Differentiate a Stack from a Queue in terms of memory management implementation in a computer system.

A Stack and a Queue are both abstract data types that are used in computer systems, but they are implemented and managed differently in terms of memory.

1. Stack: A stack is a linear data structure that follows the Last In, First Out (LIFO) principle. This means that the last element that is added to the stack is the first one to be removed. In terms of memory management, a stack is implemented using an array or a linked list. The memory for a stack is allocated at compile time. When an element is added, it is placed on top of the stack, and when an element is removed, it is taken from the top of the stack. This makes stack operations very fast, but it also means that the size of the stack is fixed and cannot be changed at runtime.

2. Queue: A queue is also a linear data structure, but it follows the First In, First Out (FIFO) principle. This means that the first element that is added to the queue is the first one to be removed. In terms of memory management, a queue is typically implemented using a doubly-linked list. The memory for a queue is allocated at runtime. When an element is added, it is placed at the end of the queue, and when an element is removed, it is taken from the front of the queue. This allows for more flexibility in terms of the size of the queue, but it can also make queue operations slower than stack operations.

In summary, the main difference between a stack and a queue in terms of memory management implementation is that a stack uses a LIFO principle and has a fixed size, while a queue uses a FIFO principle and has a variable size.