单项选择题
View the Exhibit to examine the output produced by the following query at three different times since thedatabase instance started and has experienced workloads of different capacities：SQL> SELECT substr（component， 0， 10） COMP， current_size CS， user_specified_size US FROM v$memory_dynamic_componentsWHERE current_size!=0；What do you infer from this（）
A.The database instance is running with manual PGA management.
B.The database instance is running with manual shared memory management.
C.The database instance has the MEMORY_TARGET value set to a nonzero value.
D.All sessions are connected to the database instance in dedicated mode， and no RMAN or parallel queryoperations have been performed
相关考题
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多项选择题
Youperformdifferentialincrementallevel1backupsofyourdatabaseoneachworkingdayandlevel0backuponSundays，totape.Whichtwostatementsaretrueaboutdifferentialincrementalbackups（）
A.The backup performed on Sundays contains all the blocks that have ever been used in the database.
B.The backup performed on Sundays contains all the blocks that have changed since the last level 1 backup.
C.The backup performed on each working day contains all the blocks that have changed since the last level 0 backup.
D.The backup performed on Monday contains all the blocks that have changed since the level 0 backup， and every other working day contains all the blocks that have changed since the level 1 backup -
多项选择题
You receive complaints from users regarding the high waiting time for their transactions. Oninvestigation， you find that some users are not committing their transactions though they are notperforming any activity for a long time. As a result， SQL statements need to wait for row-level locks. Which two actions could you take to prevent this locking problem in the future（）
A.Decrease the IDLE_TIME resource limit in the profile assigned to the blocking users.
B.Use Database Resource Manager to automatically log out sessions that block others and are idle.
C.Set the limit in the profile of blocking users to control the number of blocks to be accessed in a session.
D.Decrease the maximum number of interested transaction list （ITL） slots for the segments on which the blocking user performs the transaction -
多项选择题
WhichtwostatementsdescribegoodpracticesforanapplicationdevelopertoreducelockingconflictsinOracledatabase（）
A.Avoid coding unnecessary long-running transactions.
B.Allow the database to handle locks in default locking mode.
C.Always explicitly code the locks as per the requirement of the application.
D.Allow escalation of row locks to block locks if too many row locks cause problem.
