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 (Solved)
1. chmod u+s filex ; chmod go_rw datfile
2. chmod 4711 filex ; chmod go_rw datfile
3. chmod 4711 datfile ; chmod go_rw filex
4. both (a) and (b)
- d. both (a) and (b)