Quite freestyle. Depends on who's available from the operations for interview. Could be a panel interview of five to twenty people. They will ask how capable you are in taking the job.
Aptitude Test are way too long but its easy. You just have to answer their written Aptitude Test then wait for the result and Final Interview with your Managers, Supervisors, etc.
Interview questions [1]
Question 1
Are you willing to accept other Job offers in our company?
There are many of us in the table for a different job post. The interviewer made us wait for 2 1/2 hour before the the first applicant is called. The interview went well when in comes to who have you been in your previous employer and what will they benefit from you. They look for an experienced employee for the job the I am applying for but they will pay less than the minimum.. Work at your own risk is what I can call for the job