Quick Answer
The answer is high CPU ready time and insufficient memory causing swapping. CPU ready time measures the time a virtual CPU spends waiting to be scheduled on a physical core; when this value is high, it signals contention for the host’s processors, directly degrading VM performance. Insufficient memory forces the hypervisor to use disk-based swapping, which is orders of magnitude slower than RAM, leading to severe latency and slowdowns. On the CompTIA Cloud+ CV0-004 exam, these two causes are the most common performance pitfalls tested in the troubleshooting domain, often appearing as distractors alongside network or DNS issues that affect connectivity rather than compute speed. A common trap is confusing security group rules with performance—they block traffic but don’t degrade speed. Remember the mnemonic “Ready to Swap”: high CPU ready time and memory swapping are the twin culprits for cloud VM slowdowns.
This CV0-004 practice question tests your understanding of troubleshooting. 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.
Which TWO are common causes of virtual machine performance degradation in a cloud environment?
Misconfigured security groups
Why wrong: Affects access, not performance directly.
Insufficient memory allocation
Causes swapping and slow performance.
Network latency to storage
Why wrong: Less common; storage latency is usually internal.
Incorrect DNS settings
Why wrong: DNS affects name resolution, not VM performance.
High CPU ready time
Indicates vCPU overcommitment and contention.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Insufficient memory allocation
Options A and D are correct. CPU ready time indicates contention, and insufficient memory causes swapping. B is incorrect because security groups affect connectivity, not performance. C is partially true but network latency is less common than CPU/memory. E is incorrect as incorrect DNS causes resolution issues, not performance.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Misconfigured security groups
Why it's wrong here
Affects access, not performance directly.
Insufficient memory allocation
Why this is correct
Causes swapping and slow performance.
Related concept
Read the scenario before looking for a memorised answer.
Network latency to storage
Why it's wrong here
Less common; storage latency is usually internal.
Incorrect DNS settings
High CPU ready time
Why this is correct
Indicates vCPU overcommitment and contention.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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.
Troubleshooting — study guide chapter
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Troubleshooting practice questions
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FAQ
Troubleshooting — This question tests Troubleshooting — Read the scenario before looking for a memorised answer..
The correct answer is: Insufficient memory allocation — Options A and D are correct. CPU ready time indicates contention, and insufficient memory causes swapping. B is incorrect because security groups affect connectivity, not performance. C is partially true but network latency is less common than CPU/memory. E is incorrect as incorrect DNS causes resolution issues, not performance.
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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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