Which of the following is a valid use case for a stack?
Practice Questions
Q1
Which of the following is a valid use case for a stack?
Undo functionality in applications
Managing print jobs
Handling requests in a web server
All of the above
Questions & Step-by-Step Solutions
Which of the following is a valid use case for a stack?
Step 1: Understand what a stack is. A stack is a data structure that follows the Last In, First Out (LIFO) principle, meaning the last item added is the first one to be removed.
Step 2: Think about where you might need to reverse actions. For example, in a text editor, if you type something and want to go back to the previous state, you need to undo your last action.
Step 3: Realize that when you press 'undo', the application needs to remember what you did last. This is where a stack comes in.
Step 4: Each time you perform an action (like typing or deleting), that action is pushed onto the stack.
Step 5: When you press 'undo', the application pops the last action off the stack and reverses it, effectively allowing you to go back to the previous state.
