1. Write a Python code to detect outliers using the IQR method.
2. What is the difference between R-squared and adjusted R-squared?
3. You are a bank owner and need to design a new credit system. What factors will you consider before judging whether a customer should be given a loan or not?
4. Are Python strings mutable or immutable?
5. What is the Order-to-Cash (OTC) cycle?