Which way of connecting printer to computer requires CPU intervention via an interrupt for each character transmitted?

Which way of connecting printer to computer requires IP address, which you configure on the printer?

Which way of connecting printer to computer was frequently used in older UNIX systems is too slow for modern printers?

User wants to do something that requires him to be the root. In which situation he will be able to do it and a security risk on a system will be minimal?

Which of the following characters is not a globbing character in Unix?