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单项选择题 Which of the following statements is true regarding the initialization parameter DIAGNOSTIC_DEST?()   The default value is the value of the environment variable $ORACLE_HOME; if $ORACLE_HOME isn’t set  

A、 then the default is set to $ORACLE_BASE  The default value is the value of the environment variable $ORACLE_BASE; if $ORACLE_BASE isn’t set,

B、 then it is set to $ORACLE_HOME

C、 DIAGNOSTIC_DEST is always equal to $ORACLE_HOME

D、 DIAGNOSTIC_DEST is always equal to $ORACLE_BASE

  • B
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