EX200 Practice Test 34 — 15 Questions

Question 1

Refer to the exhibit. An administrator runs lsblk and sees the above output. The administrator wants to mount /dev/sdb1 at /mnt/data. What should be done first?

Accepted Answer

Create the directory /mnt/data and then run mount. Before mounting a filesystem, the mount point directory must exist. Option A correctly instructs to create /mnt/data with mkdir -p /mnt/data and then run mount /dev/sdb1 /mnt/data. Without the directory, the mount command will fail with a 'mount point does not exist' error.

Answer

Run mount /dev/sdb1 /mnt/data

Answer

Run partprobe to detect the partition

Answer

Run mkfs.xfs /dev/sdb1

Answer

Edit /etc/fstab and add an entry

Question 2

A system administrator adds a new 10GB disk (/dev/sdb) to a server. The requirement is to create a single ext4 filesystem on the entire disk for storing application data. Which sequence of commands should be used?

Accepted Answer

fdisk /dev/sdb (create one partition) -> mkfs.ext4 /dev/sdb1 -> mount /dev/sdb1 /data. Option B is correct because it follows the proper sequence: first create a partition on /dev/sdb using fdisk, then format that partition (/dev/sdb1) with an ext4 filesystem using mkfs.ext4, and finally mount it to /data. Filesystems must be created on a partition (e.g., /dev/sdb1), not directly on the whole disk device (/dev/sdb), otherwise the system will not recognize the filesystem correctly for mounting and use.

Answer

fdisk /dev/sdb (create one partition) -> mkfs.ext4 /dev/sdb (without partition number)

Answer

mkfs.ext4 /dev/sdb && mount /dev/sdb /data

Answer

mkfs.ext4 /dev/sdb && mount /dev/sdb /data

Question 3

A system administrator needs to create a point-in-time backup of a logical volume 'lv_home' that is currently mounted. Which LVM feature should be used?

Accepted Answer

lvcreate -s. Option D is correct because the 'lvcreate -s' command creates a snapshot of a logical volume, which provides a point-in-time backup without unmounting the volume. Snapshots are a native LVM feature that allow consistent backups of mounted filesystems by capturing the state of the logical volume at the moment the snapshot is created.

Answer

lvreduce

Answer

lvchange

Answer

lvextend

Answer

pvmove

Question 4

Which TWO of the following are required steps when migrating a logical volume from one physical volume to another in the same volume group?

Accepted Answer

Remove the source physical volume from the volume group with vgreduce after migration. Option C is correct because after using pvmove to relocate all physical extents from the source physical volume to the target, you must remove the source PV from the volume group using vgreduce to clean up the volume group metadata and free the device for other use. This step ensures the volume group no longer references the now-empty source PV.

Answer

Delete and recreate the logical volume on the new physical volume

Answer

Add the new physical volume to the volume group with vgextend if not already present

Answer

Extend the logical volume to include the new physical volume

Question 5

An administrator is configuring a RAID 1 (mirror) using two 100GB disks /dev/sda and /dev/sdb. After creating the array, which command(s) will verify the array status? (Choose the best answer.)

Accepted Answer

Both A and B. Option E is correct because both `mdadm --detail /dev/md0` and `mdadm --examine /dev/sda` are valid commands to verify the status of a RAID 1 array. `mdadm --detail /dev/md0` shows the current state, sync status, and member disks of the assembled array, while `mdadm --examine /dev/sda` displays the superblock metadata on a component disk, confirming its role in the array and its health. Together, they provide a complete verification from both the array and disk perspectives.

Answer

mdadm --detail /dev/md0

Answer

mdadm --examine /dev/sda

Answer

cat /proc/mdstat

Answer

mdadm --query /dev/md0

Question 6

A DevOps engineer needs to run a container that stores persistent data in a location managed by Podman, ensuring the data survives container removal and can be easily backed up. Which approach should the engineer use?

Accepted Answer

Use a Podman volume (e.g., --volume myvol:/container/data). Option C is correct because Podman volumes are managed by Podman itself, storing data in a dedicated directory (typically under /var/lib/containers/storage/volumes). This ensures data persists independently of the container lifecycle, survives container removal, and can be easily backed up using commands like `podman volume backup` or by copying the volume directory. Unlike bind mounts, Podman volumes are fully managed, avoiding permission issues and providing a clean abstraction for persistent storage.

Answer

Use a bind mount (e.g., --volume /host/data:/container/data)

Answer

Use the --rm flag when running the container

Answer

Use a tmpfs mount (e.g., --tmpfs /container/data)

Question 7

Refer to the exhibit. An administrator needs to create a new logical volume named 'data' of size 3GB. Which command should be used?

Accepted Answer

lvcreate -n data -L 3G vg01. Option A is correct because the `lvcreate` command with `-n data` names the logical volume 'data', `-L 3G` sets its size to 3 gigabytes, and `vg01` specifies the volume group that contains the physical volumes. This matches the requirement exactly, assuming the volume group `vg01` exists and has sufficient free extents.

Answer

lvcreate -n data -L 3G vg00

Answer

lvcreate -n data -L 3G /dev/sda1

Answer

lvcreate -n data -l 100 vg01

Answer

lvcreate -n data -l 100 vg00

Question 8

An administrator needs to pull a container image from a private registry at registry.example.com:5000. The registry requires authentication. Which command should be used first?

Accepted Answer

podman login registry.example.com:5000. Option A is correct because `podman login` authenticates the user to the specified private registry (registry.example.com:5000) before any pull or push operation. Without prior authentication, Podman cannot access the registry's content, and the pull command will fail with an authentication error.

Answer

podman tag registry.example.com:5000/myimage

Answer

podman images

Answer

podman pull registry.example.com:5000/myimage

Question 9

An administrator wants to add 20GB of additional space to the root filesystem. The volume group vg01 has no free extents. Which action should be taken first?

Accepted Answer

Attach a new disk, create a physical volume on it, add it to vg01 with vgextend, then extend vg01-root. Option D is correct because to extend the root filesystem when the volume group has no free extents, you must first add a new physical volume to the volume group. This involves attaching a new disk, creating a physical volume on it with `pvcreate`, adding it to vg01 with `vgextend`, and then using `lvextend` followed by `resize2fs` (or `xfs_growfs` for XFS) to extend the logical volume and filesystem. This sequence ensures the volume group has available extents before extending the logical volume.

Answer

Shrink the logical volume vg01-data and then extend vg01-root

Answer

Run vgextend vg01 /dev/sdc (assuming /dev/sdc is a new disk) but this command requires the PV to be created first

Answer

Use lvextend to extend the root logical volume into the free space of sdb1

Question 10

Which single command shows the UUID of a filesystem on /dev/sdb1?

Accepted Answer

blkid /dev/sdb1. The `blkid /dev/sdb1` command queries the libblkid library to read the filesystem metadata directly from the block device, displaying attributes including the UUID (Universally Unique Identifier) stored in the superblock. This is the standard, single-purpose command to retrieve the UUID of a specific partition.

Answer

df -h

Answer

mount

Answer

fdisk -l

Question 11

A containerized web server needs to persist logs outside the container. Which podman run option allows the administrator to specify a bind mount with mount propagation options?

Accepted Answer

--mount. Option A is correct because the `--mount` flag in `podman run` provides the most granular control over bind mounts, including the ability to specify mount propagation options (e.g., `shared`, `slave`, `private`) via the `propagation` parameter. This is essential for persisting container logs to the host filesystem while controlling how mount events are propagated between the container and the host.

Answer

--volume

Answer

--bind

Answer

-v

Question 12

A user wants to run a container that will restart automatically unless explicitly stopped by the administrator. Which podman run option should be used?

Accepted Answer

--restart=unless-stopped. The `--restart=unless-stopped` policy ensures the container restarts automatically whenever it exits, unless the administrator explicitly stops it with `podman stop`. This matches the requirement exactly: the container will keep restarting even after system reboots or crashes, but will not restart if the admin manually stops it. The other policies either do not restart on manual stop (`always`) or only restart on non-zero exit codes (`on-failure`).

Answer

--restart=on-failure

Answer

--restart=always

Answer

--restart=no

Question 13

A database container crashes repeatedly. The administrator wants to see the last 10 lines of the container's logs before it exited. Which command should be used?

Accepted Answer

podman logs --tail 10 . The `podman logs --tail 10 ` command retrieves the last 10 lines of the container's log output, which is exactly what the administrator needs to see the final log entries before the container exited. The `--tail` flag specifies the number of lines from the end of the log, making it ideal for troubleshooting a crash without viewing the entire log history.

Answer

podman logs -f <container>

Answer

podman logs --since 10m <container>

Answer

podman inspect <container>

Question 14

Based on the exhibit, which command should be used to start the container named 'mycontainer'?

Accepted Answer

podman start mycontainer. The correct command to start an existing but stopped container is 'podman start mycontainer'. 'podman start' resumes a container that has been created (via 'podman create') or previously stopped, without creating a new instance. Option D is correct because it directly addresses the requirement to start the container named 'mycontainer' that already exists.

Answer

podman attach mycontainer

Answer

podman restart mycontainer

Answer

podman run mycontainer

Question 15

Which THREE statements about container storage in podman are correct? (Choose THREE.)

Accepted Answer

The --storage-opt flag can be used to set options for the container's writable layer.. Option B is correct because the `--storage-opt` flag in Podman allows you to pass options directly to the container's storage driver, such as setting the size of the container's writable layer (e.g., `--storage-opt size=10G`). This is a feature of the container storage stack (containers/storage) that Podman uses, enabling fine-grained control over the writable layer's behavior without affecting the image layers.

Answer

Podman volumes can only be managed by podman volume commands, not manually.

Answer

Rootless containers cannot use the overlay filesystem driver.

EX200 Practice Test 34 — 15 Questions

Exhibit

EX200 Practice Test 34 — 15 Questions

Exhibit