(Choose 1 answer)
Which of the following is not correct about user-level threads?
A. User-level threads are more efficient than kernel threads, in the sense that they do not need kernel calls to switch among threads
B. User-level threads cannot be preempted by clock interrupts unless the whole process' quantum has been used up
C. With user-level threads, customized scheduling algorithms cannot be implemented
D. If one user-level thread makes a blocking system call, the system will block the entire process (whichcontains that user-level thread)
antonis ni
Ext 24
