An innvalid user id.

The id of the super user.

The id of a user when the user’s account is deleted.

None of the mentioned.

Owner can read and write; group can write and execute; other can read.

None of the mentioned.

Owner can read and write; group can write; other can read.

Owner can read and write; group can read; other can read.

Owner can read and execute; group can read and write; other can execute

/etc/tab

/etc/proc/

None of the mentioned.

/mnt

/etc/fstab

ipchains

None of the mentioned.

pf

iftables

ipfw