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26 January, 12:52

Choose the correct statement about the UNIX family of operating systems:

a. Because files can be shared across fork () and exec () calls, I/O redirection can be done via files

b. Because files cannot be shared across an exec () call, I/O redirection is done via pipes, sockets, etc.

c. Because files cannot be shared across a fork () call, I/O redirection is done via pipes, sockets, etc.

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  1. 26 January, 15:29
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    The Answer is-

    A. Because files can be shared across fork () and exec () calls, I/O redirection can be done via files

    Explanation:

    When the Unix OS calls the fork then process in the parent can wait and exec () in the child process. Unix shell provides Input/Output direction to the calls between the fork () and exec (). exec () can restore the current program process. fork () clones the current process data and then open the file content.
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