NO Gopinathannithya...once she exists from the country (until u hav da RP stamped) she cannot come again even though her visa will xpire in da mnth of may........u need to apply again a fresh visit visa.........and a person who s in a visit visa can stay for 6 mnths in qatar, intially u get for one month but u can xtend it till 5 i.e total 6 mnths regarded the medical test and othr formalites r done.....