A AND C ARE CORRECT BECAUSE THE DBA CAN CHOOSE TO CONFIGURE MULTIPLE ARCHIVE AND DATABASE WRITER PROCESSES
9.
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A, C, and E. A and C are correct because the DBA can choose to configure
multiple archive and database writer processes. E is correct because one server
process will be launched for every concurrent session.
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B and D. These are wrong because an instance can have only one log
writer process and only one checkpoint process.