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Q51. - (Topic 2)
How is a display manager started?
A. It is started by a user using the command startx.
B. It is started like any other system service by the init system.
C. It is started by inetd when a remote hosts connects to the X11 port.
D. It is started automatically when a X11 user logs in to the system console.
Q52. - (Topic 3)
To prevent a specific user from scheduling tasks with at, what should the administrator do?
A. Add the specific user to /etc/at.allow file.
B. Add the specific user to [deny] section in the /etc/atd.conf file.
C. Add the specific user to /etc/at.deny file.
D. Add the specific user to nojobs group.
E. Run the following: atd --deny [user].
Q53. - (Topic 5)
Which of the following is true about IPv6?
A. With IPv6, the TCP port numbers of most services have changed.
B. IPv6 no longer supports broadcast addresses.
C. IPv4 addresses can be used without any change with IPv6.
D. IPv6 no longer supports multicast addresses.
E. For IPv6, UDP and TCP have been replaced by the Rapid Transmission Protocol RTP.
Q54. - (Topic 6)
What is a purpose of an SSH host key?
A. It must be sent by any SSH client in addition to a user key in order to identify the client's host.
B. It provides the server's identity information to connecting SSH clients.
C. It is the root key by which all user SSH keys must be signed.
D. It authenticates any user that logs into a remote machine from the key's host.
E. It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.
Q55. - (Topic 1)
Which of the following are requirements in order to run a shell script like a regular command from anywhere in the filesystem? (Choose THREE correct answers.)
A. The user issuing the command must be in the group script.
B. The script file must be found in the $PATH.
C. The script file must have the executable permission bit set.
D. The script must begin with a shebang-line (#!) that points to the correct interpreter.
E. The file system on which the script resides must be mounted with the option scripts.
Q56. - (Topic 6)
Which of the following programs uses the hosts.allow file to perform its main task of checking for access control restrictions to system services?
Q57. - (Topic 5)
Which of the following tools used for DNS debugging, reports not only the response from the name server but also details about the query?
Q58. - (Topic 4)
Which of the following commands is used to rotate, compress, and mail system logs?
C. syslogd --rotate
Q59. - (Topic 1)
What is the difference between the commands test -e path and test -f path?
A. They are equivalent options with the same behaviour.
B. The -f option tests for a regular file. The -e option tests for an empty file.
C. Both options check the existence of the path. The -f option also confirms that it is a regular file.
D. The -f option tests for a regular file. The -e option tests for an executable file.
Q60. - (Topic 5)
What is the command to delete the default gateway from the system IP routing table? (Choose TWO correct answers.)
A. route del default
B. ifconfig unset default
C. netstat -r default
D. ip route del default
E. sysctl ipv4.default_gw=0