0 — Test 606

Correct Answer: A. mount
Explanation: mkfs creates the filesystem, fdisk partitions the disk, and fsck checks and repairs filesystems.

Correct Answer: C. It fails; rmdir removes only empty directories
Explanation: rm -r removes a directory along with its contents.

Correct Answer: A. dnf and yum automatically resolve and install dependencies from repositories
Explanation: rpm -ivh installs a single package file and fails if its dependencies are missing. ALSO KNOW (related points): • Which package manager is the default on RHEL 8 and later? → dnf (yum still exists as an alias) • Which command lists every installed RPM package? → rpm -qa

Correct Answer: D. dnf (yum still exists as an alias)
Explanation: apt is used on Debian and Ubuntu. zypper is used on SUSE.

Correct Answer: A. rpm -qa
Explanation: In rpm -qa, -q means query and -a means all.

Correct Answer: A. It configures httpd to start at boot, but does not start it now (unless --now is added)
Explanation: Use systemctl enable --now httpd to do both. ALSO KNOW (related points): • Which boot loader do current RHEL versions use? → GRUB2 • What is the relationship between Linux and Red Hat Enterprise Linux? → Linux is the kernel; RHEL is a commercially supported distribution built around it

Correct Answer: B. multi-user.target
Explanation: graphical.target corresponds to runlevel 5. ALSO KNOW (related points): • What is PID 1 on RHEL 7 and later? → systemd • Which command shows systemd journal logs for the sshd service? → journalctl -u sshd • Which tool is the standard way to configure network connections on RHEL 7 and later? → nmcli (NetworkManager)

Correct Answer: C. systemd
Explanation: RHEL 6 used Upstart, with init as PID 1.

Correct Answer: B. journalctl -u sshd
Explanation: Add -f to follow the log live, or -b to show only the current boot.

Correct Answer: D. It takes effect immediately but is lost after a reload or reboot
Explanation: Use --permanent and then firewall-cmd --reload to keep the rule. ALSO KNOW (related points): • Which file on RHEL shows the exact release version? → /etc/redhat-release