LPIC-1 Administrative Tasks Practice Test 3 — 15 Questions

Question 1

Refer to the exhibit. During the next boot, which filesystem will be checked first by fsck?

Accepted Answer

/dev/sda1. The order in which fsck checks filesystems during boot is determined by the pass number (field 6) in /etc/fstab. The filesystem with the lowest pass number is checked first. In the exhibit, /dev/sda1 has a pass number of 1, while /dev/sda2 and /dev/sda3 have pass numbers of 2, so /dev/sda1 will be checked first.

Answer

All checked in parallel

Answer

/dev/sda2

Answer

/dev/sda3

Question 2

Refer to the exhibit. The administrator restarts the sshd service. What is the new main PID after restart?

Accepted Answer

It will be a new, different PID.. When the sshd service is restarted, the old process is terminated and a new process is spawned, resulting in a new main PID. The PID is a unique identifier assigned by the kernel to each process at creation time, and it is never reused immediately after termination. Therefore, the new main PID will be different from the previous one.

Answer

It remains the same.

Answer

1235

Answer

1234

Question 3

An administrator wants to run a shell script every day at 2:00 AM. Which command should be used to edit the user's personal crontab?

Accepted Answer

crontab -e. The correct command to edit a user's personal crontab is `crontab -e`. This invokes the default text editor (as defined by the EDITOR or VISUAL environment variable) on the user's crontab file, ensuring proper syntax validation and locking to prevent concurrent edits. It is the standard and recommended way to modify cron jobs for the current user.

Answer

crontab -l

Answer

at 2:00 AM

Answer

vi /var/spool/cron/crontabs/username

Question 4

A system is not logging messages to /var/log/syslog. Which command should an administrator use first to diagnose the issue?

Accepted Answer

systemctl status rsyslog. Option D is correct because the first step in diagnosing why messages are not appearing in /var/log/syslog is to verify that the rsyslog service is running and active. The 'systemctl status rsyslog' command shows the current service state, recent logs, and any errors that might prevent logging. Without confirming the service status, other diagnostic steps may be misleading.

Answer

tail -f /var/log/syslog

Answer

logger test

Answer

ps aux | grep syslog

Question 5

A user 'jdoe' already exists. The administrator needs to add 'jdoe' to the 'staff' and 'admin' groups without changing other group memberships. Which command accomplishes this?

Accepted Answer

usermod -a -G staff,admin jdoe. Option A is correct because the `usermod -a -G` command appends the user 'jdoe' to the supplementary groups 'staff' and 'admin' without altering existing group memberships. The `-a` (append) flag is essential; without it, `-G` would replace all current supplementary groups with only those listed. This matches the requirement to add the user to new groups while preserving other group memberships.

Answer

sed -i 's/^staff:.*/&jdoe/' /etc/group

Answer

usermod -G staff,admin jdoe

Answer

useradd -G staff,admin jdoe

Question 6

To enable disk quotas for user quotas on a filesystem, which line should be added to /etc/fstab's mount options?

Accepted Answer

usrquota. Option D is correct because the 'usrquota' mount option is the standard Linux kernel parameter used to enable user disk quotas on a filesystem. When added to the fourth field of an /etc/fstab entry, it instructs the kernel to track per-user disk usage, allowing the quota system (via quotacheck, edquota, etc.) to enforce limits.

Answer

grpquota

Answer

userquota

Answer

quota

Question 7

A zombie process appears in the process list. The parent process has PID 1234. Which command will most likely remove the zombie?

Accepted Answer

kill -9 1234. A zombie process is a child process that has terminated but whose exit status has not been read by its parent. The zombie cannot be killed directly because it is already dead; it only remains in the process table until the parent calls wait(). Sending SIGKILL (kill -9) to the parent process (PID 1234) causes the parent to terminate, and the zombie child is then adopted by init (PID 1), which automatically reaps it by calling wait().

Answer

kill -9 <zombie_pid>

Answer

wait <zombie_pid>

Answer

reboot

Question 8

A user can successfully ping a web server but cannot access the website via a browser. Which is the most likely cause?

Accepted Answer

Web service (e.g., Apache) not running. B is correct because the user can successfully ping the web server, confirming that the server is reachable at the network layer (ICMP). However, the inability to access the website via a browser indicates that the application layer service handling HTTP/HTTPS requests is not running. If the web service (e.g., Apache, Nginx) is stopped or crashed, the server will not respond to TCP port 80 or 443, even though basic connectivity exists.

Answer

Incorrect subnet mask

Answer

Firewall blocking HTTP ports

Answer

DNS resolution failure

Question 9

Which command schedules a job to run once at 2:30 PM today?

Accepted Answer

at 14:30. The `at` command schedules a one-time job for a specified time. The correct syntax uses a colon (:) to separate hours and minutes, as in `at 14:30`, which schedules the job for 2:30 PM today. Option D is correct because it follows the standard `at` time format.

Answer

crontab -e

Answer

batch

Answer

at 14.30

Question 10

Which configuration file is the primary configuration file for logrotate?

Accepted Answer

/etc/logrotate.conf. The primary configuration file for logrotate is /etc/logrotate.conf. This file sets global options such as rotation frequency, compression, and the number of rotated logs to keep. It also includes configuration snippets from /etc/logrotate.d/ via an include directive, but the main control file is /etc/logrotate.conf.

Answer

/var/log/messages

Answer

/etc/logrotate.d/

Answer

/etc/rsyslog.conf

Question 11

After creating a new user with 'useradd john', the user 'john' cannot log in. What is the most likely cause?

Accepted Answer

No password has been set for the user. The `useradd` command creates a new user account but does not set a password. Without a password, the system's authentication mechanism (typically PAM) will deny login attempts, as there is no valid password hash in `/etc/shadow`. The user must have a password assigned via `passwd john` before they can authenticate.

Answer

The home directory does not exist

Answer

The user's shell is not set

Answer

The user is not in the sudoers file

Question 12

An administrator needs to restart the SSH service after a configuration change. Which TWO commands can accomplish this on a systemd-based system?

Accepted Answer

systemctl restart sshd. On a systemd-based system, the correct command to restart the SSH service is `systemctl restart sshd`. This command communicates directly with systemd's service manager to stop and then start the sshd unit, ensuring proper state tracking and dependency handling.

Answer

initctl restart sshd

Answer

rc.d restart sshd

Answer

/etc/init.d/sshd restart

Question 13

Which THREE directories are commonly used for mounting removable media in Linux?

Accepted Answer

/mnt. A is correct because /mnt is a standard directory defined by the Filesystem Hierarchy Standard (FHS) for temporarily mounting filesystems, including removable media like USB drives or external hard disks. It provides a generic mount point that system administrators can use for manual mounts, though it is less commonly used for automatic mounting compared to /media.

Answer

/mount

Answer

/dev

Question 14

Which THREE signals are commonly used to terminate a process with the kill command?

Accepted Answer

SIGKILL. SIGKILL (signal 9) is one of the three signals commonly used to terminate a process with the kill command because it forcefully kills the process without allowing it to clean up or ignore the signal. SIGTERM (signal 15) is the default signal sent by kill, requesting graceful termination. SIGHUP (signal 1) is traditionally used to hang up a terminal line but is also commonly used to reload configuration files or terminate processes in daemon management.

Answer

SIGSTOP

Answer

SIGINT

Question 15

Refer to the exhibit. What is the purpose of the 'test -x /usr/sbin/anacron' command in the cron entries?

Accepted Answer

It ensures the periodic tasks are not run if anacron is installed.. The 'test -x /usr/sbin/anacron' command checks if the anacron binary exists and is executable. If it is, the test returns true (exit code 0), and the subsequent periodic tasks (e.g., run-parts) are skipped due to the logical NOT operator '!' at the beginning of the cron entry. This prevents duplicate execution of periodic jobs when both cron and anacron are installed, as anacron is designed to handle them for systems that may not be running continuously.

Answer

It checks if anacron is executable and then runs the periodic tasks.

Answer

It starts anacron if it is not already running.

Answer

It logs the output of the periodic tasks to a file.

LPIC-1 Administrative Tasks Practice Test 3 — 15 Questions

Exhibit

LPIC-1 Administrative Tasks Practice Test 3 — 15 Questions

Exhibit