Bangla Puzzle interview questions

Their processes are given below: 1) Job Circular 2) CV Screening 3) Coding task for Software Engineer/ Problem Solving presentation for Marketing position 4) Reviewing their work 5) Online Interview 6) HR Interview 7) Appointment Letter

The sudden call for an interview without giving any time or preparation. Even they didn't ask am I available or not. The HR has no knowledge about recruit system or how to call for an interview.