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Scenario:
I have used this command in 11g where I was not able to use "exp" utility for exporting tables with no rows.

Issue:
I was not able to export tables with '0' rows, objects were not created while taking .dmp file.

Resolution:
Execute below query on tables from where you want to export

select'alter table '||table_name || ' allocate extent;'from user_tables

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