EX200 Practice Test 8 — 10 Questions

Question 1

Which TWO statements about the /etc/shadow file are true? (Select exactly two.)

Accepted Answer

Contains hashed passwords for local users.. The /etc/shadow file stores hashed user passwords using algorithms like SHA-512 or yescrypt, as defined by the pam_unix module. It also contains password aging fields (e.g., minimum days, maximum days, warning period) that enforce password expiration policies. These two functions make options A and E correct.

Answer

Contains the user's UID.

Answer

Is used to store encrypted group passwords.

Answer

Is readable by all users.

Question 2

An administrator needs to configure a static IP address on an interface that will persist across reboots using NetworkManager. Which TWO commands or files can be used to achieve this?

Accepted Answer

nmcli con mod eth0 ipv4.addresses 192.168.1.10/24. The `nmcli con mod` command modifies the NetworkManager connection profile for the interface, setting a static IPv4 address that is stored persistently in the connection configuration. Option D is correct because editing the `/etc/sysconfig/network-scripts/ifcfg-eth0` file directly defines the static IP address in the ifcfg format, which NetworkManager reads on boot to apply persistent settings.

Answer

systemctl restart network

Answer

nmcli con up eth0

Answer

ip addr add 192.168.1.10/24 dev eth0

Question 3

Which TWO are correct ways to check the SELinux context of a file named 'test.txt'? (Choose exactly two.)

Accepted Answer

ls -Z test.txt. `ls -Z` displays the SELinux security context of files, including user, role, type, and sensitivity level. The `-Z` option is specifically designed to show SELinux context information for files and processes.

Answer

ls -l test.txt

Answer

sestatus

Answer

getenforce

Question 4

Based on the exhibit, which mount point is mounted with the 'noexec' option?

Accepted Answer

/tmp. The /tmp mount point is configured with the 'noexec' option, as shown in the exhibit (e.g., in /etc/fstab or the output of mount or findmnt). This prevents execution of binaries directly from the /tmp filesystem, which is a common security hardening practice to mitigate the risk of attackers running malicious scripts or binaries from a world-writable directory.

Answer

/data

Answer

/

Answer

/var

Answer

/boot

Question 5

Which TWO commands can be used to view the current disk usage of a filesystem?

Accepted Answer

du. The `du` command (disk usage) estimates file and directory space usage, allowing you to view disk usage at the file or directory level. The `df` command (disk free) reports the amount of available and used disk space on mounted filesystems, showing overall filesystem usage. Both are standard Linux tools for examining disk consumption.

Answer

blkid

Answer

fdisk

Answer

lsblk

Question 6

Which three network configuration methods are valid in RHEL 8/9?

Accepted Answer

/etc/sysconfig/network-scripts/ifcfg-* files. In RHEL 8/9, the traditional `/etc/sysconfig/network-scripts/ifcfg-*` files are still supported for backward compatibility, though NetworkManager is the default service. These files define interface configurations using variables like `DEVICE`, `BOOTPROTO`, and `ONBOOT`, and are read by the `ifup`/`ifdown` scripts or NetworkManager when configured to use them. This method remains valid for static or DHCP-based network setup without requiring a GUI.

Answer

system-config-network

Answer

ifconfig

Question 7

Which TWO commands can be used to create a new directory that will serve as a mount point?

Accepted Answer

install -d /mnt/newmount. `install -d /mnt/newmount` creates the directory `/mnt/newmount` if it does not already exist, setting it up as a mount point. Option D is correct because `mkdir /mnt/newmount` is the standard command to create a directory, which can then be used as a mount point for a filesystem.

Answer

touch /mnt/newmount

Answer

ln -s /mnt /mnt/newmount

Answer

ln /mnt /mnt/newmount

Question 8

A system administrator needs to ensure that a web server running Apache httpd starts automatically after a system reboot. Which command should the administrator use to enable the httpd service?

Accepted Answer

systemctl enable httpd. `systemctl enable httpd` creates the necessary symlinks in the systemd unit configuration directories (e.g., `/etc/systemd/system/multi-user.target.wants/`) to ensure the httpd service starts automatically at boot. This is the standard method for enabling a service in a Red Hat Enterprise Linux 8/9 environment using systemd.

Answer

systemctl daemon-reload

Answer

systemctl start httpd

Answer

systemctl reenable httpd

Question 9

Which command can be used to display a list of all currently mounted filesystems on a Linux system?

Accepted Answer

mount. The `mount` command with no arguments displays a list of all currently mounted filesystems, showing the device, mount point, filesystem type, and mount options. This is the standard and most direct way to view active mounts on a Linux system.

Answer

fdisk -l

Answer

lsblk -m

Answer

cat /proc/filesystems

Answer

df -a

Question 10

Match each cron syntax field to its meaning.

Accepted Answer

minute: 0-59. The five fields in a cron syntax are (in order): minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-7). Common confusions include swapping the minute and hour ranges.

Answer

minute: 0-23