In a Java EE messaging application, one MDB is consuming a lot of memory at high traffic.    What configuration should you use to prevent possible out-of-memory error at high traffic and at the same time not losing messages?（）

Given： A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）

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Which statement is true about a whole consistent database backup on a database running in ARCHIVELOGmode（）

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A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command：java games.cards. Poker What allows the user to do this？（）

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Given two files， GrizzlyBear.java and Salmon.java： If both classes are in the correct directories for their packages，and the Mammal class correctly defines thefindSalmon（） method， which change allows this code to compile？（）

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What is true regarding a transaction executed in Automatic Undo Management mode？（）

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Youre performing tablespace point-in-time recovery on a tablespace called USERS. If an object in that tablespace has a foreign key constraint owned by another object in the INDEX_TBS  which statement is true？（）  

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You are working in a dedicated server environment. Your database is running in the automatic Program Global Area （PGA） memory management mode.   Which two statements are correct in this scenario？（）

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ou are in the middle of a transaction updating a very important table. The machine on which adatabase was running reboots because of power outage. This caused a database instance failure.  Which statement is true in this situation（）

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Given：  Which code， inserted at line 15， creates an instance of the Point class defined in Line？（）

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