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?（）ANothing happensBOracle will automatically switch redo logs when detected COracle eventually won't allow new records to be added to the database DThe instance crashes
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 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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相关考题：
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.
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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
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.
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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
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
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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 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
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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
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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.
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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? （）AShared pool BControl file CSGA DPGA
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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
单选题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.
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？（）Athe value of the UNDO_RETENTION initialization parameterBthe value of the optimal redo log file size provided by the Redo Logfile Size AdvisorCthe online redo log files sizeDthe number of redo log members in a group
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.Ab， a， fBe， b， a， fCe， b， a， gDb， a， gEc， e， b， d， f
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.