Q. The output of ls -l for /etc/passwd and /usr/bin/passwd is as follows?
If a user not belonging to the “root” group and executes the passwd command to try to change his password, which of the following is true?
A. Changing password fails because the user is not allowed to update the /etc/passwd file
B. Changing password successfully because the program runs as root
C. The program that change password runs in kernel mode where it’s possible to write in /etc/passwd file
D. /etc/passwd is a special file and the default system allows all users to update it