CGI Senior Software Engineer interview questions

Total there will be four round of interview. And one round with HR discussion and other three is technical round.out of three one is with client side technical round. Interview process was smooth.

I went through the complete interview process and cleared all rounds with good feedback. But the HR team doesnt call back or respond to calls. When enquired, they come up with silly replies and finally came back with offer after 4 weeks. I noticed a very unprofessional attitude from HR Department.