The term used to remove an element from a stack is push peek pop parse If a stack doubles in the amount of information that it contains, the time to pop an item onto the stack doubles in time is reduced by a factor of two increases exponentially remains constantn By definition, a link class within a link list will contain some key value some data a refercence variable to the link object some data and a reference to the next link The reference to another link in the link list is always null is the object's address in the computer memory is the object itself is a pointer to an indirect method push peek pop parse .