You'll have to change the hash (%studentInfo = ( ... );) to a hash reference ($studentInfo = { ... };). 
use Data::Dumper;

print $fh Data::Dumper->new([ $studentInfo ], [qw( $studentInfo )])
                      ->Purity(1)
                      ->Useqq(1)
                      ->Dump();

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In reply to Re^4: Changing Hash value in .pm file by ikegami
in thread Changing Hash value in .pm file by kranthi

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