Linux Makefile Question: Download Makefile PDF

The command chmod 4777 a.out:
a) will set the suid bit of a.out
b) will set the suid bit of a.out only if the command is issued by root
c) is not a valid command
d) will set the sticky bit of a.out

a) will set the suid bit of a.out

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What does chmod +t do? a) wrong syntax b) set effective userid for filename c) set effective groupid for filename d) set the sticky bit	Which of the following umask settings allow execute permission to be set by default on regular files? a) 222 b) 111 c) 000 d) None of the given choices