u/Touch_Grass6767

I have back in 4 courses in sem-1 and didn't gave exams of sem-2 due to some reasons.I have some questions:
1)Can I also give improvement exams for the courses I performed poorly in sem-1.
2)Can I also give mid-sem and practical exam for these courses or only final sem exams.
3)How much impact will it have on my placements?

Also please tell whether they are allowed to sit in interviews of HFTs or Finance companies(specifically asking for Msc. Eco and Msc. Maths)