Popping from an empty stack typically throws an exception to indicate that the operation cannot be performed.

Popping an element from a queue implemented using a linked list can be done in constant time, O(1), if we maintain a pointer to the front of the queue.

A stack is used to implement a function call stack because it follows the LIFO principle, allowing the most recent function call to be completed first.

A stack uses the LIFO principle, meaning the last element added is the first one to be removed.

Push is a valid operation for a stack, allowing you to add an element to the top of the stack.

Dequeue is not allowed in a stack as it is a queue operation; stacks only allow push, pop, and peek operations.