**1st question:** Which scope object to be used if: 

1. You wish to maintain the user profile that the customer needs to enter in multiple pages.
2. You wish to validate the user id and password entered by user suing another servlet but in the same web application.

**2nd question:** The RequestDispatcher object has two methods, `include()` and `forward()`. What is the difference?

**3rd question:** Servlet uses a `javax.servlet.http.HttpServletResponse` object. How do you use it to return Text data and Binary data?