单选题：Which of the following statements is incorrect?
Which of the following statements is incorrect? @[B](1)
A. When one process is executing in its critical section, no other process is to be allowed to execute in its critical section.
B. An operating system with a non-preemptive kernel is free from all kinds of race conditions.
C. A preemptive kernel allows a process to be preempted while it is running in kernel mode.
D. A preemptive kernel may be more responsive to user requests compared to a non-preemptive one.
A.When one process is executing in its critical section, no other process is to be allowed to execute in its critical section.
B.An operating system with a non-preemptive kernel is free from all kinds of race conditions.
C.A preemptive kernel allows a process to be preempted while it is running in kernel mode.
D.A preemptive kernel may be more responsive to user requests compared to a non-preemptive one.
答案：B
A. When one process is executing in its critical section, no other process is to be allowed to execute in its critical section.
B. An operating system with a non-preemptive kernel is free from all kinds of race conditions.
C. A preemptive kernel allows a process to be preempted while it is running in kernel mode.
D. A preemptive kernel may be more responsive to user requests compared to a non-preemptive one.
A.When one process is executing in its critical section, no other process is to be allowed to execute in its critical section.
B.An operating system with a non-preemptive kernel is free from all kinds of race conditions.
C.A preemptive kernel allows a process to be preempted while it is running in kernel mode.
D.A preemptive kernel may be more responsive to user requests compared to a non-preemptive one.
答案：B