The basic technique of most trees(Binary) uses the concept of DFS or BFS. The order of which we explore a three determines if its PRE_ORDER,POST_ORDER,IN_ORDER. I assume this concepts is all about doing same thing in ONLY 3 STEPS. VISIT ROOT - VISIT LEFT - VISIT RIGHT VISIT LEFT - VISIT ROOT - VISIT RIGHT VISIT RIGHT - VISIT LEFT - VISIT ROOT The order of which this visit is done determines if i..