UNIX Operating System Question:
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Predict the output of the following program code in UNIX?


printf("Hello World!");
Hello World!Hello World!
The fork creates a child that is a duplicate of the parent process. The child begins from the fork().All the statements after the call to fork() will be executed twice.(once by the parent process and other by child). The statement before fork() is executed only by the parent process.

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Explain UNIX fork() system call.Predict the output of the following program code?