How to use “/ as sysdba” to export and import

1. For  windows  platforms
   
   exp userid=”"”/ as sysdba”"” file=export.dmp ...
   imp userid=”"”/ as sysdba”"” file=export.dmp ...
2. For  Unix  paltforms
   
   exp userid=\’/ as sysdba\’   file=export.dmp ...
   imp userid=\’/ as sysdba\’  file=export.dmp ...