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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$LOG
B
V$LOGFILE
C
DBA_LOG_GROUPS
D
V$LOG_HISTORY
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更多 “单选题The performance of your database is affected by the presence of two log members in each online redo log group and the placement of redo log members of a group on the same disk. You decide to place the redo log members of a group on separate disks. Which view will you query to find the name and location of all the online redo log members？（）A V$LOGB V$LOGFILEC DBA_LOG_GROUPSD V$LOG_HISTORY” 相关考题
考题
Identify three scenarios in which you would recommend the use of SQL Performance Analyzer to analyzeimpact on the performance of SQL statements.()
A. Change in the Oracle Database versionB. Change in your network infrastructureC. Change in the hardware configuration of the database serverD. Migration of database storage from non-ASM to ASM storageE. Database and operating system upgrade
考题
Your database is open and the LISTENER listener running. You stopped the wrong listener LISTENER byissuing the following command:lsnrctl >STOPWhat happens to the sessions that are presently connected to the database Instance?（）A. They are able to perform only queries.B. They are not affected and continue to function normally.C. They are terminated and the active transactions are rolled back.D. They are not allowed to perform any operations until the listener LISTENER is started
考题
Your database supports an online transaction processing (OLTP) application.The application is undergoing some major schema changes, such as addition of new indexes and materialized views.You want to check the impact of these changes on workload performance.What should you use to achieve this?（）A. Database replayB. SQL Tuning AdvisorC. SQL Access AdvisorD. SQL Performance AnalyzerE. Automatic Workload Repository compare reports
考题
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？（）A、increase the size of the redo log bufferB、increase the number of redo log groupsC、increase the number of log writer processesD、increase the number of ARCn processesE、change the appropriate LOG_ARCHIVE_DEST_n parameter to place the archived log files in a separate location
考题
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？（）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.
考题
You work as a database administrator for Certkiller .com. In your database server， the parameter PLSQL_OPTIMIZE_LEVEL has been set to 2. What would this setting achieve？（）A、It degrades the run time and compiler performance.B、It provides better run time and compiler performance.C、It provides better optimization of the statement during parse time.D、It forces the rule based optimizer to be used for statement optimization.E、It provides better run time performance but slightly degraded compiler performance. F、It provides better run time performance but slightly degraded run time performance.
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
Your database supports an online transaction processing (OLTP) application. The application is undergoing some major schema changes, such as addition of new indexes and materialized views. You want to check the impact of these changes on workload performance. What should you use to achieve this?（）A、Database replayB、SQL Tuning AdvisorC、SQL Access AdvisorD、SQL Performance AnalyzerE、Automatic Workload Repository compare reports
考题
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
考题
You create a table in your database that contains 50，000 rows approximately. The queries performed on the table are complex and performed on the table frequently. Which advisor helps you achieve the best performance of database for queries by recommending the appropriate indexes？（） A、SQL Access AdvisorB、 Memory AdvisorC、SQL Tuning AdvisorD、 Segment Advisor
考题
In your database server， the parameter PLSQL_OPTIMIZE_LEVEL has been set to 2. What would this setting achieve？（）A、It degrades the run time and compiler performance.B、It provides better run time and compiler performance.C、It provides better optimization of the statement during parse time.D、It forces the rule based optimizer to be used for statement optimization.E、It provides better run time performance but slightly degraded compiler performance.F、It provides better run time performance but slightly degraded run time performance.
考题
Identify three scenarios in which you would recommend the use of SQL Performance Analyzer to analyzeimpact on the performance of SQL statements.（）A、Change in the Oracle Database versionB、Change in your network infrastructureC、Change in the hardware configuration of the database serverD、Migration of database storage from non-ASM to ASM storageE、Database and operating system upgrade
考题
Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10：00 P.M. and 10：30 P.M. The next day， you decide to flash back the database. Before you flash back the database， you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table？（）A、 V$DATABASEB、 V$UNDOSTATC、 V$FLASHBACK_DATABASE_LOGD、 V$FLASHBACK_DATABASE_STAT
考题
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？（）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.
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
单选题You have created a baseline metric， DISK_IO_BL， for the disk I/O metrics in your PROD database and you have been getting notifications whenever the database performance degrades. You optimize the database I/O to gain the performance and you decide to remove the baseline metrics. Which method would you use to remove the DISK_IO_BL baseline metrics？（）A
The baseline， once created， cannot be removed.B
Disable the baseline metrics in the Database Control Manage Metrics page.C
The baseline will be automatically removed once the database performance has been optimized.D
Drop the baseline metrics by usingDBMS_WORKLOAD_REPOSITORY.DROP_BASELINE procedure.
考题
多选题Identify three scenarios in which you would recommend the use of SQL Performance Analyzer to analyzeimpact on the performance of SQL statements.（）AChange in the Oracle Database versionBChange in your network infrastructureCChange in the hardware configuration of the database serverDMigration of database storage from non-ASM to ASM storageEDatabase and operating system upgrade
考题
单选题Automatic Shared Memory Management is disabled for your database instance. You realize that thereare cases of SQL statements performing poorly because of repeated parsing activity， resulting indegradation of performance. What would be your next step to improve performance？ （）A
Run the SQL Access Advisor.B
Run the Memory Advisor for the sga.C
Run the Memory Advisor for the pga.D
Run the Memory Advisor for the shared pool.E
Run the Memory Advisor for the buffer cache.
考题
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
考题
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
考题
单选题You find today’s performance of your production database to be the best ever. Therefore， you want to be notified in the future whenever the performance degrades by 10% of today’s performance. What is the first step that you would take to ensure this？（）A
create baseline metrics for today’s performanceB
write the current database metrics to a database table and create a trigger to compare with future database statisticsC
write the current database metrics to a flat file and create an operating script to compare with future database statisticsD
write the current database metrics to a database table and create a procedure to compare with future database statisticsE
write the current database metrics to a database table and submit a job using DBMS_JOB to compare with future database statistics
考题
单选题You create a table in your database that contains 50，000 rows approximately. The queries performed on the table are complex and performed on the table frequently. Which advisor helps you achieve the best performance of database for queries by recommending the appropriate indexes？（）A
SQL Access AdvisorB
Memory AdvisorC
SQL Tuning AdvisorD
Segment Advisor
考题
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.
考题
单选题You work as a database administrator for Certkiller .com. In your database server， the parameter PLSQL_OPTIMIZE_LEVEL has been set to 2. What would this setting achieve？（）A
It degrades the run time and compiler performance.B
It provides better run time and compiler performance.C
It provides better optimization of the statement during parse time.D
It forces the rule based optimizer to be used for statement optimization.E
It provides better run time performance but slightly degraded compiler performance. F
It provides better run time performance but slightly degraded run time performance.
考题
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？（）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.
考题
单选题You are using flat files as the data source for one of your data warehousing applications. You plan to move the data from the flat file structures to an Oracle database to optimize the application performance. In your database you have clustered tables. While migrating the data， you want to have minimal impact on the database performance and optimize the data load operation. Which method would you use to load data into Oracle database？（）A
use the external table populationB
use the Oracle Data Pump export and import utilityC
use the conventional path data load of SQL*Loader utilityD
use the direct path data load of Oracle export and import utility
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.
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