Quick Answer
The answer is that a missing or incorrect SELinux context on the mount point directory is the most likely cause. When SELinux is enforcing, the kernel checks the security context of the target directory before allowing a mount operation; if the context is not set to a type like `default_t` or one appropriate for the filesystem being mounted, the system may treat the directory as nonexistent for the mount operation, even though it visibly exists. This is a classic trap on the Red Hat Certified System Administrator EX200 exam, testing your understanding that SELinux can override traditional filesystem behavior—the misleading error message is designed to trick candidates into checking directory existence or filesystem issues first. Remember the mnemonic: “If the path is real but the mount won’t seal, check the context for the SELinux deal.”
This EX200 practice question tests your understanding of create and configure file systems. 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 technician attempts to mount an XFS filesystem from /dev/sdc1 to /mnt/backup but receives: 'mount: /mnt/backup: mount point does not exist.' The directory /mnt/backup does exist. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
SELinux context of /mnt/backup prevents mounting.
SELinux can block mount if context is wrong.
The directory /mnt/backup is not empty.
Why wrong: Mount would succeed but hide contents.
The device /dev/sdc1 does not exist.
Why wrong: Error would be different.
The filesystem on /dev/sdc1 is not XFS.
Why wrong: Would give 'wrong fs type' error.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
SELinux context of /mnt/backup prevents mounting.
The error message 'mount: /mnt/backup: mount point does not exist' is misleading because the directory does exist. The most likely cause is that SELinux is blocking the mount due to a missing or incorrect context on the mount point. SELinux requires the mount point directory to have a specific context (e.g., `default_t` or a context matching the filesystem type) for the mount to succeed; if the context is wrong or missing, the kernel may treat the directory as nonexistent for the mount operation.
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.
SELinux context of /mnt/backup prevents mounting.
Why this is correct
SELinux can block mount if context is wrong.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
The directory /mnt/backup is not empty.
Why it's wrong here
Mount would succeed but hide contents.
The device /dev/sdc1 does not exist.
Why it's wrong here
Error would be different.
The filesystem on /dev/sdc1 is not XFS.
Why it's wrong here
Would give 'wrong fs type' error.
Common exam traps
Red Hat often tests the misconception that a mount point must be empty, but the real trap here is that SELinux can cause a 'does not exist' error even when the directory is present, leading candidates to overlook SELinux as the root cause.
Detailed technical explanation
When SELinux is enforcing, the kernel checks the security context of the mount point directory against the policy. If the context is not `default_t` or a type that allows mounting (e.g., `file_type` for filesystem types), the mount syscall may return ENOENT (No such file or directory) even though the directory exists. This behavior is controlled by the `mount` permission in SELinux policy and can be diagnosed with `ls -Z /mnt/backup` and `audit2allow` to see denials. In real-world scenarios, this often occurs after restoring a directory from backup or creating it with a non-standard context.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the EX200 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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
Create and configure file systems — This question tests Create and configure file systems — Read the scenario before looking for a memorised answer..
The correct answer is: SELinux context of /mnt/backup prevents mounting. — The error message 'mount: /mnt/backup: mount point does not exist' is misleading because the directory does exist. The most likely cause is that SELinux is blocking the mount due to a missing or incorrect context on the mount point. SELinux requires the mount point directory to have a specific context (e.g., `default_t` or a context matching the filesystem type) for the mount to succeed; if the context is wrong or missing, the kernel may treat the directory as nonexistent for the mount operation.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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