The answer is a memory leak in the application, as the "Out of memory: killed process" message in the VM's OS logs directly indicates that the Linux OOM Killer terminated a process because the virtual machine exhausted its allocated RAM. This occurs when a process, often due to a memory leak, continuously allocates memory without releasing it, eventually starving the system of available pages. On the CompTIA Cloud+ CV0-004 exam, this scenario tests your ability to distinguish between host-level and guest-level resource exhaustion—a common trap is confusing a VM OOM event with a hypervisor memory overcommitment issue, which would appear in host logs, not the VM’s OS logs. Remember the key distinction: if the OOM killer fires inside the VM, the problem is inside the VM. Memory tip: think "VM OOM = app boom" to recall that a memory leak in the guest application is the most direct cause.
CV0-004 Operations and Support Practice Question
This CV0-004 practice question tests your understanding of operations and support. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 receives an alert that a virtual machine has unexpectedly shut down. The administrator checks the hypervisor logs and finds an entry "Out of memory: killed process" in the VM's OS logs. Which of the following is the most likely cause?
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
✓
The VM has a memory leak in its application.
Option C is correct because the OOM killer message in the VM's OS indicates that a process consumed too much memory, likely due to a memory leak. Option A would cause host-side OOM, not VM-side. Option B would affect the host, not the VM. Option D could be a factor but a memory leak is the most direct cause of running out of memory.
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 hypervisor memory overcommitment is too high.
Why it's wrong here
Hypervisor overcommitment would cause the hypervisor to kill VMs, not a process inside a VM.
✓
The VM has a memory leak in its application.
Why this is correct
A memory leak causes the VM's memory to be exhausted, triggering the OOM killer.
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.
✗
The VM's memory balloon driver is not installed.
Why it's wrong here
Missing balloon driver causes host OOM, not VM internal OOM.
✗
The VM's swap space is insufficient.
Why it's wrong here
Insufficient swap can contribute but is not the primary cause; a memory leak is more specific.
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.
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 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 CV0-004 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.
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: The VM has a memory leak in its application. — Option C is correct because the OOM killer message in the VM's OS indicates that a process consumed too much memory, likely due to a memory leak. Option A would cause host-side OOM, not VM-side. Option B would affect the host, not the VM. Option D could be a factor but a memory leak is the most direct cause of running out of memory.
What should I do if I get this CV0-004 question wrong?
Identify which CV0-004 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.
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.
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Question Discussion
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