[Jan-2022] LFCS Dumps PDF - LFCS Real Exam Questions Answers
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NEW QUESTION 116
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 is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.
- C. It provides the server's identity information to connecting SSH clients.
- D. It is the root key by which all user SSH keys must be signed.
- E. It authenticates any user that logs into a remote machine from the key's host.
Answer: C
NEW QUESTION 117
Which of the following commands can be used to download the RPM package kernel without installing it?
- A. yumdownloader kernel
- B. rpmdownload kernel
- C. rpm --download --package kernel
- D. yum download --no-install kernel
Answer: A
NEW QUESTION 118
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 119
How can the current directory and its subdirectories be searched for the file named MyFile.xml?
- A. grep -r MyFile.xml .
- B. grep MyFile.xml | find
- C. search Myfile.xml ./
- D. find . -name MyFile.xml
- E. less MyFile.xml
Answer: D
Explanation:
Explanation/Reference:
NEW QUESTION 120
Which of the following are syslog facilities? (Choose TWO correct answers.)
- A. postmaster
- B. advanced
- C. mail
- D. remote
- E. local7
Answer: C,E
NEW QUESTION 121
Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct answers.)
- A. IP addresses may change.
- B. The system's host name may change.
- C. Network interfaces may become active or inactive.
- D. The routing table may change.
- E. New name servers may be added to the resolver configuration.
Answer: A,C,D
NEW QUESTION 122
A user accidentally created the subdirectory \dir in his home directory. Which of the following commands will remove that directory?
- A. rmdir '~/\dir'
- B. rmdir ~/'dir'
- C. rmdir "~/\dir"
- D. rmdir ~/\\dir
- E. rmdir ~/\dir
Answer: D
NEW QUESTION 123
What is the output of the following command?
for token in a b c; do
echo -n ${token};
done
- A. $token$token$token
- B. {a}{b}{c}
- C. a b c
- D. abc
- E. anbncn
Answer: D
NEW QUESTION 124
Which of the following commands will set the variable text to olaf is home?(Choose two)
- A. text="olaf is home"
- B. $text='olaf is home'
- C. text=='olaf is home'
- D. text=$olaf is home
- E. text=olaf\ is\ home
Answer: A,E
NEW QUESTION 125
When the command echo $$ outputs 12942, what is the meaning of 12942?
- A. It is the process ID of the last command which has been placed in the background.
- B. It is the process ID of the echo command.
- C. It is the process ID of the current shell.
- D. It is the process ID of the last command executed.
Answer: C
NEW QUESTION 126
Regarding the command:
nice -5 /usr/bin/prog
Which of the following statements is correct?
- A. /usr/bin/prog is executed with a priority of -5.
- B. /usr/bin/prog is executed with a nice level of 5.
- C. /usr/bin/prog is executed with a nice level of -5.
- D. /usr/bin/prog is executed with a priority of 5.
Answer: B
Explanation:
Explanation
NEW QUESTION 127
What is the purpose of the nsswitch.conf file?
- A. It is used to configure which network services will be turned on during the next system boot.
- B. It is used to configure where the C library looks for system information such as host names and user passwords.
- C. It is used to configure LDAP authentication services for the local system.
- D. It is used to configure network protocol port numbers such as for HTTP or SMTP.
Answer: B
NEW QUESTION 128
Where are user specific crontabs stored?
- A. As individual per-user files in /etc/cron.user.d.
- B. In the .crontab file in the user's home directory.
- C. As individual per-user files within /var/spool/cron.
- D. In the database file /etc/crontab.db which is shared by all users.
- E. In the file /var/cron/user-crontab which is shared by all users.
Answer: C
NEW QUESTION 129
Which of the following is correct when talking about mountpoints?
- A. Files within a directory are deleted when the directory is used as a mount point.
- B. Every existing directory can be used as a mount point.
- C. Directories need to have the SetUID flag set to be used as a mount point.
- D. Only empty directories can be used as a mount point.
Answer: B
NEW QUESTION 130
Which of the following file permissions belong to a symbolic link?
- A. -rwxrwxrwx
- B. lrwxrwxrwx
- C. +rwxrwxrwx
- D. srwxrwxrwx
Answer: B
NEW QUESTION 131
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 132
Which of the following options for the kernel's command line changes the systemd boot target to rescue.target instead of the default target?
- A. systemd.service=rescue.target
- B. systemd.runlevel=rescue.target
- C. systemd.unit=rescue.target
- D. systemd.default=rescue.target
- E. systemd.target=rescue.target
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION 133
CORRECT TEXT
What word is missing from the following SQL statement?
__________ count(*) from tablename;
(Please specify the missing word using lower-case letters only.)
Answer:
Explanation:
select
NEW QUESTION 134
CORRECT TEXT
What word is missing from the following SQL statement?
insert into tablename ________(909, 'text');
(Please specify the missing word using lower-case letters only.)
Answer:
Explanation:
VALUES,
values
NEW QUESTION 135
CORRECT TEXT
What command displays all aliases defined in the current shell? (Specify the command without any path information)
Answer:
Explanation:
alias, alias -p
NEW QUESTION 136
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 is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.
- C. It provides the server's identity information to connecting SSH clients.
- D. It is the root key by which all user SSH keys must be signed.
- E. It authenticates any user that logs into a remote machine from the key's host.
Answer: C
NEW QUESTION 137
CORRECT TEXT
Which port is the default server port for the HTTPS protocol? (Specify the port number using digits.)
Answer:
Explanation:
443
NEW QUESTION 138
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 139
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 140
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