Unit 3: Networking, Packages, File Systems, and Virtualization - Practice Quiz

1 Which service manages network connections by default on Red Hat Enterprise Linux?

2 What is the primary purpose of an IP address?

3 Which command displays IP addresses assigned to network interfaces?

4 Which command lists NetworkManager connection profiles?

5 In RHEL 9, which directory commonly stores NetworkManager connection profile files?

6 Which command sets a persistent system host name?

7 Which command creates a gzip-compressed tar archive named backup.tar.gz from the data directory?

8 Which command securely copies files between systems using SSH?

9 Which tool can synchronize files with a remote system through SSH?

10 Which command installs the httpd package on a current RHEL system?

11 Which command updates all installed packages for which updates are available?

12 Which command lists enabled yum repositories?

13 Which command displays information about an uninstalled RPM package file named app.rpm?

14 Which RHEL command registers a system with Red Hat Subscription Management?

15 Which command displays block devices in a tree-like format?

16 Which command detaches the file system mounted at /mnt/data?

17 Which command creates a symbolic link named shortcut to report.txt?

18 Which command searches under /etc for files named hosts?

19 Which service provides the traditional virtualization management daemon on a RHEL host?

20 Which graphical application can be used to create and manage local virtual machines?

21 A server has routes for 192.168.0.0/16, 192.168.10.0/24, and a default route. Which route is used for traffic sent to 192.168.10.25?

22 A system can ping 8.8.8.8, but an application cannot connect to server.example.com. Which command best checks whether the host name can be resolved using the system's configured name-service sources?

23 Which command correctly configures the connection static-ens3 with address 192.0.2.10/24, gateway 192.0.2.1, and manual IPv4 addressing?

24 An administrator manually edits a NetworkManager connection profile for the connection named office. What should be done to make NetworkManager reread and activate the changed profile?

25 Which command persistently changes a RHEL system's host name to db01.example.com?

26 An archive named logs.tar.xz was compressed with xz. Which command lists its contents without extracting any files?

27 Which command securely copies the local directory /opt/tools and all its contents to /srv/ on admin@host2?

28 Which command synchronizes the contents of /srv/site/ to /srv/site/ on web.example.com over SSH while deleting destination files that no longer exist in the source?

29 An administrator wants to install the httpd package and automatically install any required dependencies. Which command should be used?

30 A server runs several critical applications. The administrator wants to update only the installed openssl package rather than all packages. Which command is appropriate?

31 The repository tools-repo is disabled, but an administrator wants to enable it only for a single installation of diagnostic-tool. Which command meets this requirement?

32 Before installing backup-agent.rpm, an administrator wants to inspect the package's installation and removal scripts. Which command should be used?

33 On a traditionally managed RHEL system, which command sequence registers the host and automatically attaches a suitable available subscription?

34 A local RPM file named tool.rpm requires dependencies available in enabled repositories. Which command installs the file and resolves those dependencies?

35 Which command provides a tree-style view of block devices together with their file-system types, labels, UUIDs, and mount points?

36 A file system with UUID abcd-1234 should be mounted persistently at /data as XFS. Which /etc/fstab entry is appropriate?

37 The command umount /data reports that the target is busy. Which command can identify processes currently using that mounted file system?

38 The command ln report.txt report-link.txt creates a hard link. What happens if report.txt is later deleted?

39 Which command searches /var/log for regular files modified within approximately the last 24 hours?

40 Which command lists both running and stopped virtual machines managed by the local libvirt service?

41 A RHEL host has the following routes:

- 10.20.0.0/16 via 192.0.2.1 metric 50
- 10.20.30.0/24 via 192.0.2.2 metric 200
- 10.20.30.0/24 via 192.0.2.3 metric 100
- default via 192.0.2.254 metric 10

Which gateway is selected for a packet destined for 10.20.30.45?

42 A server can ping its default gateway and 8.8.8.8, but getent hosts repo.example.com fails. /etc/resolv.conf lists nameserver 192.0.2.53. Which command sequence most directly distinguishes a DNS-server reachability problem from an NSS configuration problem?

43 Connection profile prod currently receives an IPv4 address through DHCP. It must instead use 192.0.2.20/24, gateway 192.0.2.1, and DNS servers 192.0.2.53 and 192.0.2.54, without retaining DHCP-provided DNS. Which command correctly changes the persistent profile?

44 An administrator directly edits a NetworkManager connection profile on disk while its old version remains loaded in memory. Which action makes NetworkManager reread the profile and then applies it to connection storage?

45 A host has hosts: files dns in /etc/nsswitch.conf. /etc/hosts maps 192.0.2.10 app.example.com, while DNS maps the same name to 192.0.2.20. Which result should getent ahostsv4 app.example.com normally report first?

46 A directory tree contains POSIX ACLs, extended attributes, and SELinux labels. Which command creates a gzip-compressed archive while explicitly preserving all three metadata classes?

47 A user runs scp -p report root@server:/secure/. Assuming the transfer succeeds, which property is preserved by -p in addition to the file contents?

48 The local directory /srv/site/ must become an exact mirror of /var/www/site/ on web1, including deleting local files absent from the remote source. Which command has the required source-directory semantics?

49 A RHEL system has packages at versions both newer and older than those currently available in enabled repositories. Which command synchronizes installed package versions with repository versions, allowing required downgrades?

50 A repository configuration contains enabled=1, gpgcheck=1, and a valid baseurl, but no usable signing key has been imported or referenced. What is the expected result when installing a signed package from that repository?

51 Before installing agent.rpm, an administrator must inspect the shell commands that its RPM scriptlets would execute. Which command performs that inspection without installing the package?

52 A system must be registered noninteractively using an organization-specific activation key. Which command uses the intended subscription-manager workflow?

53 An RPM update contains a changed configuration file marked %config(noreplace). The installed copy has also been locally modified. What does RPM normally do during the update?

54 A storage device may appear under different /dev/sdX names after reboot. Which command most directly obtains its filesystem UUID for use in /etc/fstab?

55 The following /etc/fstab entry should allow the machine to continue booting when an occasionally disconnected data disk is absent:

UUID=abc123 /archive xfs defaults 0 0

Which option should be added for that requirement?

56 A filesystem is mounted with noexec, and /mnt/tools/check.sh has executable mode bits. Direct execution fails, but the administrator can read the file. Which invocation can still run the script unless another security control blocks it?

57 File /data/current.db has two hard links. A process replaces that pathname by creating a new file and atomically renaming it over /data/current.db. What happens to the other hard link?

58 An administrator must find regular files under /srv that have the setuid bit set, without crossing into other mounted filesystems below /srv. Which command meets both requirements?

59 A libvirt virtual network named isolated is currently active but does not start after the host reboots. Which command changes its persistent startup behavior without redefining the network?

60 A new KVM guest must be created with a 30 GiB qcow2 disk, attached to libvirt's default network, and installed graphically from an ISO. Which virt-install command specifies those requirements?