线程可以实现在( ) 。①内核空间②用户空间③虚拟空间④物理空间
- A.①③
- B.②③
- C.①②
- D.③④
正确答案及解析
正确答案
解析
根据操作系统内核是否对线程可感知，可以把线程分为内核线程和用户线程。
用户线程由应用程序所支持的线程实现，内核意识不到用户级线程的实现。内核级线程又称为内核支持的线程。
所以，线程可以实现在内核空间和用户空间。
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