This LFCS practice question tests your understanding of storage management. 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 system administrator needs to mount an ext4 filesystem with the options 'noatime' and 'errors=remount-ro'. Which mount command is correct?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
mount -o noatime,errors=remount-ro /dev/sda1 /mnt
Option D is correct because the `mount -o noatime,errors=remount-ro /dev/sda1 /mnt` command uses a single `-o` flag with a comma-separated list of mount options, which is the proper syntax for specifying multiple options. The `noatime` option disables updating the access time on reads, and `errors=remount-ro` tells the kernel to remount the filesystem as read-only if an I/O error is encountered, both of which are valid ext4 mount options.
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.
✗
mount -o noatime,errors=remount /dev/sda1 /mnt
Why it's wrong here
The correct option is 'errors=remount-ro', not 'errors=remount'.
✗
mount -o noatime -o errors=remount-ro /dev/sda1 /mnt
Why it's wrong here
Multiple -o options are not the standard syntax; options should be comma-separated in one -o.
✗
mount -o atime=no,errors=remount-ro /dev/sda1 /mnt
Why it's wrong here
The option is 'noatime', not 'atime=no'.
✓
mount -o noatime,errors=remount-ro /dev/sda1 /mnt
Why this is correct
Comma-separated options in one -o is correct.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may incorrectly use multiple `-o` flags (as in option B) or mistype the `errors` option (as in option A), confusing the `remount-ro` syntax with the unrelated `remount` command, or they may assume `atime=no` is a valid alternative to `noatime` (as in option C).
Detailed technical explanation
How to think about this question
The `noatime` option eliminates the need to write access timestamps to the inode on every read, significantly reducing disk I/O and improving performance on systems with heavy read workloads, such as mail servers or web servers. The `errors=remount-ro` option is handled by the kernel's filesystem error handling mechanism; when an I/O error occurs, the filesystem is immediately remounted read-only to prevent further corruption, and this state is logged in the kernel ring buffer (accessible via `dmesg`). In real-world scenarios, combining these options is common for critical data partitions where performance and data integrity are both priorities.
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 practitioner preparing for the LFCS 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Storage Management — This question tests Storage Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: mount -o noatime,errors=remount-ro /dev/sda1 /mnt — Option D is correct because the `mount -o noatime,errors=remount-ro /dev/sda1 /mnt` command uses a single `-o` flag with a comma-separated list of mount options, which is the proper syntax for specifying multiple options. The `noatime` option disables updating the access time on reads, and `errors=remount-ro` tells the kernel to remount the filesystem as read-only if an I/O error is encountered, both of which are valid ext4 mount options.
What should I do if I get this LFCS 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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