Linux Foundation New 2021 LFCS Sample Questions Reliable LFCS Test Engine
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Topics of LFCS Exam
Candidates must know the exam topics before they start of preparation. Because, it will really help them in hitting the core. Our LFCS dumps will include the following topics:
- Networking
- Operation of Running Systems
- Essential Commands
- User and Group Management
- Storage Management
- Service Configuration
NEW QUESTION 105
What is true regarding the command userdel --force --remove bob? (Choose TWO correct answers.)
- A. The user bob's home directory is removed.
- B. All files owned by bob are remove from all mounted filesystems.
- C. In case bob was the last member of a group, that group is deleted.
- D. The user bob is removed from the system's user database.
- E. The locate database is updated to drop files owned by bob.
Answer: A,D
NEW QUESTION 106
Which of the following is true about IPv6?
- A. IPv4 addresses can be used without any change with IPv6.
- B. IPv6 no longer supports multicast addresses.
- C. IPv6 no longer supports broadcast addresses.
- D. For IPv6, UDP and TCP have been replaced by the Rapid Transmission Protocol RTP.
- E. With IPv6, the TCP port numbers of most services have changed.
Answer: C
NEW QUESTION 107
What is true regarding the command sendmail?
- A. It is only available when the sendmail MTA is installed.
- B. The sendmail command prints the MTAs queue history of which mails have been sent successfully.
- C. All MTAs, including Postfix and Exim, provide a sendmail command.
- D. With any MTA, the sendmail command must be run periodically by the cron daemon.
Answer: C
NEW QUESTION 108
How many fields are in a syntactically correct line of /etc/fstab?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: D
Explanation:
Explanation
NEW QUESTION 109
Which of the following files, located in the user home directory, is used to store the Bash history?
- A. .bashrc_history
- B. .history_bash
- C. .bash_histfile
- D. .history
- E. .bash_history
Answer: E
Explanation:
Explanation
NEW QUESTION 110
What is the output of the following command sequence?
for token in a b c; do
echo -n "$token ";
done
- A. abc
- B. token token token
- C. a b c
- D. anbncn
- E. "a " "b " "c "
Answer: C
NEW QUESTION 111
The output of the program date should be saved in the variable actdat. What is the correct statement?
- A. actdat=`date`
- B. date | actdat
- C. date > $actdat
- D. set actdat='date'
- E. actdat=date
Answer: A
NEW QUESTION 112
Which of the following fields are available in both the global /etc/crontab file as well as in user-specific crontab files? (Select TWO correct answers)
- A. Minute
- B. Username
- C. Year
- D. Command
Answer: A,D
NEW QUESTION 113
Which of the following commands can remove a user from a group?
- A. grouprm
- B. groupmod
- C. usermod
- D. usergroups
- E. passwd
Answer: C
NEW QUESTION 114
CORRECT TEXT
Which keyword must be listed in the hosts option of the Name Service Switch configuration file in order to make host lookups consult the /etc/hosts file?
Answer:
Explanation:
files
NEW QUESTION 115
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 116
CORRECT TEXT
Which file in the /proc filesystem lists parameters passed from the bootloader to the kernel? (Specify the file name only without any path.)
Answer:
Explanation:
cmdline, /proc/cmdline
NEW QUESTION 117
What does the ? symbol within regular expressions represent?
- A. Matchthe preceding qualifier zero or one times.
- B. Match the preceding qualifier one or more times.
- C. Match the preceding qualifier zero or more times.
- D. Match a literal ? character.
Answer: A
NEW QUESTION 118
Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?
- A. chmod 577 /bin/foo
- B. chmod o+rwx,a+rx /bin/foo
- C. chmod u=rwx,go=rx /bin/foo
- D. chmod 775 /bin/foo
Answer: C
NEW QUESTION 119
What is true regarding a default route?
- A. The default route is always used first. When the default route is not available more specific routes are tried.
- B. Without a default route, no network communication even in directly attached networks is possible.
- C. The default route is only used if there is not a more specific route to a destination host or network.
- D. When a default route is set, all other routes are disabled until the default route is deleted.
Answer: C
NEW QUESTION 120
Which of the following files, located in the user home directory, is used to store the Bash history?
- A. .bashrc_history
- B. .history_bash
- C. .bash_histfile
- D. .history
- E. .bash_history
Answer: E
NEW QUESTION 121
CORRECT TEXT
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 122
Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the keyboard?
- A. SIGINT
- B. SIGKILL
- C. SIGSTOP
- D. SIGTERM
Answer: A
NEW QUESTION 123
Which configuration file would be edited to change default options for the OpenSSH server?
- A. /etc/ssh/ssh_server
- B. /etc/ssh/sshd_config
- C. /etc/ssh/ssh
- D. /etc/ssh/server
- E. /etc/ssh/ssh_config
Answer: B
NEW QUESTION 124
Given the following routing table:
How would an outgoing packet to the destination 192.168.2.150 be handled?
- A. It would be passed to the default router 255.255.255.0 on eth0.
- B. It would be directly transmitted on the device eth0.
- C. It would be passed to the router 192.168.1.1 on eth0.
- D. It would be directly transmitted on the device wlan0.
- E. It would be passed to the default router 192.168.178.1 on wlan0.
Answer: C
NEW QUESTION 125
Which file used by XDM specifies the default wallpaper?
- A. /etc/X11/defaults.conf
- B. /etc/X11/xdm/Xsetup
- C. /etc/X11/xdm/Defaults
- D. /etc/X11/xdm.conf
Answer: B
NEW QUESTION 126
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 127
When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 128
What does the symbol within regular expressions represent?
- A. Match the preceding qualifier zero or one times.
- B. Match the preceding qualifier one or more times.
- C. Match the preceding qualifier zero or more times.
- D. Match a literal character.
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION 129
What is NOT contained in the locale setting of the operating system?
- A. timezone
- B. currency symbol
- C. language
- D. thousands separator
Answer: A
NEW QUESTION 130
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