- A
mount -o noexec /dev/sdb1 /mnt/data
Correct: mount with noexec option.
- B
Add 'exec' to the fourth field of /etc/fstab for the entry.
Why wrong: Allows execution, opposite of noexec.
- C
Add 'defaults' to the fourth field of /etc/fstab for the entry.
Why wrong: Default options include exec, not noexec.
- D
mount --bind /mnt/data1 /mnt/data2
Why wrong: Bind mount does not set noexec unless specified.
- E
Add 'noexec' to the fourth field of /etc/fstab for the entry.
Correct: fstab option noexec.
Question 36 of 513
LFCS Storage Management Practice Question
This LFCS practice question tests your understanding of storage management. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which TWO of the following are valid ways to mount a filesystem with the 'noexec' option to prevent execution of binaries?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
mount -o noexec /dev/sdb1 /mnt/data
Option A is correct because the `mount -o noexec /dev/sdb1 /mnt/data` command explicitly sets the `noexec` mount option at runtime, which prevents execution of any binaries on the mounted filesystem. This is a direct and valid way to apply the `noexec` flag without modifying configuration files.
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 noexec /dev/sdb1 /mnt/data
Why this is correct
Correct: mount with noexec option.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Add 'exec' to the fourth field of /etc/fstab for the entry.
Why it's wrong here
Allows execution, opposite of noexec.
- ✗
Add 'defaults' to the fourth field of /etc/fstab for the entry.
Why it's wrong here
Default options include exec, not noexec.
- ✗
mount --bind /mnt/data1 /mnt/data2
Why it's wrong here
Bind mount does not set noexec unless specified.
- ✓
Add 'noexec' to the fourth field of /etc/fstab for the entry.
Why this is correct
Correct: fstab option noexec.
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 often confuse the 'defaults' option in fstab with a safe or neutral setting, not realizing that 'defaults' implicitly includes 'exec', so they incorrectly select option C as a valid way to prevent execution.
Detailed technical explanation
How to think about this question
The `noexec` mount option is a per-mount security control that prevents the kernel from honoring the execute permission on files within that filesystem, enforced at the VFS layer. In real-world scenarios, this is commonly used on partitions like `/tmp` or `/var/tmp` to mitigate attacks that rely on executing downloaded or uploaded binaries. A subtle behavior is that `noexec` does not prevent execution of scripts via an interpreter (e.g., `bash script.sh`) because the interpreter itself is executed from a different filesystem; only direct binary execution via `execve()` is blocked.
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.
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FAQ
Questions learners often ask
What does this LFCS question test?
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 noexec /dev/sdb1 /mnt/data — Option A is correct because the `mount -o noexec /dev/sdb1 /mnt/data` command explicitly sets the `noexec` mount option at runtime, which prevents execution of any binaries on the mounted filesystem. This is a direct and valid way to apply the `noexec` flag without modifying configuration files.
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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Last reviewed: Jul 4, 2026
This LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS exam.
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