LPIC-1 Multiple Select — 10 Questions

Question 1

Which TWO commands can be used to display the current runlevel of a SysV init system?

Accepted Answer

who -r. The `who -r` command displays the current runlevel and the time it was last changed, making it a valid way to check the runlevel in a SysV init system. The `runlevel` command directly outputs the previous and current runlevel, which is the standard tool for this purpose.

Answer

init 3

Answer

telinit

Answer

systemctl get-default

Question 2

Which TWO commands can be used to display information about the CPU(s) in a Linux system? (Choose two.)

Accepted Answer

cat /proc/cpuinfo. Options D and E are both correct. `cat /proc/cpuinfo` reads the virtual file /proc/cpuinfo which the kernel populates with detailed CPU information for each core, such as model name, cache size, and flags. `lscpu` is a utility that collects CPU information from /proc/cpuinfo and sysfs, presenting it in a human-readable tabular format. Both commands are standard on Linux for displaying CPU details.

Answer

uname -m

Answer

lsusb

Answer

cpufreq-info

Question 3

Which TWO tools can be used to query DNS records? (Choose two.)

Accepted Answer

nslookup. A is correct because nslookup is a classic DNS query tool that sends DNS queries to name servers to resolve domain names to IP addresses or vice versa. It directly queries DNS records (A, AAAA, MX, CNAME, etc.) using the DNS protocol (UDP/TCP port 53).

Answer

ss

Answer

ping

Answer

traceroute

Question 4

Which two commands can be used to send a test email from the command line to verify SMTP functionality? (Choose two.)

Accepted Answer

mail -s test user@example.com. The `mail` command (option C) sends an email via the local MTA, directly testing SMTP delivery. The `sendmail` command (option D) with a piped message also invokes the MTA to deliver the email, verifying SMTP functionality. Both commands rely on the system's configured MTA to handle SMTP communication.

Answer

telnet localhost 25

Answer

mutt -s test user@example.com

Answer

sendmail -bv user@example.com

Question 5

Which THREE statements are true about the sed command?

Accepted Answer

sed -i 's/foo/bar/g' file.txt replaces all occurrences of foo with bar in the file.. The `-i` flag in sed enables in-place editing, directly modifying the file rather than just outputting changes to stdout. The substitution command `'s/foo/bar/g'` replaces all occurrences of `foo` with `bar` globally on each line, and with `-i`, the changes are written back to the file.

Answer

sed 's/old/new/g' file.txt permanently changes the file.

Answer

sed uses extended regular expressions by default.

Question 6

Which TWO commands can be used to display the current firewall rules in a system using nftables? (Choose two.)

Accepted Answer

nft list ruleset. `nft list ruleset` is the primary command in nftables to display the entire ruleset, including all tables, chains, and rules, regardless of the address family. Option D is also correct because `nft list table inet filter` specifically displays the rules within the 'filter' table of the 'inet' family, which is a valid way to show a subset of the firewall rules. Both commands rely on the nftables framework, which is the modern replacement for iptables on Linux.

Answer

systemctl status nftables

Answer

iptables -L -n

Answer

firewall-cmd --list-all

Question 7

Which THREE of the following are correct features of the 'grep' command? (Choose three.)

Accepted Answer

-i makes the search case-insensitive. The `-i` flag in `grep` performs case-insensitive matching, so patterns like 'error' will match 'Error', 'ERROR', etc. This is a common requirement when searching log files where case may vary.

Answer

-l prints line numbers of matches

Answer

-r enables regular expression matching

Question 8

Which three options are valid ways to install a package 'curl' on a RHEL 8 system? (Choose three.)

Accepted Answer

`dnf install curl`. `dnf` is the default package manager on RHEL 8, replacing `yum` for handling RPM packages with automatic dependency resolution. It directly installs the `curl` package from configured repositories.

Answer

`apt-get install curl`

Answer

`zypper install curl`

Question 9

Which TWO commands are used to install packages on a Debian-based system? (Choose two.)

Accepted Answer

apt-get install. B is correct because `apt-get install` is the standard command-line tool for installing packages from Debian repositories, handling dependencies automatically. C is correct because `dpkg -i` installs a local `.deb` package file directly, though it does not resolve dependencies.

Answer

pacman -S

Answer

rpm -i

Answer

yum install

Question 10

Which TWO of the following are Debian package management tools?

Accepted Answer

dpkg. B is correct because dpkg is the core low-level package manager for Debian-based systems, handling installation, removal, and querying of .deb packages directly. D is correct because apt (Advanced Package Tool) is the high-level package management tool that resolves dependencies and retrieves packages from repositories, built on top of dpkg.

Answer

yum

Answer

rpm

Answer

zypper