Test: Stack - 2 - CUET Humanities MCQ

A stack can be represented in memory by using a linear linked list.

A linked list is a collection of objects linked together by references from an object to another object. By convention, these objects are named as nodes. A linked list consists of nodes where each node contains one or more data fields and a reference (link) to the next node.

Reverse Polish notation (RPN), also known as Polish postfix notation or simply postfix notation, is a mathematical notation in which operators follow their operands.

5*5=30 (Prefix operator is there, so the value is incremented)
5*4=20 (Postfix operator is there, so the value will not be incremented in this step)

Before the push operations, if the stack is not empty, the value of the top will be the index of the element currently on the top.

Parenthesis checker is a program that checks whether a mathematical expression is properly parenthesized.

The function peek() is used for getting the top data element of the stack, without removing it.

This is an attempt to delete an element from the already empty stack. This is true about stack underflow.

PUSH and POP are operations of stack data structure. PUSH is used to insert data on the top of stack. POP is used to delete data from the top of stack.

A stack is a typical data structure that may be accessed using the LIFO method. In a stack, each item is placed on the top of the previous item, one at a time. Items can be removed from either the top of the stack (FILO) or the bottom of the stack (FIFO).