hardMultiple Select
CV0-004 Practice Question: A cloud administrator is troubleshooting a…
A cloud administrator is troubleshooting a performance issue in a virtualized environment. Which THREE of the following metrics should the administrator analyze to identify potential resource contention? (Select THREE.)
⚠ Common exam trap
The trap here is that candidates often select network latency or swap file usage as signs of resource contention, but these metrics are not direct indicators of hypervisor-level contention for CPU, memory, or storage in a virtualized environment.
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
✓
CPU ready time
CPU ready time (A) is correct because it measures the percentage of time a vCPU is ready to run but is waiting for a physical CPU to become available, which directly indicates CPU overcommitment and contention in a virtualized host. Disk queuing (B) is correct because queue depth and latency on the storage path reveal contention for shared datastore or LUN IOPS, showing when VMs are waiting on storage resources. Memory ballooning (E) is correct because the balloon driver reclaims guest memory when the host is under memory pressure, so active ballooning signals memory contention and overcommitment on the ESXi host. Swap file usage (C) is not the best indicator of contention since it reflects paging activity that may occur for reasons other than host-level resource contention, and network latency (D) points to network path or congestion issues rather than contention for CPU, memory, or storage resources.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
CPU ready time
Why this is correct
CPU ready time measures how long a vCPU waited in the queue for a physical core, expressed as a percentage of elapsed time. Elevated values directly indicate host CPU overcommitment and contention, making it a primary metric for diagnosing virtualised performance degradation.
- ✓
Disk queuing
Why this is correct
Disk queuing reflects the depth and latency of outstanding I/O requests against a datastore. Sustained queue depth above the storage array's capability signals contention for shared disk spindles or LUN throughput, revealing storage bottlenecks in the virtualised environment.
- ✗
Swap file usage
Why it's wrong here
Swap file usage reflects memory pressure inside a guest operating system, not contention between virtual machines on the hypervisor. It is tempting because swapping indicates a resource shortage, but it suits diagnosing an individual VM's memory exhaustion, whereas host-level metrics such as CPU ready time reveal contention.
- ✗
Network latency
Why it's wrong here
Network latency measures round-trip delay across the network path, not contention for CPU, memory or storage on the virtualisation host. It is tempting because latency spikes accompany many performance problems, but it suits diagnosing network congestion or WAN issues rather than host resource contention.
- ✓
Memory ballooning
Why this is correct
Memory ballooning directly exposes hypervisor memory reclamation: the balloon driver inflates inside the guest, forcing pages to swap and revealing contention when host RAM is oversubscribed. It satisfies the stem's resource-contention focus by quantifying memory pressure, unlike steady-state utilisation metrics that mask reclaim activity.
Go deeper
Related to this question
About these practice questions
Courseiva writes every CV0-004 question from scratch — 834 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.