Which option used along with find prompts the user for confirmation before any operation is performed on a file ?

The command rmdir c-prog will not work if :

The command ls | more displays a list of :

Which special variable will display the exit status of the last executed command in Bourne or Korn shell?

Which variable will display the list of the positional parameters?

Which option of the uniq command would you use to display only those lines which have a multiple occurrence ?