Linux Foundation Linux Foundation Certified SYSADMIN LFCS Questions & Answers

• Question 41:

  What does the ? symbol within regular expressions represent?

  A. Match the preceding qualifier one or more times.

  B. Match the preceding qualifier zero or more times.

  C. Matchthe preceding qualifier zero or one times.

  D. Match a literal ? character.

  Correct Answer: C

• Question 42:

  What word is missing from the following SQL statement?

  __________ count(*) from tablename;

  (Please specify the missing word using lower-case letters only.)

  A. select

  Correct Answer: A

• Question 43:

  What is the purpose of the nsswitch.conf file?

  A. It is used to configure where the C library looks for system information such as host names and user passwords.

  B. It is used to configure network protocol port numbers such as for HTTP or SMTP.

  C. It is used to configure LDAP authentication services for the local system.

  D. It is used to configure which network services will be turned on during the next system boot.

  Correct Answer: A

• Question 44:

  Which Bash environment variable defines in which file the user history is stored when exiting a Bash process? (Specify ONLY the variable name.)

  A. HISTFILE

  Correct Answer: A

• Question 45:

  Which command can be used to investigate the properties for a particular window in X by clicking that window? (Specify ONLY the command without any path or parameters.)

  A. /usr/bin/xwininfo, xwininfo

  Correct Answer: A

• Question 46:

  What of the following can be done by the command ifconfig? (Choose TWO correct answers.)

  A. Set a network interface active or inactive.

  B. Specify the kernel module to be used with a network interface.

  C. Allow regular users to change the network configuration of a network interface.

  D. Change the netmask used on a network interface.

  E. Specify which network services are available on a network interface.

  Correct Answer: AD

• Question 47:

  How many fields are in a syntactically correct line of /etc/fstab?

  A. 3

  B. 4

  C. 5

  D. 6

  E. 7

  Correct Answer: D

• Question 48:

  Which of the following commands can be used to download the RPM package kernel without installing it?

  A. yum download --no-install kernel

  B. yumdownloader kernel

  C. rpm --download --package kernel

  D. rpmdownload kernel

  Correct Answer: B

• Question 49:

  Which character, added to the end of a command, runs that command in the background as a child process of the current shell?

  A. !

  B. +

  C. and

  D. %

  E. #

  Correct Answer: C

• Question 50:

  Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the keyboard?

  A. SIGTERM

  B. SIGINT

  C. SIGSTOP

  D. SIGKILL

  Correct Answer: B