单项选择题
You have two tables with referential integrity enforced between them. You need to insert data to the child tablefirst because it is going to be a long transaction and data for the parent table will be available in a later stage，which can be inserted as part of the same transaction. View the Exhibit to examine the commands used tocreate tables.
Which action would you take to delay the referential integrity checking until the end of thetransaction（）
A.Set the constraint to deferred before starting the transaction.
B.Alter the constraint to NOVALIDATE state before starting the transaction.
C.Enable the resumable mode for the session before starting the transaction.
D.Set the COMMIT_WAIT parameter to FORCE_WAIT for the session before starting the transaction
相关考题
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单项选择题
ViewtheExhibittoexaminetheoutputproducedbythefollowingqueryatthreedifferenttimessincethedatabaseinstancestartedandhasexperiencedworkloadsofdifferentcapacities：SQL>SELECTsubstr（component，0，10）COMP，current_sizeCS，user_specified_sizeUSFROMv$memory_dynamic_componentsWHEREcurrent_size!=0；Whatdoyouinferfromthis（）
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 -
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
