There will be 2 set of papers for written round one is tech. paper & othermay be figure matric or general aptitude.If attended the campus in  L & T company then their will be figure matrics.

tech papers covers all of your subjects & c[c++] pgm

Their may be GD depending on no of students.They will give more importance for technical aspects.After tech round HR round will be easy .first que will be tell me about yourself .

 best of luck