单选题Why can setting too low a value for the FAST_START_MTTR_TARGET parameter reduce your overall database performance？（）AData blocks have to be written more frequently by DBWR. BRedo blocks have to be written more frequently by LGWR. CYou need to substantially increase the size of your database buffer cache to hold the additional checkpoint records. DYou need to substantially increase the size of your redo buffer cache to hold the additional checkpoint records.
单选题
Why can setting too low a value for the FAST_START_MTTR_TARGET parameter reduce your overall database performance？（）
A
Data blocks have to be written more frequently by DBWR.
B
Redo blocks have to be written more frequently by LGWR.
C
You need to substantially increase the size of your database buffer cache to hold the additional checkpoint records.
D
You need to substantially increase the size of your redo buffer cache to hold the additional checkpoint records.
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You are working on the 24X7 database with high transaction volume， to ensure faster instance recovery on your database you set the FAST_START_MTTR_TARGET initialization parameter to a very low value. What effect it will have on the database？（）A、The database performance would be enhanced.B、The redo log files would be get filled more frequently.C、The overall database performance would be degraded.D、The mean time to recover （MTTR） would be increased.
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Why can setting too low a value for the FAST_START_MTTR_TARGET parameter reduce your overall database performance？（）A、Data blocks have to be written more frequently by DBWR. B、Redo blocks have to be written more frequently by LGWR. C、You need to substantially increase the size of your database buffer cache to hold the additional checkpoint records. D、You need to substantially increase the size of your redo buffer cache to hold the additional checkpoint records.
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What is the implication of setting the initialization parameter FAST_START_MTTR_TARGET to 0 in your database？（）A、MTTR Advisor would be disabled.B、Redo Log Advisor would be disabled.C、Automatic tuning of checkpoint would be disabled.D、Checkpoint information would not be written to the alert log file.
You want to check all the data blocks being written to the datafiles by analyzing the data on each block every time the DBWn process writes. Which action will you perform to check the data blocks？（）A、 Set the value of the DB_BLOCK_CHECKING initialization parameter to TRUEB、 Use the ANALYZE utility.C、 Use the DBVERIFY utility.D、 Use the DBMS_REPAIR package.
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多选题In your production database， you have observed that the database server performance degrades whenever there is a switch between the log groups. On further investigation， you find that the database is running in ARCHIVELOG mode and the archived log files are being written to the same disk that is used to store the redo log members. Which two actions would you take to improve the performance of the database server？ （）Aincrease the size of the redo log bufferBincrease the number of redo log groupsCincrease the number of log writer processesDincrease the number of ARCn processesEchange the appropriate LOG_ARCHIVE_DEST_n parameter to place the archived log files in a separate location
多选题You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） to perform backups in your databases. Which four backup operations can be performed using RMAN？（）AA backup of the target database when it is mountedBA backup of online redo log files when the database is openCA backup of only used data blocks in the file beingbeingbackup upDA backup of online， read/write data files when the database is openEA backup of only those data blocks that have changed since a previous backupFA backup of online， read/write data files when the database is in the NOMOUNT state.
单选题In the instance of the PROD database， the checkpoint （CKPT） process runs after every minute. A database user updates the rows of the ORDERS table. Because of the configuration， the CKPT process gets initiated before the user commits the transaction. What would happen to the modified blocks when the CKPT process is started？（）AThe modified blocks would be written to the data files.BThe modified blocks would be written to the temp files.CThe modified blocks would be written to the control file.DThe modified blocks would be written to the redo log files.EThe modified blocks would be written to the archived redo log files.FThe modified blocks would be retained in the database buffer cache.
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 log file size that should equal the minimum size of all the online redo log files. Which column will enable you to perform the desired task？（）A the WRITES_LOGFILE_SIZE column of the V$INSTANCE_RECOVERY viewB the column of the V$INSTANCE_RECOVERY viewC the OPTIMAL_LOGFILE_SIZE column of the V$INSTANCE_RECOVERY viewD the LOG_FILE_SIZE_REDO_BLKS column of the V$INSTANCE_RECOVERY view
单选题Why can setting too low a value for the FAST_START_MTTR_TARGET parameter reduce your overall database performance？（）AData blocks have to be written more frequently by DBWR. BRedo blocks have to be written more frequently by LGWR. CYou need to substantially increase the size of your database buffer cache to hold the additional checkpoint records. DYou need to substantially increase the size of your redo buffer cache to hold the additional checkpoint records.
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
单选题You are maintaining your database in Oracle10g. While performing an incremental backup of the database， you want to back uponly those blocks that have changed since the last backup. Which file will you create to increase the performance of the backup operation while performing the incremental backup of the database？（）A redo log filesB password fileC control fileD change tracking file
单选题You have a range-partitioned table in your database. Each partition in the table contains the sales data for a quarter. The partition related to the current quarter is modified frequently and other partitions undergo fewer data manipulations. The preferences for the table are set to their default values. You collect statistics for the table using the following command in regular intervals： SQL EXECUTE DBMS_STATS.GATHER_TABLE_STATS（’SH’，’SALES’，GRANULARITY=’GLOBAL’）； You need statistics to be collected more quickly. What can you do to achieve this？（）A Set DYNAMIC_SAMPLING to level 4B Set the STATISTICS_LEVEL parameter to BASICC Set the INCREMENTAL value to TRUE for the partition tableD Increase the value of STALE_PERCENT for the partition table
多选题Which two statements are true regarding the database in ARCHIVELOG mode？（）AYou have to shut down the database to perform the backups.BArchiving information is written to the data files and redo log files.CYou can perform complete database backups without closing the database.DOnline redo log files have to be multiplexed before putting the database in ARCHIVELOG mode.EAll the previous database backups become invalid after you configure the database to ARCHIVELOG mode.
单选题You are working on the 24X7 database with high transaction volume， to ensure faster instance recovery on your database you set the FAST_START_MTTR_TARGET initialization parameter to a very low value. What effect it will have on the database？（）AThe database performance would be enhanced.BThe redo log files would be get filled more frequently.CThe overall database performance would be degraded.DThe mean time to recover （MTTR） would be increased.
单选题You want to check all the data blocks being written to the datafiles by analyzing the data on each block every time the DBWn process writes. Which action will you perform to check the data blocks？（）A Set the value of the DB_BLOCK_CHECKING initialization parameter to TRUEB Use the ANALYZE utility.C Use the DBVERIFY utility.D Use the DBMS_REPAIR package.