FIS Software Engineer Trainee interview questions

I applied through clg(2019) .first round was aptitude test and some coding questions . after shortlisted in first round the call for further round in office(pune) there is GD,and multiple technical round and then hr round. i got selected and they give me token of appreciation and told me your r selected in last round of interview .But till the date I did not get offer latter from company .

Initially written test(Aptitude & Technical) will be carried out to shortlist the candidates. Then Technical HR round and this may be 1:1 / group/Panel If its done u receive a call/mail from HR personnel for the Background verification for the letter of offer