单选题：The multi-programming system will not necessarily invoke the CPU
The multi-programming system will not necessarily invoke the CPU scheduler when @[D](1)
A. the running process runs out its time slice.
B. the running process causes errors.
C. the running process will wait for an event to occur.
D. a new process arrives.
A.the running process runs out its time slice.
B.the running process causes errors.
C.the running process will wait for an event to occur.
D.a new process arrives.
答案：D
A. the running process runs out its time slice.
B. the running process causes errors.
C. the running process will wait for an event to occur.
D. a new process arrives.
A.the running process runs out its time slice.
B.the running process causes errors.
C.the running process will wait for an event to occur.
D.a new process arrives.
答案：D