多选题You notice that the elapsed time for an important database scheduler Job is unacceptably long. The job belongs to a scheduler job class and window. Which two actions would reduce the job's elapsed time?()AIncreasing the priority of the job class to which the job belongsBIncreasing the job's relative priority within the Job class to which it belongsCIncreasing the resource allocation for the consumer group mapped to the scheduler job's job class within the plan mapped to the scheduler windowDMoving the job to an existing higher priority scheduler window with the same schedule and durationEIncreasing the value of the JOB_QUEUE_PROCESSES parameterFIncreasing the priority of the scheduler window to which the job belongs

多选题
You notice that the elapsed time for an important database scheduler Job is unacceptably long. The job belongs to a scheduler job class and window. Which two actions would reduce the job's elapsed time?()
A

Increasing the priority of the job class to which the job belongs

B

Increasing the job's relative priority within the Job class to which it belongs

C

Increasing the resource allocation for the consumer group mapped to the scheduler job's job class within the plan mapped to the scheduler window

D

Moving the job to an existing higher priority scheduler window with the same schedule and duration

E

Increasing the value of the JOB_QUEUE_PROCESSES parameter

F

Increasing the priority of the scheduler window to which the job belongs


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You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table:  SQL FLASHBACK TABLE ORDERS TO SCN 771513;   What is the prerequisite to perform Flashback Table?()A、 You must configure OMF in your database.B、 You must enable block change tracking feature in your database.C、 You must enable ROW MOVEMENT feature on the ORDERS table.D、 You must use the Flashback Version Query before using the Flashback Table feature.

You notice a performance change in your production Oracle database and you want to know which change has made this performance difference. You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) report to further investigation. Which three findings would you get from the report?()A、It detects any configuration change that caused a performance difference in both time periods.B、It identifies any workload change that caused a performance difference in both time periods.C、It detects the top wait events causing performance degradation.D、It shows the resource usage for CPU, memory, and I/O in both time periods.E、It shows the difference in the size of memory pools in both time periods.F、It gives information about statistics collection in both time periods.

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单选题“You are very selfish. It’s high time you will realize that you are not the most important person in the world.” Edgar said to his boss angrily.Arealized Bhave realizedCrealize Dshould realized

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单选题You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user/x7fmanaged consistent backups are performed every Sunday night. On Thursday morning, you find that an important table has been dropped and purged.  With reference to this scenario, up to what point in time can the data be recovered?()Auntil Thursday morningBuntil last Sunday’s backupCuntil Wednesday eveningDuntil that point in time when the database is openedEuntil that point in time when the recovery is performedFuntil that point in time when the table is dropped and purged

单选题An important tablespace of your database is dropped by mistake. You use the Flashback Database feature to retrieve the tablespace. You perform the following steps to retrieve the tablespace:   1. You log on to Enterprise Manager as SYSDBA.    2. You select the maintenance screen.    3. You choose Perform Recovery option on the maintenance screen.    4. You choose Whole Database in the Object Type drop-down list Perform Recovery: Type screen. 5. You choose Recover to Current Time from the Operation Type on the Perform Recovery: Type screen.    6. You provide the Host Credentials for a database user. on the Perform Recovery: Type screen.    7. You click the continue button.    An information screen appears saying that the database is unavailable. What is this information screen?()ARecovery ManagerBRecovery WindowCRecovery WizardDEnterprise Manager Home Page

单选题You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table:  SQL FLASHBACK TABLE ORDERS TO SCN 771513;   What is the prerequisite to perform Flashback Table?()A You must configure OMF in your database.B You must enable block change tracking feature in your database.C You must enable ROW MOVEMENT feature on the ORDERS table.D You must use the Flashback Version Query before using the Flashback Table feature.

单选题Your database is set in NOARCHIVELOG mode and is backed up every night. There are 10 redo log groups on the database, each with three members, making a total of 30 redo log files. At lunchtime the server unexpectedly gets shut down. Upon restarting you notice that the data file belonging to the SYSTEM tablespace has become corrupted. You also notice that there have been 15 log switches during the day. Which solution should you use to recover as much committed data as possible?()ARestore the data file for the SYSTEM tablespace then open the database. BRestore all redo logs form last night's backup, then restart the database. CPerform a complete restore of all files from last night's backup. Data entered into the database today must be reentered. DMount the instance, take the SYSTEM tablespace offline, open the database, and then restore the data file, recover it, and bring the tablespace online.

单选题In your database instance, the user sessions are connected to the database server from the remotemachines. You want to achieve the following for these users:  1:The user account must be locked after four unsuccessful login attempts.PASSWORD_LOCK_TIME  2:The user must be prompted to change the password at regular intervals.PASSWORD_LIFE_TIME  3:The user may not have more than three simultaneous sessions.SESSIONS_PER_USER  4:The user session must automatically be logged off if more than 10 minutes elapsed time used.CONNECT_TIME  How would you accomplish the above()Aby assigning profiles for the usersBby implementing Fine-Grained Auditing (FGA)Cby granting a secure application role to the usersDby implementing the Database Resource Manager plan

单选题You manage a SQL Server 2005 database that contains a table with many indexes.  You notice that data modification performance has degraded over time. You suspect that some of the indexes are unused. You need to identify which indexes were not used by any queries since the last time SQL Server 2005 started. Which dynamic management view should you use?()Asys.dm fts index populationBsys.dm exec query statsCsys. dm db index usage statsDsys.dm db index physical stats

多选题You notice a performance change in your production Oracle database and you want to know which change has made this performance difference. You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) report to further investigation. Which three findings would you get from the report?()AIt detects any configuration change that caused a performance difference in both time periods.BIt identifies any workload change that caused a performance difference in both time periods.CIt detects the top wait events causing performance degradation.DIt shows the resource usage for CPU, memory, and I/O in both time periods.EIt shows the difference in the size of memory pools in both time periods.FIt gives information about statistics collection in both time periods.

单选题In which scenario will you use the Flashback Transaction Query feature?()A when you want to restore an important table that is dropped from the Recycle BinB when you want to obtain the SQL statements to undo the deletion of some important records from a table by a transactionCwhen you want to restore a dropped user’s schemaD when a row of a table is updated many times within a specific time period and you want all the versions of the row in the specified time period

单选题You executed the following query in your database:  FROM V$FLASHBACK_DATABASE_LOG;  What would you determine from the output?()Athe time when the last flashback operation in your database was performedBthe time when the first flashback operation in your database was performedCa list of flashback operations performed in your database using SCN and timeDthe approximate time and the lowest system change number (SCN) to which you can flash back your database

单选题You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user-managed consistent backups are performed every Sunday night. On Thursday morning, you find that an important table has been dropped and purged. With reference to this scenario, up to what point in time can the data be recovered?()A until Thursday morningB until that point in time when the database is openedC until that point in time when the recovery is performedD until last Sunday’s backupE until that point in time when the table is dropped and purgedF until Wednesday evening

单选题“You are too self-centered. It’s high time you _____ that you are not the most important person in the world,” Edgar said to his boss angrily.ArealizedBhave realizedCrealizeDshould realize