The correct answer is that the VM is actively swapping memory due to memory pressure, as indicated by a SWCUR value of 512 MB and non-zero SWR/s and SWW/s rates. This occurs because the VM’s memory demands exceed its allocated 4096 MB, forcing the hypervisor to page memory to disk, while a MCTLSZ of 0 confirms no ballooning is active. On the VCP-DCV exam, this scenario tests your ability to differentiate between swapping and ballooning by reading esxtop or vCenter performance metrics—a common trap is mistaking high ballooning for swapping, but ballooning uses a guest driver to reclaim memory without disk I/O. Remember the key distinction: swapping shows disk activity (SWR/s, SWW/s) and a non-zero SWCUR, while ballooning shows a non-zero MCTLSZ with no disk swap rates. A quick memory tip: “SWAP hits the disk, BALLOON hits the guest.”
VCP-DCV vSphere Performance and Scaling Practice Question
This VCP-DCV practice question tests your understanding of vsphere performance and scaling. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Exhibit
Refer to the exhibit.
Memory section from resxtop:
MCTLSZ MEMSZ SWCUR SWR/s SWW/s
0.0 4096 512 10 5
Based on the exhibit, which statement about the virtual machine's memory state is TRUE?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The VM is actively swapping memory because of memory pressure.
SWCUR (current swapped memory) is 512 MB, and SWR/s and SWW/s show non-zero swap rates, indicating that the VM is actively swapping memory to disk. MCTLSZ is 0, meaning no ballooning is occurring. The VM's memory size is 4096 MB. Swapping is a sign of memory pressure.
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.
✗
The VM is using the memory balloon driver to reclaim memory.
Why it's wrong here
MCTLSZ is 0, so the balloon driver is not reclaiming memory.
✗
The VM is using transparent page sharing to reduce memory usage.
Why it's wrong here
Transparent page sharing is not shown in this exhibit; it would appear under other metrics.
✗
The VM has no memory pressure and is performing optimally.
Why it's wrong here
Swapping indicates memory pressure and poor performance.
✓
The VM is actively swapping memory because of memory pressure.
Why this is correct
SWCUR and swap rates confirm swapping is occurring.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Transparent page sharing is not shown in this exhibit; it would appear under other metrics.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 VCP-DCV 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 VCP-DCV exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
vSphere Performance and Scaling — This question tests vSphere Performance and Scaling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The VM is actively swapping memory because of memory pressure. — SWCUR (current swapped memory) is 512 MB, and SWR/s and SWW/s show non-zero swap rates, indicating that the VM is actively swapping memory to disk. MCTLSZ is 0, meaning no ballooning is occurring. The VM's memory size is 4096 MB. Swapping is a sign of memory pressure.
What should I do if I get this VCP-DCV question wrong?
Identify which VCP-DCV exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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