@yhan-yhan,
exam is a tough exam,the passing rate i guess is somewhat higher than other nursing exams. read very well,u need to review diseases case by case concentrate mainly on the "hallmarks" of the disease, the best drug of choice, and the main nursing responsiblity...read all the types of tubes like ET, colostomy, chest tubes etc, and u need to know normal and abnormal findings for each,for example WHAT IS THE EXPECTED STOOL APPEARANCE POST COLOSTOMY? or for colostomy irrigation which type of solution to be used? and how much of solution and how high should the solution be raised while irrigating..good luck