Best Preparations of LFCS Exam 2023 Linux Foundation Certified Unlimited 260 Questions
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What is the duration, language, and format of LFCS Exam
Format: Multiple choices, multiple answers
- Language: English
- Length of Examination: 2 Hours
- Number of Questions: 260
- Passing score: 66%
NEW QUESTION 23
Which of the following tools used for DNS debugging, reports not only the response from the name server but also details about the query?
- A. hostname
- B. zoneinfo
- C. dnsq
- D. dig
- E. dnslookup
Answer: D
NEW QUESTION 24
What of the following statements are true regarding /dev/ when using udev? (Choose TWO correct answers.)
- A. When using udev, it is not possible to create block or character devices in /dev/ using mknod.
- B. Additional rules for udev can be created by adding them to /etc/udev/rules.d/.
- C. The content of /dev/ is stored in /etc/udev/dev and is restored during system startup.
- D. The /dev/ directory is a filesystem of type tmpfs andis mounted by udev during system startup.
- E. Entries for all possible devices get created on boot even if those devicesare not connected.
Answer: B,D
NEW QUESTION 25
Which command will display the last line of the file foo.txt?
- A. last -n 1 foo.txt
- B. tail -n 1 foo.txt
- C. head -n 1 foo.txt
- D. tail foo.txt
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION 26
Which of the following commands shows the definition of a given shell command?
- A. where
- B. type
- C. stat
- D. case
Answer: B
NEW QUESTION 27
What is a purpose of an SSH host key?
- A. It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.
- B. It must be sent by any SSH client in addition to a user key in order to identify the client's host.
- C. It authenticates any user that logs into a remote machine from the key's host.
- D. It is the root key by which all user SSH keys must be signed.
- E. It provides the server's identity information to connecting SSH clients.
Answer: E
NEW QUESTION 28
Which RPM command will output the name of the package which supplied the file /etc/exports?
- A. rpm -qf /etc/exports
- B. rpm -F /etc/exports
- C. rpm -qi /etc/exports
- D. rpm -Kl /etc/exports
- E. rpm -qp /etc/exports
Answer: A
NEW QUESTION 29
Which of the following programs uses the hosts.allow file to perform its main task of checking for access control restrictions to system services?
- A. xinetd
- B. mountd
- C. inetd
- D. tcpd
- E. fingerd
Answer: D
NEW QUESTION 30
Which of the following commands prints a listof usernames (first column) and their primary group (fourth column) from the /etc/passwd file?
- A. split -c 1,4 /etc/passwd
- B. cut -d : -f 1,4 /etc/passwd
- C. paste -f 1,4 /etc/passwd
- D. fmt -f 1,4 /etc/passwd
Answer: B
NEW QUESTION 31
SIMULATION
Which file contains a set of services and hosts that will be allowed to connect to the server by going through a TCP Wrapper program such as tcpd? (Specify the full name of the file, including path.)
Answer:
Explanation:
/etc/hosts.allow
NEW QUESTION 32
Which of the following options is used in a GRUB Legacy configuration file to define the amount of time that the GRUB menu will be shown to the user?
- A. showmenu
- B. timeout
- C. splash
- D. hidemenu
Answer: B
NEW QUESTION 33
In case neither cron.allow nor cron.deny exist in /etc/, which of the following is true?
- A. Without additional configuration, all users may have user specific crontabs.
- B. Without additional configuration, no users may have user specific crontabs.
- C. When a user creates a user specific crontab the system administrator must approve it explicitly.
- D. The cron daemon will refuse to start and report missing files in the system's logfile.
Answer: B
NEW QUESTION 34
Regarding the command: nice -5 /usr/bin/prog
Which of the following statements is correct?
- A. /usr/bin/prog is executed with a nice level of -5.
- B. /usr/bin/prog is executed with a priority of -5.
- C. /usr/bin/prog is executed with a priority of 5.
- D. /usr/bin/prog is executed with a nice level of 5.
Answer: D
NEW QUESTION 35
Which of the following is the device file name for the second partition on the only SCSI drive?
- A. /dev/hda1
- B. /dev/sd0a2
- C. /dev/sda2
- D. /dev/sd1p2
Answer: C
NEW QUESTION 36
Which of the following commands preloads and manages keys that are used for automatic authentication while logging in to other machines using SSH?
- A. sshd
- B. ssh-add
- C. ssh-agent
- D. ssh-keygen
Answer: C
NEW QUESTION 37
CORRECT TEXT
Which command will disable swapping on a device? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
swapoff, /sbin/swapoff
NEW QUESTION 38
CORRECT TEXT
Which command is used to add an empty group to the system? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
groupadd, /usr/sbin/groupadd
NEW QUESTION 39
Which of the following is a valid IPv6 address?
- A. 2001::db8:4581::1
- B. 2001:db8:3241::1
- C. 2001:db8:0g41::1
- D. 2001%db8%9990%%1
- E. 2001.db8.819f..1
Answer: B
NEW QUESTION 40
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