Mostly McQ from past paper

Question
1_total number of channel of communication in 3 people
2_ nuclear reactor control process with catastoric_natural risk (2types likhni thi)
3_ models names, strength and weakness table tha. Sb dia tha unko property wise arrange krna tha
4_ DET sy related question tha... statement di thi DTE counted krny thy
EAsy paper tha
Conceptual mcqs thy 
your concepts should be clear in order to get good grades...