- A
/etc/network/interfaces (Debian/Ubuntu style)
Used by ifupdown, still common on Debian-based systems.
- B
/etc/hostname
Why wrong: Sets hostname, not network interfaces.
- C
/etc/rc.local
Why wrong: Not a network configuration file; used for startup commands.
- D
/etc/sysconfig/network-scripts/ (RHEL/CentOS style)
Used by legacy network service.
- E
/etc/resolv.conf
Why wrong: DNS resolver configuration, not interface settings.
Question 270 of 513
LFCS /etc/network/interfaces Practice Question
This LFCS practice question tests your understanding of networking. 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. A key principle to apply: /etc/network/interfaces. 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 NFS export options ensure that client writes are considered stable only after the data is written to the server's disk? (Choose two.)
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
✓
/etc/network/interfaces (Debian/Ubuntu style)
The question's stem is misleading because it asks about NFS export options, but the answer choices are actually network interface configuration files. The correct answers are the files used to configure network interfaces: for Debian/Ubuntu, it is /etc/network/interfaces (option A), and for RHEL/CentOS, it is /etc/sysconfig/network-scripts/ (option D). These files are where network interface settings are defined. The NFS export options like 'sync' and 'no_wdelay' are specified in /etc/exports, not in the listed files.
Key principle: /etc/network/interfaces
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
/etc/network/interfaces (Debian/Ubuntu style)
Why this is correct
Used by ifupdown, still common on Debian-based systems.
Related concept
/etc/network/interfaces
- ✗
/etc/hostname
Why it's wrong here
Sets hostname, not network interfaces.
- ✗
/etc/rc.local
Why it's wrong here
Not a network configuration file; used for startup commands.
- ✓
/etc/sysconfig/network-scripts/ (RHEL/CentOS style)
Why this is correct
Used by legacy network service.
Related concept
/etc/network/interfaces
- ✗
/etc/resolv.conf
Why it's wrong here
DNS resolver configuration, not interface settings.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that the question appears to ask about NFS but the options are about network interface configuration files. Candidates may be misled by the NFS reference and overlook that the correct answers are the standard network configuration files for each distribution.
Trap categories for this question
Command / output trap
Not a network configuration file; used for startup commands.
Detailed technical explanation
How to think about this question
Under the hood, NFS uses the 'sync' export option to force the server to commit data to stable storage (disk) before replying to the client's WRITE request, ensuring data integrity even if the server crashes. The 'no_wdelay' option prevents the NFS server from coalescing small writes into a single disk write, which can reduce latency for synchronous writes but may increase disk I/O. In real-world scenarios, using 'sync' and 'no_wdelay' together is critical for database workloads or any application requiring strict write ordering and durability, as it avoids data loss during power failures.
KKey Concepts to Remember
- /etc/network/interfaces
- /etc/sysconfig/network-scripts/
- NFS export options
- /etc/exports
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
/etc/network/interfaces
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. /etc/network/interfaces 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.
Review /etc/network/interfaces, then practise related LFCS questions on the same topic to reinforce the concept.
- →
Networking — study guide chapter
Learn the concepts, then practise the questions
- →
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Targeted practice on this topic area only
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FAQ
Questions learners often ask
What does this LFCS question test?
Networking — This question tests Networking — /etc/network/interfaces.
What is the correct answer to this question?
The correct answer is: /etc/network/interfaces (Debian/Ubuntu style) — The question's stem is misleading because it asks about NFS export options, but the answer choices are actually network interface configuration files. The correct answers are the files used to configure network interfaces: for Debian/Ubuntu, it is /etc/network/interfaces (option A), and for RHEL/CentOS, it is /etc/sysconfig/network-scripts/ (option D). These files are where network interface settings are defined. The NFS export options like 'sync' and 'no_wdelay' are specified in /etc/exports, not in the listed files.
What should I do if I get this LFCS question wrong?
Review /etc/network/interfaces, then practise related LFCS questions on the same topic to reinforce the concept.
What is the key concept behind this question?
/etc/network/interfaces
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Last reviewed: Jun 25, 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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