A stack is the common set of programs used in a computer. Stack definition in operating system with the explanation to review "What is Stack?" Infix 2. for distance learning. Push and pop are carried out on the topmost element, which is the item most recently added to the stack. Another way of looking at a push-down list - or stack - is that the program always takes its next item to handle from the top of the stack. Please contact us. Stacks can be implemented by using arrays of type linear. Each cycle processes a single instruction. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. It is usually defined at the start of a program. Stacks in computing architectures are regions of memory where data is added or removed in a last-in-first-out manner. A stack is a tidy pile, like the stack of books on your nightstand or the stack of pancakes on your plate at breakfast. There are many real-life examples of a stack. How to use stack in a sentence. When an object is added to a stack, it is placed on the top of all previously entered items. Semantics is meaning. 0. LIFO stacks, also known as "push down" stacks, are the conceptually simplest way of saving information in a temporary storage location for such common computer operations as mathematical expression evaluation and recursive subroutine calling. Working Principle of Stack . See protocol stack. A stack overflow is an undesirable condition in which a particular computer program tries to use more memory space than the call stack has available. The