The answer is that `mount -t nfs4 server:/export /mnt`, `mount -o hard,intr server:/export /mnt`, and `mount -t nfs server:/export /mnt` are all valid methods to mount an NFS filesystem on a client. These commands are correct because they either explicitly specify the NFS version with the `-t` flag or rely on the default version (typically NFSv3) while applying essential mount options like `hard` and `intr`, which control how the client handles server unavailability and signal interruptions. On the LFCS exam, this question tests your practical understanding of the `mount` command syntax and NFS-specific behavior, often appearing as a multiple-select item where a common trap is assuming that only one version flag is valid or that `-o hard,intr` requires a version flag. A useful memory tip is to remember that NFSv4 is explicitly called with `-t nfs4`, while NFSv3 can be mounted with either `-t nfs` or just the options directly, and the `hard,intr` pair is a classic safety net for production mounts.
LFCS Storage Management Practice Question
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.
Which THREE of the following are valid methods to mount an NFS filesystem on a client?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
mount -o hard,intr server:/export /mnt
Option B is correct because the `mount` command with `-o hard,intr` specifies NFS-specific mount options: `hard` ensures that NFS operations retry indefinitely until the server responds, and `intr` allows signals to interrupt a hung NFS operation. The command `mount -o hard,intr server:/export /mnt` uses the default NFS version (typically NFSv3) and is a valid method to mount an NFS filesystem on a client.
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.
✗
echo 'server:/export /mnt nfs defaults 0 0' >> /etc/fstab && mount -a
Why it's wrong here
Incorrect: mount -a reads /etc/fstab but the command as written is incomplete; also mount -a alone is not a mount method.
✓
mount -o hard,intr server:/export /mnt
Why this is correct
Correct: NFS mount with options.
Related concept
Read the scenario before looking for a memorised answer.
✗
mount -t cifs server:/share /mnt
Why it's wrong here
Incorrect: -t cifs is for CIFS, not NFS.
✓
mount -t nfs server:/export /mnt
Why this is correct
Correct: Explicit NFS type.
Related concept
Read the scenario before looking for a memorised answer.
✓
mount -t nfs4 server:/export /mnt
Why this is correct
Correct: NFSv4 type.
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 confuse NFS with CIFS/SMB (option C) or forget that `mount -t nfs4` is a valid alternative to `mount -t nfs` for NFSv4 exports, while option A is a valid configuration method but not a direct mount command as the question implies.
Trap categories for this question
Command / output trap
Incorrect: mount -a reads /etc/fstab but the command as written is incomplete; also mount -a alone is not a mount method.
Detailed technical explanation
How to think about this question
NFS (Network File System) uses the Remote Procedure Call (RPC) protocol for communication, and the `mount` command with `-t nfs` defaults to NFSv3 unless overridden by the `nfsvers` option. NFSv4 (specified with `-t nfs4`) integrates mounting, locking, and authentication into a single protocol, eliminating the need for separate `portmap` and `mountd` services. In real-world scenarios, using `hard,intr` is common for critical mounts to prevent data corruption from interrupted operations, but `intr` is deprecated in newer kernels and replaced by `timeo` and `retrans` tuning.
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 hard,intr server:/export /mnt — Option B is correct because the `mount` command with `-o hard,intr` specifies NFS-specific mount options: `hard` ensures that NFS operations retry indefinitely until the server responds, and `intr` allows signals to interrupt a hung NFS operation. The command `mount -o hard,intr server:/export /mnt` uses the default NFS version (typically NFSv3) and is a valid method to mount an NFS filesystem on a client.
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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