102-400 Online Practice Questions and Answers

Which parameter must be passed to ifconfig to activate a previously inactive network interface? (Specify the parameter only without any command, path or additional options)

With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)

The presence of what file will temporarily prevent all users except root from logging into the system? (Specify the full name of the file, including path.)

Which directory holds the files that configure the xinetd service when using several configuration files instead of an integrated configuration file? (Specify the full path to the directory.)

Which file lists which users can execute commands using sudo? (Specify the full name of the file, including path.)

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.

Which character in the password field of /etc/passwd is used to indicate that the encrypted password is stored in /etc/shadow?

A. *

B.

C. s

D. x

Which of the following tasks can be accomplished using the command date? (Choose TWO correct answers.)

A. Synchronize the hardware and system clocks.

B. Output date and time in different formats.

C. Set the system clock.

D. Set the hardware clock.

E. Update the time via NTP.

Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct answers.)

A. 2001:db8::15 www.example.com www

B. www.example.com www 203.0.13.15

C. 203.0.113.15 www.example.com www

D. www.example.com,www 203.0.13.15,2001:db8::15

E. 2003.0.113.15,2001:db8::15 www.example.com www

Which of the following commands can be used to limit the amount of memory a user may use?

A. umask

B. usermod

C. ulimit

D. passwd

E. chage