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Gopal Sharma • 38.32K Points
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Q. If one doesn't want anyone else to read or write to a file named datfile, except through a program in a file filex , then he may use

  • (A) chmod u+s filex ; chmod go_rw datfile
  • (B) chmod 4711 filex ; chmod go_rw datfile
  • (C) chmod 4711 datfile ; chmod go_rw filex
  • (D) both (a) and (b)
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