The correct answer is `--volume /run/host-service.sock:/run/host-service.sock`, because the `--volume` flag in Podman supports bind-mounting individual files, including Unix sockets, directly from the host filesystem into the container. Unlike mounting a directory, this option maps the exact host socket file to the same path inside the container, enabling the containerized process to communicate with the host service over that socket without any network configuration. On the CompTIA Linux+ XK0-005 exam, this question tests your understanding of container storage and inter-process communication—specifically how to expose host-level resources like sockets without using network ports. A common trap is assuming you must mount the entire parent directory, but Podman (and Docker) allow single-file mounts, which is more precise and secure. Remember the mnemonic: "Socket? Single file, single volume flag."
XK0-005 Scripting, Containers and Automation Practice Question
This XK0-005 practice question tests your understanding of scripting, containers and automation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A DevOps engineer is creating a Podman container that needs to communicate with a host service listening on a Unix socket at /run/host-service.sock. Which of the following mount options will make the socket available inside the container?
Option C is correct because `--volume` in Podman (and Docker) can bind-mount a single file, such as a Unix socket, from the host into the container. This makes `/run/host-service.sock` available at the same path inside the container, allowing the containerized process to communicate with the host service over the socket.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
While technically correct, the simpler --volume is preferred and also valid.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse `--device` (for hardware devices) with bind-mounting a socket file, or they misremember the exact syntax for `--mount`, which requires `type=bind` and comma-separated key=value pairs.
Detailed technical explanation
How to think about this question
Unix sockets are special files that enable inter-process communication (IPC) using the same filesystem namespace. When bind-mounting a socket into a container, the container process can connect to it using the standard socket API (e.g., `connect()`), which is transparent to the application. In Podman, the `--volume` flag (or `-v`) implicitly performs a bind mount for files and directories, while `--mount` provides explicit control over mount options like `bind-propagation`.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this XK0-005 question in full detail.
Scripting, Containers and Automation — This question tests Scripting, Containers and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: --volume /run/host-service.sock:/run/host-service.sock — Option C is correct because `--volume` in Podman (and Docker) can bind-mount a single file, such as a Unix socket, from the host into the container. This makes `/run/host-service.sock` available at the same path inside the container, allowing the containerized process to communicate with the host service over the socket.
What should I do if I get this XK0-005 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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