When a stack exceeds its capacity, it is called?

When a stack exceeds its capacity, it is called Stack Overflow.

Here are the steps to understand this:

1. A stack is a data structure used in computer programming. It follows the LIFO (Last In, First Out) principle, meaning the last element added to the stack will be the first one to be removed.

2. The capacity of a stack refers to the total number of elements it can hold.

3. When you try to add (or push) an item onto a stack that has already reached its capacity, there is no more space for the new item.

4. This situation is referred to as a Stack Overflow. It's like trying to add more dishes to a stack of dishes that's already teetering - eventually, it's going to topple over, or "overflow".

5. In computing, a Stack Overflow can cause programs to crash or behave unpredictably. It's something programmers try to avoid through good coding practices and error handling.

When a stack exceeds its capacity, it is referred to as a Stack Overflow. This typically happens in programming when too much memory is used on the call stack, which is used for low-level programming functions. When the stack is full and a program attempts to add more data to it, this results in a stack overflow error.