Perl interview questions

1. -c in perl shebang line
2. # significance in pelr shebacnk line
3. use strict usage and definition
4. diff between chop/chomp
5. . in regex in perl
6. is perl greedy ? justify
7. sort an array
8. uniq element in array ?
9. sort hash
10. Difference between referencing /dereferncing in perl
11. passing hashes in perl using subroutine
12. what are hashes of hashes
13. DB connection statement(fetch data) in perl
14. difference bw fetchrow_array/fetchrow_arrayref/fetchrow_hashref
15. <> ?
16. modes in files handling in perl .