Algo8.ai interview questions

There was a phone call with HR and i gave all the details related to my work experience and skills and also my educational background to HR. She scheduled an interview for the next day. During the interview, interviewer asked me basic questions about Python. I answered him and there were two coding questions - Sum and Target question from leetcode. I answered that in two different approaches (O(n) and O(n*2) time complexity) correctly. There was one more pyhton DSA question and i solved it using 2 different approaches with O(n) and O(n*2) time complexity. Later while explaining the solution to the interviewer i came to understand that even the interviewer dont know what is difference between O(n2) time complexity and how it will work. Its waste of time giving interview to this company.