Caterpillar Embedded Software Engineer interview questions

I have applied via campus placement. There are four rounds starting with aptitude, GD, technical and HR. The aptitude is average and can be passed.But GD comes to point where group contains 8 members watched by 2 panel members. The one way to pass the GD is talking much points than others.

HR screening: just to explain position, salary range and taking about yourself Video technical Interview with the lead and engineers, they have some questions regarding your experience and after that, they started asking regarding some Autosar and C language topics.