LPIC-1 Practice Test 7 — 10 Questions

Question 1

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 2

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

Question 3

Which command is used to view the last few lines of a log file and simultaneously follow new entries as they are written?

Accepted Answer

tail -f. The `tail -f` command is correct because it displays the last 10 lines of a file by default and then continues to monitor the file for new lines, outputting them as they are appended. This is essential for real-time log monitoring, as it uses inotify or polling to detect file changes without requiring manual re-reading.

Answer

cat

Answer

head -n 10

Answer

less

Question 4

In the /etc/shadow file, a user's password hash begins with '$6$'. What hash algorithm does this prefix indicate?

Accepted Answer

SHA-512. The prefix '$6$' in the /etc/shadow file indicates that the password hash was generated using the SHA-512 (Secure Hash Algorithm 512-bit) algorithm. This is defined in the crypt(3) function's modular crypt format, where $1$ is MD5, $5$ is SHA-256, and $6$ is SHA-512. SHA-512 is the strongest of the commonly used hash algorithms in Linux password hashing, providing a 512-bit digest.

Answer

SHA-256

Answer

MD5

Answer

Blowfish

Question 5

Refer to the exhibit. When will the cron job execute?

Accepted Answer

Every minute.. The cron job entry `* * * * *` specifies five fields (minute, hour, day of month, month, day of week), each set to `*`, meaning 'every'. This results in the job executing every minute of every hour, every day of the month, every month, and every day of the week — i.e., every minute without restriction.

Answer

Every minute of every hour, but only weekdays.

Answer

Every day at midnight.

Answer

Every hour.

Question 6

A system fails to mount an XFS filesystem with the entry in /etc/fstab. The entry looks correct. Which fstab field might be missing or incorrect?

Accepted Answer

The filesystem type field. The XFS filesystem requires the filesystem type field in /etc/fstab to be explicitly set to 'xfs'. If this field is missing or incorrect (e.g., left blank, set to 'auto', or mistyped as 'ext4'), the mount command will fail because it cannot determine the correct filesystem driver to use. Even if the device, mountpoint, and options appear correct, an incorrect or missing type field prevents the kernel from loading the XFS module and mounting the filesystem.

Answer

The device field

Answer

The options field

Answer

The mountpoint field

Question 7

A technician runs 'blkid' and sees output like '/dev/sda2: UUID="abc-def-ghi" TYPE="ext4"'. Which command can mount this partition using its UUID?

Accepted Answer

mount -U "abc-def-ghi" /mnt. The 'mount' command supports the '-U' option to specify a partition by its UUID, which is a unique identifier for the filesystem. This allows mounting without relying on device names like /dev/sda2, which can change across reboots. The UUID is taken directly from the 'blkid' output.

Answer

mount -I "abc-def-ghi" /mnt

Answer

mount /dev/sda2 /mnt

Answer

mount -L "abc-def-ghi" /mnt

Question 8

Match each Linux signal to its default action.

Accepted Answer

SIGINT: Terminate the process. Common Linux signals: SIGINT, SIGTERM, and SIGKILL terminate processes; SIGSTOP and SIGTSTP stop processes; SIGQUIT terminates with a core dump.

Answer

SIGTERM: Stop the process

Answer

SIGKILL: Core dump

Answer

SIGTSTP: Terminate the process

Question 9

Match each device file naming pattern to its device type.

Accepted Answer

/dev/sda: SATA/SCSI hard disk. Common Linux device naming conventions: /dev/sdX for SATA/SCSI, /dev/hdX for IDE, /dev/ttySX for serial ports, /dev/srX for optical drives, /dev/nvmeXnY for NVMe. Be cautious not to confuse with floppy (/dev/fdX) or other types.

Answer

/dev/sr0: Floppy disk

Question 10

A system administrator needs to schedule a recurring maintenance task that runs every Monday at 3 AM. Which crontab entry is correct?

Accepted Answer

0 3 * * 1 /script.sh. The crontab syntax is minute, hour, day of month, month, day of week. Setting minute=0, hour=3, day of week=1 runs the script at 3:00 AM every Monday (day 1 represents Monday in cron).

Answer

3 0 * * 1 /script.sh

Answer

0 3 * * 0 /script.sh

Answer

0 3 * * 7 /script.sh