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单选题
In your database， UNDO_RETENTION has been set to 600 sec and UNDO tablespace is configured for RETENTION GUARANTEE. Which statement regarding RETENTION GUARANTEE is true？ （）
A
Undo data is retained until the next full database backup.
B
No committed undo data will be overwritten for 10 minutes.
C
Committed undo data will be kept forever if not overwritten within 600 seconds.
D
Guarantees that requested undo information are available until the instance is shut down.
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更多 “单选题In your database， UNDO_RETENTION has been set to 600 sec and UNDO tablespace is configured for RETENTION GUARANTEE. Which statement regarding RETENTION GUARANTEE is true？ （）A Undo data is retained until the next full database backup.B No committed undo data will be overwritten for 10 minutes.C Committed undo data will be kept forever if not overwritten within 600 seconds.D Guarantees that requested undo information are available until the instance is shut down.” 相关考题
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You are a database administrator for your company. The company uses a SQL Server 2005 application. Each night， data is imported into a database， and the database is then set to be read-only. During business hours， users run predefined and ad hoc queries. You need to monitor the servers performance during the day. What are two possible ways to achieve this goal？（）A、Use the Lock Waits/sec performance counter.B、Use the Number of Deadlocks/sec performance counter.C、Use the Transactions/sec performance counter.D、Use the Full Scans/sec performance counter.E、Use the Batches/sec performance counter.
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单选题Users in your PROD database complain about the slow response of the transactions. While investigating the reason， you find that the transactions are waiting for the undo segments to be available， and undo retention has been set to zero. What would you do to overcome this problem？（）A
increase the undo retentionB
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单选题In your database， you discovered that a tempfile in a locally managed temporary tablespace has been deleted at the operating system level. How would you recover the tablespace？（）A
flash back the databaseB
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考题
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The database will not start.B
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The database will start， and the undo segment will retain the undo data for at least 15 minutes.
考题
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The advisory memory has been turned off.B
The DB_CACHE_ADVICE parameter has been set to OFF in the parameter file.C
The STATISTICS_LEVEL parameter has been set to BASIC in the parameter file.D
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考题
单选题Your database is running under automatic undo management and the UNDO_RETENTION parameter is set to 900 sec. You executed the following command to enable retention guarantee： SQL ALTER TABLESPACE undotbs1 RETENTION GUARANTEE; What effect would this statement have on the database？（）A
The extents in undo tablespace retain data until the next full database backup.B
The extents containing committed data in the undo tablespace are never overwritten.C
The extents which no longer contain uncommitted data in the undo tablespace are not overwritten for at least15 minutes.D
The extents containing committed data in the undo tablespace are not overwritten until the instance is shut down.
考题
单选题Every Sunday the Unix system administrator has a job that executes a full backup of the entire Unix system your database is on. Is this backup usable for backup and recovery of your database？（）A
Yes， if the database is in ARCHIVELOG modeB
Yes， if the database is in NOARCHIVELOG modeC
No， the backup is not usable in any wayD
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考题
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by using the RMAN utilityB
by using the export/import utilityC
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考题
单选题In your database， the RESULT_CACHE_MODE parameter has been set to MANUAL in the initialization parameter file. You issued the following command： SQLSELECT /*+ RESULT_CACHE */ sale_category， sum（sale_amt） FROM sales GROUP BY sale_category； Where would the result of this query be stored（）？A
database buffer cacheB
shared poolC
PGAD
large pool
考题
单选题Automatic Shared Memory Management （ASMM） has been enabled for your database instance. Theinitialization parameters for the components that are managed by ASMM are not set. After observing theeffects of ASSM， you executed the following command： SQL ALTER SYSTEM SET DB_CACHE_SIZE = 100M； Which statement is true in this scenario（）A
The minimum memory size for the database buffer cache is set to 100 mb.B
The maximum memory size that can be obtained by the database buffer cache during ASMM is set to100 mbC
The minimum memory size allocated for a server process in the database buffer cache in dedicatedmode is set to 100 mb.D
The maximum memory size from the database buffer cache that can be released for dynamicdistribution during ASMM is set to 100 mb
考题
单选题You work as a database administrator for Supportcenter.cn. Your database is configured for automatic undo management. UNDO_RETENTION is set to 3 hours. You want to flash back a table that was created last year. How far back can the flashback query go？（）A
3 hoursB
6 monthsC
until last yearD
until last commitE
until the point when the undotablespacewas refreshedF
until the database is shut down and the memory erased
考题
单选题You configured the Flash Recovery Area for your database. The database instance has been startedin ARCHIVELOG mode and the LOG_ARCHIVE_DEST_1 parameter is not set. What will be the implications on the archiving and the location of archive redo log files（）A
Archiving will be disabled because the destination for the redo log files is missing.B
The database instance will shut down and the error details will be logged in the alert log file.C
Archiving will be enabled and the destination for the archived redo log file will be set to the FlashRecovery Area implicitly.D
Archiving will be enabled and the location for the archive redo log file will be created in the defaultlocation $ORACLE_HOME/log.
考题
多选题You are a database administrator for your company. The company uses a SQL Server 2005 application. Each night， data is imported into a database， and the database is then set to be read-only. During business hours， users run predefined and ad hoc queries. You need to monitor the servers performance during the day. What are two possible ways to achieve this goal？（）AUse the Lock Waits/sec performance counter.BUse the Number of Deadlocks/sec performance counter.CUse the Transactions/sec performance counter.DUse the Full Scans/sec performance counter.EUse the Batches/sec performance counter.
考题
单选题Initially， for the Automatic Workload Repository （AWR） statistics，the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database. You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However，when you observe the Memory Advisor on a Friday，you find that the statistics are available only for two days， Thursday and Friday，of that week. What would have caused the statistics to be removed？（）A
On Wednesday， the statistics have been purged.B
On Wednesday， the retention period has been set to zero.C
On Wednesday， the collection interval has been set to zero.D
On Wednesday， the collection level has been changed to All.E
On Wednesday， the retention period has been set to one day.F
On Wednesday， the retention period has been set to two daysG
On Wednesday, the collection level has been changed to Typical.H
On Wednesday, the collection interval has been set to 1440 minutes.
考题
多选题Your PROD database has been started using the server parameter file. In your PROD database you are using RMAN for backup and recovery operations. You issue the following commands from the RMAN prompt： RMAN CONFIGURE CONTROLFILE AUTOBACKUP OFF； RMAN BACKUP DATABASE； Which files from the database will be backed up as a result of this BACKUP command？（）Acontrol fileBall datafilesCpassword fileDonline redo log fileEarchive redo log fileFserver parameter fileGonly the SYSTEM datafile
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