What does ‘stack overflow’ refer to?Select one:a.Accessing item from an undefined stack.b.Adding items to a full stack.c.Removing items from an empty stack.d.Index out of bounds exception.

Sure, let's break down the options to understand what "stack overflow" refers to:

1. Accessing item from an undefined stack:

   • This would typically result in an error, but it is not specifically called a "stack overflow." It might be more accurately described as a "null reference" or "undefined reference" error.

2. Adding items to a full stack:

   • This is the correct definition of a "stack overflow." In computer science, a stack is a data structure that follows the Last In, First Out (LIFO) principle. When you try to add (push) an item to a stack that has reached its maximum capacity, it results in a stack overflow.

3. Removing items from an empty stack:

   • This situation is known as a "stack underflow." It occurs when you try to remove (pop) an item from an empty stack.

4. Index out of bounds exception:

   • This error occurs when you try to access an array or list element with an index that is outside its valid range. It is not specifically related to stacks and is not called a "stack overflow."

So, the correct answer is:

b. Adding items to a full stack.