Process Model and IPC interview questions


Total available count: 17
Subject - Operating System
Subsubject - Process Model and IPC

What is a zombie?

When a program forks and the child finishes before the parent, the kernel still keeps some of its information about the child in case the parent might need it - for example, the parent may need to check the child's exit status. To be able to get this information, the parent calls `wait()'; In the interval between the child terminating and the parent calling `wait()', the child is said to be a `zombie' (If you do `ps', the child will have a `Z' in its status field to indicate this).




Next 2 interview question(s)

1
What is IPC? What are the various schemes available?
2
What is ps command for?


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