A CPU has two modes-privileged and non-privileged. In order to change the mode from privileged to non-privileged

Consider a set of $$n$$ tasks with known runtimes $${r_1},{r_2},.....\,{r_n}\,\,$$ to be run on a uniprocessor machine. Which of the following processor scheduling algorithms will result in the maximum throughput?.

Which of the following does not interrupt a running process?

Suppose a processor does not have any stack pointer register. Which of the following statements is true?