Quick Answer
The answer is `mount -o loop /tmp/image.iso /mnt/iso`. This command is correct because the `-o loop` option instructs the mount command to associate the ISO file with a loop device, which is a pseudo-device that allows a regular file to be accessed as if it were a block device. Without this option, mount would expect a physical partition or device path, not a standard file, and would fail. On the LPIC-1 exam, this question tests your understanding of filesystem mounting and the loop device concept, a common topic in the "Devices, Linux Filesystems, Filesystem Hierarchy Standard" domain. A frequent trap is forgetting the `-o loop` syntax or trying to mount the ISO directly to a device node like `/dev/loop0` without the automatic loop setup. A helpful memory tip is to think of the loop as a "loop-around" that tricks the system into treating a file like a disk—just remember "loop the file, mount the point."
This LPIC-1 practice question tests your understanding of devices, filesystems and fhs. 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.
An administrator needs to mount an ISO image file /tmp/image.iso to the directory /mnt/iso. Which command should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
mount -o loop /tmp/image.iso /mnt/iso
Correct: loop option needed for file.
mount -o ro /tmp/image.iso /mnt/iso
Why wrong: Missing loop option.
mount -t iso /tmp/image.iso /mnt/iso
Why wrong: Invalid filesystem type.
mount /tmp/image.iso /mnt/iso
Why wrong: Missing -o loop; will fail.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
mount -o loop /tmp/image.iso /mnt/iso
Option A is correct because the `-o loop` option tells the mount command to use a loop device, which is required to mount a file (like an ISO image) as if it were a block device. Without the loop option, mount expects a block device path, not a regular file.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
mount -o loop /tmp/image.iso /mnt/iso
Why this is correct
Correct: loop option needed for file.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
mount -o ro /tmp/image.iso /mnt/iso
Why it's wrong here
Missing loop option.
mount -t iso /tmp/image.iso /mnt/iso
Why it's wrong here
Invalid filesystem type.
mount /tmp/image.iso /mnt/iso
Why it's wrong here
Missing -o loop; will fail.
Common exam traps
The trap here is that candidates often forget the `-o loop` option and assume mount can directly handle a file path, or they confuse the read-only option (`-o ro`) with the loop option, thinking read-only is sufficient for ISO images.
Detailed technical explanation
The loop device (`/dev/loop0`, etc.) is a pseudo-device that allows a regular file to be accessed as a block device. When you run `mount -o loop`, the kernel automatically finds a free loop device and associates it with the file. This is essential for mounting ISO images, disk images, or any filesystem stored in a file. In modern Linux, `mount` can sometimes auto-detect the need for a loop device, but explicitly using `-o loop` is the reliable, exam-correct method.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Devices, Filesystems and FHS — This question tests Devices, Filesystems and FHS — Read the scenario before looking for a memorised answer..
The correct answer is: mount -o loop /tmp/image.iso /mnt/iso — Option A is correct because the `-o loop` option tells the mount command to use a loop device, which is required to mount a file (like an ISO image) as if it were a block device. Without the loop option, mount expects a block device path, not a regular file.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This LPIC-1 practice question is part of Courseiva's free LPI certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LPIC-1 exam.
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