Major??
...where is based? in USA?..
Buddy Your question is very generic, as many Airline Company have different Policy regarding assessment.
But, anyway brush up some general performance, such as various speed ( V1,VMU,VMCG,V2..ect), Balance field, Derate T/O, T/O Segment etc.
Some definition about the minimums MOCA,MORA,MEA...
Some definition about Go Around,Reject Landing, MIssed Approach,
Some climb gradients value (Missed app,SID,1 engine)
Holding Procedures!
They may ask you to desribe a certain approach with the charts.
Don't forget to review some System of your Aricraft, and some Operators thay ask you to draw the System ( check the Electric, tricky one!)
Good Luck
