
*
ERROR at line 1：
ORA00942： table or view does not exist
Client B needs the dropped table and reports the problem to you. With reference to this scenario， which action should you take？（）

A.retrieve the table by using the flashback feature
B.restore all the data files from last Sunday’s backup， and then perform a timebased recovery
C.restore all the data files from last Sunday’s backup， and then perform a log sequence recovery
D.restore all the data files from last Sunday’s backup， and then perform a cancelbased recovery
E.restore from last Sunday’s backup only data files that belong to the tablespace in which the table was stored， and then perform a complete recovery

Your database is functioning in ARCHIVELOG mode. In which two situations would you perform a cancel­based recovery？（）

相关考题

Your database is functioning in ARCHIVELOG mode. In which two situations would you perform a cancelbased recovery？（）