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  1. What does the following command line signify?
    prog1|prog2
    1. It runs both the programs, pipes output of prog2 to input of prog1
    2. It runs prog1 first, prog2 second
    3. It runs prog2 first, prog1 second
    4. It runs both the programs, pipes output of prog1 to input of prog2
    5. None of these
Correct Option: D

It runs both the programs, pipes output of prog1 to input of prog2


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