Pointers are useful in a. Traversing a linked list b. Pointing mistakes in input data c. Locating a particular sector of a magnetic disk d. All of the above

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Stack operations

A stack is a linear data structure that follows certain order to perform the operation; the order will be LIFO (Last In First Out) data structure. In the stack data structure elements/items are removed and added only from the top. The topmost stack item/element is pointed by the top pointer and the element which is added to the stack first will get deleted at the last.