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CV0-004 Practice Question: Which TWO of the following are common causes of…
Which TWO of the following are common causes of performance degradation in a cloud-based application?
⚠ Common exam trap
CompTIA often tests the misconception that over-provisioning (Option A) causes performance degradation, but in cloud environments, over-provisioning leads to cost inefficiency, not performance loss, while under-provisioning is the actual performance risk.
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
✓
Resource contention from other tenants on the same hypervisor (noisy neighbor)
Resource contention, commonly known as the 'noisy neighbor' effect, occurs when multiple virtual machines (VMs) on the same hypervisor compete for shared physical resources such as CPU caches, memory bandwidth, and disk I/O. This contention can cause unpredictable performance degradation in a cloud-based application, as one tenant's heavy workload starves others of resources. Cloud providers often mitigate this using CPU pinning, I/O throttling, or dedicated instances, but without such controls, noisy neighbors remain a common cause of performance issues.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Over-provisioned virtual machines
Why it's wrong here
Over-provisioning leads to waste, not degradation.
- ✓
Resource contention from other tenants on the same hypervisor (noisy neighbor)
Why this is correct
Noisy neighbor is a classic cloud performance issue.
- ✗
Load balancer distributing traffic evenly
Why it's wrong here
Load balancer improves performance, not degrade.
- ✓
Insufficient IOPS on the storage volume
Why this is correct
Insufficient IOPS causes performance issues.
- ✗
Insufficient bandwidth to the cloud provider
Why it's wrong here
Less common; usually internal bottlenecks.
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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.