更新时间：2018-11-22 15:57作者：王新老师
15 两页的内存，四页的文件，读取顺序为 1 2 1 3 1 2 4 2 1 3 1 2 4 2 1 2 3 4 3 1，FIFO，问cache hit ratio为多少
16 线程
选项 contained with a process
share an address space
share signals
share errno
swith的速度比process快
17 which one is not above IP
DNS, SNMP, HTTP, ARP, NTP
18 Map-Reduce Framework
19 Buffer overflow
20 system virtualization
VM, VMM, IO, memory space
21
#include
using namespace
void main()
{
cout << “hello world” << endl;
}
修改程序，不能修改主程序，使其输出为
initiate
hello world
destroy
22 process & thread
virtual memory space
kernel register, stack
fork
copy-on-write