多項選擇題

Exhibit.
Which two options are used to enable the connect-time failover feature？（）

A.Use only the first address.
B.Try one address， selected at random.
C.Try each address， in order， until one succeeds.
D.Try each address， randomly， until one succeeds.
E.Use each address in order until destination reached.

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單項選擇題

One of the users in the PROD database，Adams，complains that his update on the table，TRANS， is taking an unusually long time to complete. You find that the table gets locked by another database user before Adams starts his transactions，and you are unable to contact the user holding the table lock. As Adams is updating some crucial rows in the table， he should get the highest priority.
Which method would you use to overcome this problem？（）

A.execute the command， ALTER SESSION KILL ..， to kill the blocking session
B.execute the DBMS_SESSION.KILL_SESSION procedure to kill the blocking session
C.execute the command， ALTER SYSTEM KILL SESSION ..， to kill the blocking session
D.execute the command， ALTER SESSION UNLOCK ..， to release the lock for the blocking session
E.execute the command， ALTER SYSTEM UNLOCK SESSION ..， to release the lock for the blocking session

單項選擇題

What advantage would you get if you increase the length of time during which the undo information would be stored in the database？（）

A.roll back of large transactions
B.roll forward to redo a transaction
C.data concurrency for large updates
D.read consistency for long-running transactions

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Exhibit. Which two options are used to enable the connect-time failover feature？（）

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What advantage would you get if you increase the length of time during which the undo information would be stored in the database？（）

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Exhibit.
Which two options are used to enable the connect-time failover feature？（）