Hi Sakshi,

There is no fixed pattern of what all can be asked in the practical examination as there is no syllabus or anything such like that for it.The maximum I can say is that pay attention in the practical class and listen attentively to what the teacher says as the teacher will mostly ask from the things he/she has taught .
However, you should not be 100% reliable on it and should try to to go through the syllabus provided to you.

All the best..