📄️ A
The given code implements a Stack data structure using a list. It provides methods to check if the stack is empty, add items to the stack, remove items from the stack, and display the contents of the stack. The code allows users to interactively perform stack operations such as adding students, displaying the stack, removing students, and exiting the program.
📄️ B
The checkBalance function uses a stack-based approach to check if an expression containing parentheses, curly braces, and square brackets is balanced, returning True if it is and False otherwise.