Why is it important to create a restriction map/ vector map?

Which of the following statements about conjugation is false?     After a F- cell has conjugated with an F+ cell, both cells would be F+.     Both Hfr and F+ bacteria have the ability to produce a sex pilus.     In F+ × F- conjugation, none of the bacterial chromosome is transferred; only the F factor is.     A Hfr strain usually transfers the entire bacterial chromosome to the recipient cell.     F' × F- conjugation can produce a partially diploid bacterial cell.

What is it called when F+ cell donates a dna plasmid to F-?

How many possible restriction maps are compatible with these data?