SDE - 2

It was a screening round. HR asked me questions based on my experience and checked if I am a right fit for the role.

 Implement the folder creation process in operating system. There are two operations: Create/Delete. In create operation system will return Folder name along with count 

for example: Untitled Folder -1, Untitled Folder -2 and so on. In create operation it should always return the folder name with minimum number which is available.Delete operation will take folder number as parameter and it will simply delete the Untitled folder with that number.Sample Test Case:Operation #1 Create => Untitled Folder -1 Operation #2 Create => Untitled Folder -2Operation #3 Create => Untitled Folder -3Operation #4 Delete(2) => Delete Untitled Folder -2Operation #5 Create => Untitled Folder -2Operation #6 Create => Untitled Folder -4

Design a system like stackoverflow with below features

Write Question
Write answers
Upvote / Downvote -> once per user
Users
Comments (Optional)