操作系统 - 2026 进行中

科目: 操作系统
级别: IV
类别: 大学生
测试题目: 英语
问题示例: When a user-mode program requests a protected operating-system service through a system call, what typically occurs first? The process is permanently terminated, The CPU disables virtual memory, The disk controller executes the request directly, The CPU switches to kernel mode and transfers control to the system-call handler