Unit 6: Network Storage, Boot, Security, and Installation - Practice Quiz

1 Which protocol is commonly used to share directories between Linux systems over a network?

2 Which command displays the NFS exports available from a remote server?

3 Which command mounts the NFS export server:/share on /mnt/share?

4 Which file is commonly edited to make an NFS mount persistent across reboots?

5 Which service mounts network file systems automatically when their directories are accessed?

6 Which file is the main configuration map for the autofs service?

7 Which boot loader is commonly used by Red Hat Enterprise Linux?

8 Which command displays the default systemd boot target?

9 Which systemd target starts a graphical login environment?

10 Which parameter can be added to the GRUB kernel command line to interrupt startup for root password recovery?

11 Which command is used to assign a new password to the root account after entering the recovery environment?

12 Which command checks and repairs a Linux file system?

13 Which firewall management service is commonly used in Red Hat Enterprise Linux?

14 Which command allows HTTP traffic in the current firewalld configuration?

15 Which option makes a firewall-cmd rule remain after a reboot?

16 Which utility is used to manage SELinux port type assignments?

17 What does SELinux do when it operates in enforcing mode?

18 What is the name of the graphical installer used by Red Hat Enterprise Linux?

19 What is the main purpose of a Kickstart file?

20 Which graphical tool can be used to create and manage KVM virtual machines?

21 A Linux administrator needs to identify available NFS exports from a server before mounting one. Which command is most appropriate?

22 Which /etc/fstab entry mounts the /projects export from files.example.com on /mnt/projects using NFS at boot?

23 An NFS mount fails because the client cannot resolve the server name. Which action should be checked first?

24 What is the main advantage of using autofs for an NFS home directory?

25 In an indirect autofs map, which location is typically used for a map entry mounting an export under /home/remote?

26 A system boots to a graphical interface, but an administrator wants to start it in a non-graphical troubleshooting mode for one boot. Which GRUB action is appropriate?

27 Which command permanently configures a system to boot into the graphical target?

28 An administrator needs a target that starts networking and most system services but does not start a graphical login manager. Which target should be selected?

29 After booting into an emergency shell to reset the root password on an SELinux-enabled system, which sequence helps preserve correct file labels?

30 Why is rw init=/bin/bash sometimes added to the Linux kernel command line during root password recovery?

31 A boot process reports errors on an unmounted ext4 file system. Which command is appropriate for checking and repairing it?

32 A server enters emergency mode because an /etc/fstab entry references a disk that is temporarily unavailable. Which option can prevent the missing mount from stopping boot?

33 A service should accept connections only from the 192.0.2.0/24 network. Which control best enforces this requirement?

34 Which command permanently permits HTTPS traffic in the default firewalld zone and immediately applies the change?

35 An administrator added port 8080/tcp to firewalld but remote clients still cannot connect. Which check is most useful next?

36 A web service labeled for HTTP is configured to listen on TCP port 8443. Which command adds the correct SELinux port label?

37 Which command displays the SELinux port types currently associated with TCP ports used by HTTP services?

38 During a Red Hat Enterprise Linux installation, which partitioning approach gives the installer control over the layout while retaining automatic file system creation?

39 A minimal RHEL server requires remote administration after installation. Which installation choice is most directly relevant?

40 A Kickstart file must run a command after package installation but before the system reboots. Which section should contain the command?

41 A RHEL client can resolve an NFS server's hostname and ping it, but showmount -e server.example.com times out. The server exports directories through NFSv4 only and its firewall permits the NFS service. Which conclusion best explains the timeout?

42 A client must mount the NFSv4 export server.example.com:/projects at /mnt/projects during boot. Boot must continue if the server is unavailable, and ordinary local file-system checks must not be attempted. Which /etc/fstab entry is most appropriate?

43 An application writes critical records to an NFS mount. Administrators want interrupted operations to keep retrying after a temporary server outage rather than return potentially unsafe I/O errors to the application. Which mount behavior best satisfies this requirement?

44 An autofs indirect map should mount each user's NFS home directory only when /home/<username> is accessed. The server stores homes as /exports/home/<username>. Which map entry correctly uses a wildcard substitution?

45 After adding /data /etc/auto.data to /etc/auto.master.d/data.autofs, an administrator creates /etc/auto.data with reports -rw server:/exports/reports. Accessing /data/reports still returns "No such file or directory," and no autofs process has reloaded the configuration. What is the most direct corrective action?

46 A system enters emergency mode because a nonessential local data volume listed in /etc/fstab is missing. Administrators want future boots to continue without waiting for that volume, while still mounting it automatically whenever it is available. Which change is most appropriate?

47 A graphical RHEL server must boot into text-only multi-user mode for one troubleshooting session, then return to its configured graphical default on the next reboot. Which approach meets both requirements?

48 A server currently uses graphical.target by default. An administrator runs systemctl isolate multi-user.target from a graphical session. What is the expected result?

49 A RHEL system is booted with rd.break to reset a forgotten root password on an SELinux-enforcing installation. Which sequence correctly updates the installed system and prepares SELinux labels for the next boot?

50 Boot stops because an XFS file system on /dev/mapper/vg-data is corrupt. The volume is not the root file system and can be kept unmounted in emergency mode. Which repair procedure is appropriate?

51 A non-root ext4 file system fails its automatic boot check. The administrator has confirmed it is unmounted and wants a forced consistency check that automatically accepts repairs. Which command is appropriate?

52 A host has two NetworkManager connections, both currently active. A firewall zone was assigned by editing only one connection profile with nmcli, but packets continue to use the old zone. What additional action is generally required for the profile change to take effect?

53 An administrator runs firewall-cmd --zone=public --add-service=https and confirms that HTTPS works. After reboot, the rule is gone. Which command adds the missing persistent configuration without immediately altering the current runtime state?

54 A server's public zone is bound to interface ens3, but the source network 192.0.2.0/24 is explicitly assigned to the trusted zone. A packet from 192.0.2.10 arrives through ens3. Which zone handles the packet?

55 A custom web service runs under the confined HTTP server domain and must listen on TCP port 8088. The firewall is already open, but SELinux denies the bind. Port 8088 has no existing SELinux port mapping. Which persistent command is appropriate?

56 An administrator attempts semanage port -a -t http_port_t -p tcp 8443, but the command reports that TCP port 8443 is already defined with another SELinux type. What should the administrator do after verifying that reassignment is appropriate?

57 A UEFI-based RHEL installation uses GPT, software RAID for most storage, and a separate EFI System Partition. Which design is required for firmware boot support?

58 During installation, a server must retain data on an existing partition while replacing the operating system. Which storage action best minimizes the risk of destroying the retained data?

59 A Kickstart %post script must copy a file from the installation environment's /run/install/repo into the installed system. The script needs direct access to both the installer environment and the target mounted at /mnt/sysroot. Which section declaration is most appropriate?

60 A KVM guest must be live-migratable among hosts with different CPU generations. Maximum guest CPU performance is less important than compatibility. Which CPU configuration is the best choice?