RHCSA RHCSA EX200 5

Question 1

Which command adds a swap partition at /dev/sdb2 and activates it immediately without a reboot?

Accepted Answer

mkswap /dev/sdb2 && swapon /dev/sdb2

Answer

fdisk --swap /dev/sdb2

Answer

mkfs.swap /dev/sdb2 && mount -t swap /dev/sdb2

Answer

swapon --create /dev/sdb2

Question 2

Which configuration file defines system-wide resource limits (e.g., max open files) for PAM-authenticated sessions?

Accepted Answer

/etc/security/limits.conf

Answer

/etc/sysctl.conf

Answer

/etc/pam.d/common-session

Answer

/etc/systemd/system.conf

Question 3

You need to redirect all port 80 traffic to port 8080 on the local machine using firewalld. Which command does this?

Accepted Answer

firewall-cmd --add-forward-port=port=80:proto=tcp:toport=8080 --permanent

Answer

firewall-cmd --add-masquerade=80:8080

Answer

iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080

Answer

firewall-cmd --port=80 --redirect=8080 --permanent

Question 4

Which command lists all active and inactive systemd unit files along with their enabled/disabled state?

Accepted Answer

systemctl list-unit-files

Answer

systemctl status --all

Answer

systemctl show --all

Answer

journalctl --list-units

Question 5

When configuring autofs to automount an NFS share, which file defines the mount point directory and points to the map file?

Accepted Answer

/etc/auto.master

Answer

/etc/fstab

Answer

/etc/autofs.conf

Answer

/etc/nfs.conf

Question 6

A script requires JAVA_HOME to be set for all users at login. Which file is the best place to define this environment variable system-wide?

Accepted Answer

/etc/profile.d/java.sh

Answer

~/.bashrc

Answer

/etc/bashrc

Answer

/etc/environment.d/java.conf

Question 7

Which command verifies that a container image will run correctly as a systemd service by checking the generated unit file before enabling it?

Accepted Answer

podman generate systemd --name container_name

Answer

podman inspect --systemd

Answer

systemctl verify container_name

Answer

podman service --check container_name