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In a situation where no multiplexing of redo logs takes place, what happens when Oracle cannot read data from the online redo log group for archiving?（）
- A、Nothing happens
- B、Oracle will automatically switch redo logs when detected
- C、Oracle eventually won't allow new records to be added to the database
- D、The instance crashes
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更多 “In a situation where no multiplexing of redo logs takes place, what happens when Oracle cannot read data from the online redo log group for archiving?（）A、Nothing happensB、Oracle will automatically switch redo logs when detected C、Oracle eventually won't allow new records to be added to the database D、The instance crashes” 相关考题
考题
You are using Oracle Database 10g. You performed an incomplete recovery of your database and opened the database with the RESETLOGS option. What is the effect of opening the database with the RESETLOGS option？（）A、This operation resets the SCN for the database.B、This operation creates a new incarnation of the database.C、This operation moves all the redo log files to a different location.D、This operation deletes the old redo log files and creates new redo log files.E、This operation updates all current datafiles and online redo logs and all subsequent archived redo logs with a new RESETLOGS SCN and time stamp.
考题
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.
考题
The Log Writer （LGWR） process reads information from the （）and writes it to the online logs.A、large poolB、shared poolC、data buffer cacheD、redo log bufferE、data dictionary cache
考题
You are maintaining your OLTP database in Oracle10g. While observing the performance of the database， you find that the log switch occurs more than once for every 20 minutes， affecting the database performance. Which factor is responsible for frequent log switches？（） A、the value of the UNDO_RETENTION initialization parameterB、the value of the optimal redo log file size provided by the Redo Logfile Size AdvisorC、the online redo log files sizeD、the number of redo log members in a group
考题
You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback？（）A、Oracle Flashback uses undo information to construct consistent data. B、You can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session. C、You can only use Oracle Flashback view of the data if the required records are still in the online redo log files. D、Oracle Flashback lists the DML that was executed during the period you identify when initiating your session.
考题
As soon as you discover that you have lost an online redo log， if the database is still functioning， what should be your first action？（） A、 Shut down the databaseB、 Clear the online redo logC、 Back up the databaseD、 Checkpoint the databaseE、 Call Oracle support
考题
You are adding redo logs to the Oracle database. Creating a new redo log adds information to which of the following Oracle resources? （）A、Shared pool B、Control file C、SGA D、PGA
考题
Because of a power outage， instance failure has occurred. From what point in the redo log does recovery begin and where does it end？（）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
考题
You have configured the flash recovery area to store online redo log files， control files， archived redo logs and RMAN backups. Which of the following files can you successfully delete from the flash recovery area if you want to reclaim the space within it？（）A、 multiplexed control filesB、 RMAN obsolete backupsC、 multiplexed online redo log filesD、 archived redo logs that have not been copied to tape
考题
The database is being restored from a closed backup. The data files， control files， password file， and parameter file are available， but the online redo logs are not. Because the online redo logs are not available， you must simulate recovery and alter the database open with the reset logs option so the online redo logs are created while the database opens. Which type of recover is used in this situation？（）A、until SCNB、until timeC、until cancelD、using backup control file
考题
One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）A、uses undo data for roll forwardB、uses Flashback Log for recoveryC、uses online redo logs to roll backD、uses undo data to roll back the transactionE、uses Recovery Manager （RMAN） to roll backF、uses the System Monitor （SMON） background process to perform instance recovery
考题
You are working as a DBA on Oracle Database 9i. You plan to upgrade your 9i database to Oracle 10g. To be familiar with the new database technology， you decide to install Oracle Database 10g on your workstation at home. You create a general purpose database. After the installation， you make the following changes in your initialization parameter file：LOG_ARCHIVE_DEST_1=’LOCATION=USE_DB_RECOVERY_FILE_DEST’ DB_RECOVERY_FILE_DEST = ’LOCATION=d：/product/10.1.0/flash_recovery_area’ DB_RECOVERY_FILE_DEST_SIZE=10g Where are the archived redo logs stored for your database？（）A、 The archived redo logs are stored in an operating system-dependent location.B、 The archived redo logs are stored in the location specified by LOG_ARCHIVE_DEST_1.C、 The archived redo logs are stored in the location specified by DB_RECOVERY_FILE_DEST.D、 The archived redo logs are stored in the locations specified by both LOG_ARCHIVE_DEST_1 and DB_RECOVERY_FILE_DEST.
考题
You have lost all your online redo logs. As a result， your database has crashed. You have tried to restart the database and clear the online redo log files， but when you try to open the database you get the following error. SQL startup ORACLE instance started. Total System Global Area 167395328 bytes Fixed Size 1298612 bytes Variable Size 142610252 bytes Database Buffers 20971520 bytes Redo Buffers 2514944 bytes Database mounted. ORA-00313： open failed for members of log group 2 of thread 1 ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3 ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3 SQL alter database clear logfile group 2； alter database clear logfile group 2 * ERROR at line 1： ORA-01624： log 2 needed for crash recovery of instance orcl （thread 1） ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log What steps must you take to resolve the error？（） a. Issue the recover database redo logs command. b. Issue the Startup Mount command to mount the database. c. Restore the last full database backup. d. Perform a point-in-time recovery， applying all archived redo logs that are available. e. Restore all archived redo logs generated during and after the last full database backup. f. Open the database using the alter database open resetlogs command. g. Issue the alter database open command.A、b， a， fB、e， b， a， fC、e， b， a， gD、b， a， gE、c， e， b， d， f
考题
In which scenario is a Database Administrator NOT required to perform an incomplete recovery？（）A、 when all the online redo log groups are multiplexed and one of the members of a group is missingB、 when all the online redo log groups are not multiplexed and one log group is missingC、 when all the control files are missingD、 when some important tables are deleted from the database and purged from the Recycle Bin
考题
Which of the following parameters defines the location where Oracle should create archived redo logs?（）A、LOG_ARCHIVE_1 B、LOG_DESTINATION_1 C、LOG_ARCHIVED_DESTINATION_1D、LOG_ARCHIVE_DEST_1E、LOG_ARCHIVE_SOURCE_1
考题
多选题You are using Oracle Database 10g. You performed an incomplete recovery of your database and opened the database with the RESETLOGS option. What is the effect of opening the database with the RESETLOGS option？ （）AThis operation resets the SCN for the database.BThis operation creates a new incarnation of the database.CThis operation moves all the redo log files to a different location.DThis operation deletes the old redo log files and creates new redo log files.EThis operation updates all current datafiles and online redo logs and all subsequent archived redo logs with a new RESETLOGS SCN and time stamp.
考题
单选题One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it？（）A
uses undo data for roll forwardB
uses Flashback Log for recoveryC
uses online redo logs to roll backD
uses undo data to roll back the transactionE
uses Recovery Manager （RMAN） to roll backF
uses the System Monitor （SMON） background process to perform instance recovery
考题
单选题You are adding redo logs to the Oracle database. Creating a new redo log adds information to which of the following Oracle resources? （）A
Shared pool B
Control file C
SGA D
PGA
考题
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？（）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
考题
单选题You are maintaining your database in Oracle10g. You have set the value of the STATISTICS_LEVEL initialization parameter to TYPICAL and the value of the FAST_START_MTTR_TARGET parameter to 900 seconds. To increase the performance of the database， you want to determine the optimal size of the online redo log files. Which tool enables you to determine the optimal size of the online redo log files？（）A
Oracle Enterprise ManagerB
The V$LOG viewC
The V$LOGFILE viewD
The V$FLASHBACK_DATABASE_LOGS view
考题
单选题In a situation where no multiplexing of redo logs takes place, what happens when Oracle cannot read data from the online redo log group for archiving?（）A
Nothing happensB
Oracle will automatically switch redo logs when detected C
Oracle eventually won't allow new records to be added to the database D
The instance crashes
考题
单选题In which scenario is a Database Administrator NOT required to perform an incomplete recovery？（）A
when all the online redo log groups are multiplexed and one of the members of a group is missingB
when all the online redo log groups are not multiplexed and one log group is missingC
when all the control files are missingD
when some important tables are deleted from the database and purged from the Recycle Bin
考题
单选题You are maintaining your OLTP database in Oracle10g. While observing the performance of the database， you find that the log switch occurs more than once for every 20 minutes， affecting the database performance. Which factor is responsible for frequent log switches？（）A
the value of the UNDO_RETENTION initialization parameterB
the value of the optimal redo log file size provided by the Redo Logfile Size AdvisorC
the online redo log files sizeD
the number of redo log members in a group
考题
多选题You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback？（）AOracle Flashback uses undo information to construct consistent data.BYou can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session.CYou can only use Oracle Flashback view of the data if the required records are still in the online redo log files.DOracle Flashback lists the DML that was executed during the period you identify when initiating your session.
考题
单选题You have lost all your online redo logs. As a result， your database has crashed. You have tried to restart the database and clear the online redo log files， but when you try to open the database you get the following error. SQL startup ORACLE instance started. Total System Global Area 167395328 bytes Fixed Size 1298612 bytes Variable Size 142610252 bytes Database Buffers 20971520 bytes Redo Buffers 2514944 bytes Database mounted. ORA-00313： open failed for members of log group 2 of thread 1 ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3 ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3 SQL alter database clear logfile group 2； alter database clear logfile group 2 * ERROR at line 1： ORA-01624： log 2 needed for crash recovery of instance orcl （thread 1） ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log What steps must you take to resolve the error？（） a. Issue the recover database redo logs command. b. Issue the Startup Mount command to mount the database. c. Restore the last full database backup. d. Perform a point-in-time recovery， applying all archived redo logs that are available. e. Restore all archived redo logs generated during and after the last full database backup. f. Open the database using the alter database open resetlogs command. g. Issue the alter database open command.A
b， a， fB
e， b， a， fC
e， b， a， gD
b， a， gE
c， e， b， d， f
考题
单选题What will be the result of the following configuration？（） Log_archive_dest_1=location=c：/oracle/arch/mydb Log_archive_dest_2=location=z：/oracle/arch/mydbA
An error will occur during database startup because the second parameter is not valid.B
An error will occur during database startup since you are trying to create archived redo logs in two different locations.C
Archived redo logs will be created in two different locations by the ARCH process.D
Archived redo logs will be created in two different locations by the LGWR process.E
Neither parameter setting is valid， so the database will not start up.
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