1 votes 1 votes Switching from privileged to non-privileged mode requires a non-privileged instruction according to this link https://gateoverflow.in/706/gate2001-1-13 But below has been quoted in this link https://gateoverflow.in/445/gate2008-34 http://www.cs.rochester.edu/courses/252/spring2014/notes/08_exceptions Transitions from kernel to user mode are performed explicitly by the operating system, generally at the end of an interrupt handler or kernel call, using a privileged RFE (return from exception) instruction. Kindly clear this ... Any sort of help is appreciated ... Thanks :) Operating System operating-system co-and-architecture + – Pawan Kumar 2 asked May 30, 2018 Pawan Kumar 2 1.5k views answer comment Share Follow See 1 comment See all 1 1 comment reply MrPeppermint commented Jun 8, 2018 reply Follow Share This is very ambiguous. The question is this. Who gets to access the mode bit? The user or the system? 0 votes 0 votes Please log in or register to add a comment.