This CV0-004 practice question tests your understanding of operations and support. 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 cloud administrator runs the `iostat` command on a Linux VM experiencing slow performance. Based on the exhibit, what is the most likely bottleneck?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Disk I/O is saturated.
The `iostat` command reports CPU and I/O statistics. The exhibit shows high `%util` (e.g., 99.9%) and elevated `await` or `svctm` values, indicating that the disk device is operating at or near its maximum capacity. This means the disk I/O subsystem is saturated, causing requests to queue and slowing overall VM performance.
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.
✓
Disk I/O is saturated.
Why this is correct
High %iowait and disk utilization indicate I/O bottleneck.
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.
✗
Network bandwidth is limited.
Why it's wrong here
No network metrics in output.
✗
CPU is overloaded.
Why it's wrong here
CPU %user + %system = 7.3%, not high.
✗
Memory is insufficient.
Why it's wrong here
iostat does not show memory metrics.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may misinterpret high `%util` as a CPU bottleneck because `iostat` also displays CPU stats, but the question specifically asks about the bottleneck indicated by the exhibit, which clearly points to disk I/O saturation.
Trap categories for this question
Command / output trap
No network metrics in output.
Detailed technical explanation
How to think about this question
The `%util` field in `iostat -x` represents the percentage of time the disk was busy servicing requests. A value near 100% indicates the disk is saturated, meaning the I/O queue is growing and latency increases. However, note that `%util` can be misleading for SSDs or NVMe devices due to their ability to handle multiple concurrent commands; in such cases, average queue size (`avgqu-sz`) and service time (`svctm`) provide better insight. Real-world scenarios include misconfigured RAID arrays, insufficient IOPS provisioning in cloud environments, or a noisy-neighbor effect on shared storage.
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 CV0-004 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.
Operations and Support — This question tests Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Disk I/O is saturated. — The `iostat` command reports CPU and I/O statistics. The exhibit shows high `%util` (e.g., 99.9%) and elevated `await` or `svctm` values, indicating that the disk device is operating at or near its maximum capacity. This means the disk I/O subsystem is saturated, causing requests to queue and slowing overall VM performance.
What should I do if I get this CV0-004 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.