单选题As a result of a media failure, the current online redo log group is corrupted. The database crashes, as the current online group is inaccessible. Which type of incomplete recovery are you most likely to perform? ()ACancel-basedBRecovery using a backup control fileCTime-basedDChange-based

单选题
As a result of a media failure, the current online redo log group is corrupted. The database crashes, as the current online group is inaccessible. Which type of incomplete recovery are you most likely to perform? ()
A

Cancel-based

B

Recovery using a backup control file

C

Time-based

D

Change-based


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Your database is in ARCHIVELOG mode. You have two online redo log groups, each of which contains oneredo member. When you attempt to start the database, you receive the following errors:ORA-00313: open failed for members of log group 1 of thread 1ORA-00312: online log 1 thread 1: ‘D:\REDO01.LOG‘You discover that the online redo log file of the current redo group is corrupted.Which statement should you use to resolve this issue?()A. ALTER DATABASE DROP LOGFILE GROUP 1;B. ALTER DATABASE CLEAR LOGFILE GROUP 1;C. ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1;D. ALTER DATABASE DROP LOGFILE MEMBER ‘D:\REDO01.LOG

The instance abnormally terminates because of a power outage.  Which statement is true about redo log filesduring instance recovery()A、Inactive and current redo log files are required to accomplish recovery.B、Online and archived redo log files are required to accomplish instance recovery.C、All redo log entries after the last checkpoint are applied from redo log files to data files.D、All redo log entries recorded in the current redo log file until the checkpoint position are applied to data files

以下()进程负责将Redo Log buffer里的数据写入Online redo log files。A、CKPTB、ARCnC、LGWRD、DBWn

You have recovered your Oracle Database 10g by using the control file backup because all copies of the current control file have been lost due to a media failure. You open your database by using the following statement:       SQLALTER DATABASE OPEN RESETLOGS;   Which of the following options is true about using the RESETLOGS option?()A、 The log sequence is reset to 0.B、 All the online redo logs are deleted.C、 All the archived redo logs from a previous incarnation become useless.D、 The full database backup taken from a previous incarnation can be used in future.E、 Only the control file and online redo log files are updated with a new RESETLOGS SCN and time stamp.

A media failure has occurred. This has resulted in all the members of the next hop log group being rendered inaccessible to the log writer process (LGWR) at a log switch. How does this failure affect the operational database?()A、 The database re-created the missing redo log files automatically.B、 The database continues to function normally with the existing files.C、 The database allows only queries, no other statements are allowed.D、 The database returns and error and the database instance shuts down.E、 The user sessions that generate redo logs are terminated automatically.

Because of a power outage, instance failure has occurred. From what point in the redo log does recovery begin and where does it end?()A、current redo log and inactive redo logB、checkpoint position to end of redo logC、beginning of redo log to end of redo logD、all redo logs before the point of last commitE、beginning of redo log to checkpoint position

Because of hardware failure, you decided to drop a redo log member from the database. Which condition should be met to drop a redo log file?()A、 The redo log file should belong to an active group.B、 The redo log file should belong to an inactive group.C、 The redo log file should belong to the current group.D、 The redo log file can be dropped only if all the transactions are stopped.E、 Before a redo log file is dropped, it should be deleted from the operating system (OS).

The instance abnormally terminates because of a power outage. Which statement is true about redolog files during instance recovery()A、Inactive and current redo log files are required to accomplish recovery.B、Online and archived redo log files are required to accomplish instance recovery.C、All redo log entries after the last checkpoint are applied from redo log files to data files.D、All redo log entries recorded in the current redo log file until the checkpoint position are applied to datafiles.

As a result of a media failure, the current online redo log group is corrupted. The database crashes, as the current online group is inaccessible. Which type of incomplete recovery are you most likely to perform? ()A、Cancel-basedB、Recovery using a backup control fileC、Time-basedD、Change-based

In your database, online redo log files are multiplexed and one of the members in a group is lost due to media failure.  How would you recover the lost redo log member?()A、import the database from the last exportB、restore all the members in the group from the last backupC、drop the lost member from the database, and then add a new member to the groupD、restore all the database files from the backup, and then perform a complete recovery E、restore all the database files from the backup, and then perform an incomplete recovery

The online redo log group configuration for your database is as follows: What will happen if the online redo log file ’ora02/oradata/redo02b.log’is corrupted while working on the database?() A、 The database will hang.B、 The database will be crashed.C、 The database will be shut down.D、 The LGWR process writes redo log entries to the other redo log member of the Group2 group

Your database is in ARCHIVELOG mode. You have two online redo log groups each of which contains one redo member. When you attempt to start the database, you receive the following errors:   ORA-00313: open failed for members of log group 1 of thread 1   ORA-00312: online log 1 thread 1: ’D:///REDO01.LOG’   You discover that the online redo log file of the current redo group is corrupted.  Which statement should you use to resolve this issue?()A、 SQLALTER DATABASE DROP LOGFILE GROUP 1;B、 SQLALTER DATABASE CLEAR LOGFILE GROUP 1;C、 SQLALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1;D、 SQLALTER DATABASE DROP LOGFILE MEMBER ’D:///REDO01.LOG’;

View the Exhibit.You executed the following command to perform a backup of the USERS tablespace: RMAN BACKUP TABLESPACE USERS;  Which three types of files are backed up? ()A、 all the data files belonging to the USERS tablespaceB、 password fileC、 online redo log filesD、 the current control fileE、 archived redo log filesF、 the current server parameter fileG、 data files belonging to the USERS tablespace and all the default tablespaces

单选题Which of the following dynamic view would you query to identify the online CURRENT redo log group?()AV$LOGBV$LOFHISTCV$LOGFILEDV$LOG_HISTORY

单选题The online redo log group configuration for your database is as follows: What will happen if the online redo log file ’ora02/oradata/redo02b.log’is corrupted while working on the database?()A The database will hang.B The database will be crashed.C The database will be shut down.D The LGWR process writes redo log entries to the other redo log member of the Group2 group

单选题Your database is in NOARCHIVELOG mode. The database has three online redo log groups, and each group contains three online redo log members. The online redo log members are stored across three hard disks, E, F, and G, respectively. Hard disk G crashed while the LGWR background process was writing redo information to the online redo log files. What effect will this crash have on the database?()A The database will operate normally without generating any redo.B The database will hang, and you must shut down and restart the instance.C The database will crash, and you must recover the database from the point of failure.D The database will operate normally and will generate minimal redo for the tables created with the NOLOGGING clause.

单选题A database is running In ARCHIVBXXMS mode. It has two online redo log groups and each group has one member.  A LGWR Input/output (I/O) fells due to permanent media failure that has resulted In the loss of redo log file and the LWGR terminates causing the instance to crash. The steps to recover from the loss of a current redo log group member in the random order are as follow.   1) Restore the corrupted redo log group. 2) Restore from a whole database backup.  3) Perform incomplete recovery.  4) Relocate by renaming the member of the damaged online redo log group to a new location.  5) Open the database with the RESETLOGS option.  6) Restart the database instance.  7) Issue a checkpoint and clear the log.   Identify the option with the correct sequential steps to accomplish the task efficiently().A 1,3,4,and 5B 7,3,4. and 5C 2,3,4,and 5D 7,4,3,and 5E Only 6 is required

单选题Which components are needed for successful and most efficient recovery.()A The backup RB3 and the current online redo log filesB the backup RB2 and the archived redo log files after the log sequence number 15622C Backup R81 and the archived redo log hies after the log sequence number 12871D The backup RB3 and the archived redo log files after the log sequence number 16721

单选题Your database is in ARCHIVELOG mode. You have two online redo log groups, each of which contains one redo member. When you attempt to start the database, you receive the following errors: ORA-00313: open failed for members of log group 1 of thread 1 ORA-00312: online log 1 thread 1: 'D:/REDO01.LOG' You discover that the online redo log file of the current redo group is corrupted. Which statement should you use to resolve this issue?()AALTER DATABASE DROP LOGFILE GROUP 1;BALTER DATABASE CLEAR LOGFILE GROUP 1;CALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1;DALTER DATABASE DROP LOGFILE MEMBER 'D:/REDO01.LOG

单选题Because of hardware failure, you decided to drop a redo log member from the database. Which condition should be met to drop a redo log file?()A The redo log file should belong to an active group.B The redo log file should belong to an inactive group.C The redo log file should belong to the current group.D The redo log file can be dropped only if all the transactions are stopped.E Before a redo log file is dropped, it should be deleted from the operating system (OS).

单选题You have recovered your Oracle Database 10g by using the control file backup because all copies of the current control file have been lost due to a media failure. You open your database by using the following statement:       SQLALTER DATABASE OPEN RESETLOGS;   Which of the following options is true about using the RESETLOGS option?()A The log sequence is reset to 0.B All the online redo logs are deleted.C All the archived redo logs from a previous incarnation become useless.D The full database backup taken from a previous incarnation can be used in future.E Only the control file and online redo log files are updated with a new RESETLOGS SCN and time stamp.

单选题The instance abnormally terminates because of a power outage.  Which statement is true about redo log filesduring instance recovery()AInactive and current redo log files are required to accomplish recovery.BOnline and archived redo log files are required to accomplish instance recovery.CAll redo log entries after the last checkpoint are applied from redo log files to data files.DAll redo log entries recorded in the current redo log file until the checkpoint position are applied to data files

单选题The performance of your database is affected by the presence of two log members in each online redo log group and the placement of redo log members of a group on the same disk. You decide to place the redo log members of a group on separate disks. Which view will you query to find the name and location of all the online redo log members?()A V$LOGB V$LOGFILEC DBA_LOG_GROUPSD V$LOG_HISTORY

单选题The instance abnormally terminates because of a power outage. Which statement is true about redolog files during instance recovery()AInactive and current redo log files are required to accomplish recovery.BOnline and archived redo log files are required to accomplish instance recovery.CAll redo log entries after the last checkpoint are applied from redo log files to data files.DAll redo log entries recorded in the current redo log file until the checkpoint position are applied to datafiles.

单选题Because of a power outage, instance failure has occurred. From what point in the redo log does recovery begin and where does it end? ()Acurrent redo log and inactive redo logBcheckpoint position to end of redo logCbeginning of redo log to end of redo logDall redo logs before the point of last commitEbeginning of redo log to checkpoint position

单选题In your database, online redo log files are multiplexed and one of the members in a group is lost due to media failure? How would you recover the lost redo log member?()A import the database from the last exportB restore all the members in the group from the last backupC drop the lost member from the database and then add a new member to the groupD restore all the database files from the backup and then perform a complete recoveryE restore all the database files from the backup and then perform an incomplete recovery

单选题Your database is in ARCHIVELOG mode. You have two online redo log groups each of which contains one redo member. When you attempt to start the database, you receive the following errors:   ORA-00313: open failed for members of log group 1 of thread 1   ORA-00312: online log 1 thread 1: ’D:///REDO01.LOG’   You discover that the online redo log file of the current redo group is corrupted.  Which statement should you use to resolve this issue?()A SQLALTER DATABASE DROP LOGFILE GROUP 1;B SQLALTER DATABASE CLEAR LOGFILE GROUP 1;C SQLALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1;D SQLALTER DATABASE DROP LOGFILE MEMBER ’D:///REDO01.LOG’;