A zombie process is a process whose execution is completed but it still has an entry in the process table. Zombie processes usually occur for child processes, as the parent process still needs to read its child’s exit status. Once this is done using the wait system call, the zombie process is eliminated from the process table.
the termination of child process waits until the parent process is completed after completing of parent process the child process get terminated this waiting of child process is known as zombie process.
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