Question: A running program consists of one or more execution contexts plus an address space. In terms of execution contexts and address spaces, what is a

  1. A running program consists of one or more execution contexts plus an address space. In terms of execution contexts and address spaces, what is a process? What is a thread?
  2. When a thread exits, does a process exit? When a process exits, does a thread exit? Explain.
  3. Kernels in many operating systems support multiple execution contexts within the kernel, i.e. part of the kernel may be blocked waiting for an I/O event while another is processing a system call. Are these “execution contexts” best thought of as threads or processes? Why?

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