What is an OSS zombie process?
Same as the zombie process of the UNIX environment. A zombie process is a process that has finished executing and will be deleted at a later time. Why do zombie processes exist? When a process finishes it calls the exit system routine. The kernel then releases all system resources previously used by the process, but saves the exit status and process ID. The process is now in the zombie process state. The process remains a zombie process until its parent process checks the exit status and tells the kernel to completely delete the process. What are the advantages of having a message-based OS (e.g. NonStop Kernel) than a shared-memory OS (e.g.