Linux Foundation Linux Foundation Certified SYSADMIN LFCS Questions & Answers

• Question 251:

  Which of the following commands lists all defined variables and functions within Bash?

  A. env

  B. set

  C. env -a

  D. echo $ENV

  Correct Answer: B

• Question 252:

  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.

  Correct Answer: B

• Question 253:

  Which of the following is observed and corrected by a NTP client?

  A. The skew in time between the system clock and the hardware clock.

  B. The skew in time between the system clock and the reference clock.

  C. Changes in the time zone of the current computer's location.

  D. Adjustments needed to support Daylight Saving Time.

  Correct Answer: B

• Question 254:

  Which of the following information is stored within the BIOS? (Choose TWO correct answers.)

  A. Boot device order

  B. Linux kernel version

  C. Timezone

  D. Hardware configuration

  E. The system's hostname

  Correct Answer: AD

• Question 255:

  By default, the contents of which directory will be copied to a new user's home directory when the account is created by passing the -m option to the useradd command? (Specify the full path to the directory.)

  A. /etc/skel

  Correct Answer: A

• Question 256:

  Which function key is used to start Safe Mode in Windows NT?

  A. F10

  B. F8

  C. F6

  D. Windows NT does not support Safe Mode

  Correct Answer: D

• Question 257:

  After successfully creating a hard link called bar to the ordinary file foo, foo is deleted from the filesystem. Which of the following describes the resulting situation?

  A. foo and bar would both be removed.

  B. foo would be removed while bar would remain accessible.

  C. foo would be removed. bar would still exist but would be unusable.

  D. Both foo and bar would remain accessible.

  E. The user is prompted whether bar should be removed, too.

  Correct Answer: B

• Question 258:

  Which of the following commands shows the definition of a given shell command?

  A. where

  B. stat

  C. type

  D. case

  Correct Answer: C

• Question 259:

  On a Linux system with shadow passwords enabled, which file in the file system contains the password hashes of all local users? (Specify the full name of the file, including path.)

  A. /etc/shadow

  Correct Answer: A

• Question 260:

  Which of the following commands reboots the system when using SysV init? (Choose TWO correct answers.)

  A. shutdown -r now

  B. shutdown -r "rebooting"

  C. telinit 6

  D. telinit 0

  E. shutdown -k now "rebooting"

  Correct Answer: AC