Use the Oracle Database 11g Release 2 online documentation to answer the following questio...

Use the Oracle Database 11g Release 2 online documentation to answer the following questions.

A. How does Oracle Database 11g Release 2 use read and write locks?

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B. What, if any, levels of transaction isolation are available in Oracle Database 11g Release 2?

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C. How does the security model for Oracle Database 11g Release 2 differ from that shown in Figure?

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Figure A Model of DBMS Security

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D. Summarize the backup capabilities of Oracle Database 11g Release 2.

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E. Summarize the recovery capabilities of Oracle Database 11g Release 2.