Question 1

Which of the following parameters are used for journalctl to limit the time frame of the output? (Choose TWO correct choices.)
A) --from=
B) --since=
C) --until=
D) --upto=
E) --date=

Accepted Answer

The answer of Which of the following parameters are used...

Question 2

Which of the following details is NOT provided in any output from the netstat utility?
A) broadcast services
B) interface statistics
C) masquerading connections
D) network connections
E) routing tables

Accepted Answer

The answer of Which of the following details is NOT...

Question 3

Which of the following is true about IPv6?
A) With IPv6, the TCP port numbers of most services have changed.
B) IPv6 no longer supports broadcast addresses.
C) IPv4 addresses can be used without any change with IPv6.
D) IPv6 no longer supports multicast addresses.
E) For IPv6, UDP and TCP have been replaced by the Rapid Transmission Protocol RTP.

Accepted Answer

IPv6 does not use broadcast addresses; instead, it uses multicast and anycast addressing.

Question 4

Which of the following commands will help identify a broken router between the local and the remote machine?
A) ps
B) netstat
C) nslookup
D) ifconfig
E) traceroute

Accepted Answer

The answer of Which of the following commands will help...

Question 5

Which of the following is a legacy program provided by CUPS for sending files to the printer queues on the command line?
A) lpd
B) lpp
C) lpq
D) lpr

Accepted Answer

The 'lpr' command is a legacy program provided by CUPS for sending files to printer queues from the command line.

Question 6

Which of the following statements is valid in the file /etc/nsswitch.conf?
A) multi on
B) 192.168.168.4 dns-server
C) hosts: files dns
D) include /etc/nsswitch.d/

Accepted Answer

The statement "hosts: files dns" is a valid entry in the /etc/nsswitch.conf file, which specifies the order of services used to resolve hostnames.

Question 7

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.

Accepted Answer

The nsswitch.conf file is used to configure the sources from which the C library retrieves system information like host names, user passwords, and other network-related data.

Question 8

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) When a default route is set, all other routes are disabled until the default route is deleted.
C) The default route is only used if there is not a more specific route to a destination host or network.
D) Without a default route, no network communication even in directly attached networks is possible.

Accepted Answer

The default route is used when there is no more specific route available for a destination. It acts as a catch-all route.

Question 9

Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct choices.)
A) New name servers may be added to the resolver configuration.
B) Network interfaces may become active or inactive.
C) The routing table may change.
D) IP addresses may change.
E) The system's host name may change.

Accepted Answer

The ifconfig command is used to configure network interfaces, which can activate or deactivate them (B), change IP addresses (D), and potentially alter the routing table (C) as a result of these changes. It does not affect name servers or the system's host name.

Question 10

What is true about the ntpdate command?
A) It is the primary management command for the NTP time server.
B) It updates the local system's date (i.e. day, month and year) but not the time (i.e. hours, minutes, seconds).
C) It queries one or more NTP time servers and adjusts the system time accordingly.
D) It sends the local system time to one or many remote NTP time servers for redistribution.
E) It can be used by any user to set the user clock independently of the system clock.

Accepted Answer

The ntpdate command queries NTP servers to adjust the local system time to match the correct time.

Question 11

Which of the following is observed and corrected by a NTP client?
A) The skew in time between the system clock and the hardware clock.
B) The skew in time between the system clock and the reference clock.
C) Changes in the time zone of the current computer's location.
D) Adjustments needed to support Daylight Saving Time.

Accepted Answer

NTP (Network Time Protocol) clients correct the skew in time between the system clock and a reference clock, ensuring accurate time synchronization across devices.

Question 12

Which of the following are syslog facilities? (Choose TWO correct choices.)
A) local7
B) mail
C) advanced
D) postmaster
E) remote

Accepted Answer

Local7 and mail are standard syslog facilities used for logging different types of system messages.

Question 13

Why is the correct configuration of a system's time zone important?
A) Because the conversion of Unix timestamps to local time relies on the time zone configuration.
B) Because the time zone is saved as part of the modification times of files and cannot be changed after a file is created.
C) Because the environment variables LANG and LC_MESSAGES are, by default, set according to the time zone.
D) Because NTP chooses servers nearby based on the configured time zone.

Accepted Answer

The conversion of Unix timestamps to local time relies on the time zone configuration to accurately reflect the local time.

Question 14

Which file inside the CUPS configuration directory contains the definition of the printers?
A) cups-devices.conf
B) snmp.conf
C) printcap.conf
D) printers.conf
E) cupsd.conf

Accepted Answer

The file "printers.conf" inside the CUPS configuration directory contains the definitions and configurations of the printers.

Question 15

Which of the following commands can be used to display the local routing table? (Choose TWO correct choices.)
A) ifconfig
B) dig
C) netstat
D) route
E) trackroute

Accepted Answer

The answer of Which of the following commands can be...

Question 16

Which of the following are commonly used Mail Transfer Agent (MTA) applications? (Choose THREE correct choices.)
A) Postfix
B) Procmail
C) Sendmail
D) Exim
E) SMTPd

Accepted Answer

Postfix, Sendmail, and Exim are commonly used Mail Transfer Agent (MTA) applications.

Question 17

Which of the following keywords can be used in the file /etc/nsswitch.conf to specify a source for host name lookups? (Choose TWO correct choices.)
A) resolv
B) dns
C) remote
D) files
E) hosts

Accepted Answer

The keywords "dns" and "files" are used in /etc/nsswitch.conf to specify sources for hostname lookups. "dns" refers to querying DNS servers, while "files" refers to using local files like /etc/hosts.

Question 18

Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct choices.)
A) 2001:db8::15                www.example.com  www
B) www.example.com                  www         203.0.13.15
C) 203.0.113.15                www.example.com  www
D) www.example.com,www              203.0.13.15,2001:db8::15
E) 2003.0.113.15,2001:db8::15  www.example.com  www

Accepted Answer

The answer of Which of the following lines are valid...

Question 19

What is true regarding TCP port 23?
A) Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.
B) Port 23 is the well known port for the SSH service which provides secure logins.
C) Port 23 is the well known port for the rlogin service which is SSL secured by default.
D) 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.

Accepted Answer

Port 23 is the well-known port for the telnet service, which is a plain text protocol and is considered insecure because it does not encrypt data.

Question 20

Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct choices.)
A) 127.0.0.0/8
B) 10.0.0.0/8
C) 169.255.0.0/16
D) 172.16.0.0/12
E) 192.168.0.0/16

Accepted Answer

These are the three private IPv4 address ranges reserved by IANA for private address assignment and private routing.

Exam 1: Linux Foundation Certified System Administrator

Which of the following parameters are used for journalctl to limit the time frame of the output? (Choose TWO correct choices.)

Which of the following details is NOT provided in any output from the netstat utility?

Which of the following is true about IPv6?

Which of the following commands will help identify a broken router between the local and the remote machine?

Which of the following is a legacy program provided by CUPS for sending files to the printer queues on the command line?

Which of the following statements is valid in the file /etc/nsswitch.conf?

What is the purpose of the nsswitch.conf file?

What is true regarding a default route?

Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct choices.)

What is true about the ntpdate command?

Which of the following is observed and corrected by a NTP client?

Which of the following are syslog facilities? (Choose TWO correct choices.)

Why is the correct configuration of a system's time zone important?

Which file inside the CUPS configuration directory contains the definition of the printers?

Which of the following commands can be used to display the local routing table? (Choose TWO correct choices.)

Which of the following are commonly used Mail Transfer Agent (MTA) applications? (Choose THREE correct choices.)

Which of the following keywords can be used in the file /etc/nsswitch.conf to specify a source for host name lookups? (Choose TWO correct choices.)

Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct choices.)

What is true regarding TCP port 23?

Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct choices.)