LFCS PDF Dumps Real 2021 Recently Updated Questions
Released Linux Foundation LFCS Updated Questions PDF
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NEW QUESTION 112
Which of the following commands lists the dependencies of a given dpkg package?
- A. apt-cache requires package
- B. apt-cache depends-on package
- C. apt-cache dependencies package
- D. apt-cache depends package
Answer: D
NEW QUESTION 113
Each entry in a crontab must end with what character?
- A. Space
- B. Backslash
- C. Tab
- D. Newline
Answer: D
NEW QUESTION 114
CORRECT TEXT
What two character sequence is present at the beginning of an interpreted script? (Please specify the TWO correct characters only)
Answer:
Explanation:
#!
NEW QUESTION 115
Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)
- A. 169.255.0.0/16
- B. 192.168.0.0/16
- C. 172.16.0.0/12
- D. 127.0.0.0/8
- E. 10.0.0.0/8
Answer: B,C,E
NEW QUESTION 116
Which character in the password field of /etc/passwd is used to indicate that the encrypted password is stored in /etc/shadow?
- A. s
- B. x
- C. *
- D. -
Answer: B
NEW QUESTION 117
SIMULATION
Which command is used to set the hostname of the local system? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
hostname
NEW QUESTION 118
Which of the following is the device file name for the second partition on the only SCSI drive?
- A. /dev/sd0a2
- B. /dev/sd1p2
- C. /dev/hda1
- D. /dev/sda2
Answer: D
NEW QUESTION 119
In the vi editor, how can commands such as moving the cursor or copying lines into the buffer be issued multiple times or applied to multiple rows?
- A. By using the command :repeat followed by the number and the command.
- B. By issuing acommand such as :set repetition=4 which repeats every subsequent command 4 times.
- C. By selecting all affected lines using the shift and cursor keys before applying the command.
- D. By specifying the number right in front of a command such as 4l or 2yj.
Answer: D
NEW QUESTION 120
Whichof the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)
- A. init 1
- B. telinit 1
- C. shutdown -single now
- D. runlevel 1
- E. shutdown -R 1 now
Answer: A,B
NEW QUESTION 121
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. zoneinfo
- B. dnsq
- C. dig
- D. dnslookup
- E. hostname
Answer: C
NEW QUESTION 122
CORRECT TEXT
After adding a new email alias to the configuration, which command must be run in order to ensure the MTA knows about it? (Specify the command without any path but including all required parameters.)
Answer:
Explanation:
newaliases, sendmail -bi
NEW QUESTION 123
Which of the followingcommand sets the Bash variable named TEST with the content FOO?
- A. set TEST="FOO"
- B. TEST = "FOO"
- C. var TEST="FOO"
- D. TEST="FOO"
Answer: D
NEW QUESTION 124
What is the purpose of the command mailq?
- A. It is a command-line based tool for reading and writing emails.
- B. It is a multi-user mailing list manager.
- C. It fetches new emails from a remote server using POP3 or IMAP.
- D. It is a proprietary tool contained only in the qmail MTA.
- E. It queries the mail queue of the local MTA.
Answer: E
NEW QUESTION 125
What is the output of the following command?
echo "Hello World" | tr -d aieou
- A. eoo Hll Wrld
- B. Hll Wrld
- C. Hello World
- D. eoo
Answer: B
NEW QUESTION 126
Which of the following tasks can be accomplished using the command date? (Choose TWO correct answers.)
- A. Output date and time in different formats.
- B. Set the system clock.
- C. Update the time via NTP.
- D. Set the hardware clock.
- E. Synchronize the hardware and system clocks.
Answer: A,B
NEW QUESTION 127
What output will the following command produce?
seq 1 5 20
- A. 1 5 10 15
- B. 1 6 1 1 1 6
- C. 2 3 4 5
- D. 1 2 3 4
- E. 5 10 15 20
Answer: B
NEW QUESTION 128
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 script file must have the executable permission bit set.
- B. The file system on which the script resides must be mounted with the option scripts.
- C. The script file must be found in the $PATH.
- D. The script must begin with a shebang-line (#!) that points to the correct interpreter.
- E. The user issuing the command must be in the group script.
Answer: A,C,D
NEW QUESTION 129
Which of the following are init systems used within Linux systems? (Choose THREE correct answers.)
- A. Upstart
- B. SysInit
- C. startd
- D. systemd
- E. SysV init
Answer: A,D,E
NEW QUESTION 130
Which of the following parameters are used for journalctl to limit the time frame of the output? (Choose TWO correct answers.)
- A. --date=
- B. --until=
- C. --upto=
- D. --from=
- E. --since=
Answer: B,E
NEW QUESTION 131
What is true regarding TCP port 23?
- A. Port 23 is the well known port for the rlogin service which is SSL secured by default.
- B. Port 23 is the well known port for the system login services which are encrypted when the user runs the starttls command in his login shell.
- C. Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.
- D. Port 23 is the well known port for the SSH service which provides secure logins.
Answer: C
NEW QUESTION 132
What is the purpose of the Bash built-in export command?
- A. It makes the command history available to subshells.
- B. It runs a command as a process in a subshell.
- C. It sets up environment variables for applications.
- D. It shares NFS partitions for use by other systems on the network.
- E. It allows disks to be mounted remotely.
Answer: C
NEW QUESTION 133
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