u just have to master your current affairs,why do you want to work with the organisation and some questions might come from your educational ba ground,finally u have to study ur cv very well,becuase they will start from asking u to tell them about urself.i just did my own interview last month in kano.just be bold enugh,even when you dont know what to answer,try as much as you can to say something.i pray that we jam dere.i wish u good luck and gods favour.care