The positions that are given to depend on the college you are recruited from.
If TCS hires you from A grade MBA colleges then the desinations they give are,
- Management Trainee (MT’s) (For freshers)
Assistant Business Analyst (ABA) (For those from 0-3 years work exp)
- Business Analyst (BA) (3-5 years work exp)
- Assistant Consultant (AST) (5-8 years work exp)
From there on it goes like Assosciate Consultant, Consultant, Sr Consultant, Principal Consultant, VP etc.
The difference between Management Trainees (MT’s) and Assistant System Engineer (ASE) is that MT’s get a much bigger pay package.
The same difference between Assistant System Analyst (ASA) and ABA; the ABA would have way bigger pay package.
Same for IT Analyst (ITA) and BA. The BA gets a bigger package and as he rises in ranks his salary hike gets bigger too.
Also the variable component keeps getting bigger as you grow up the ranks when you come from a A grade B-school (like SP Jain, IIM, XLRI, IIFT, Jamna Lal Bajaj etc).
Hope that clears some doubts.