The answer is insufficient IOPS on the storage volume and the noisy neighbor effect. Insufficient IOPS creates a storage I/O bottleneck, where the volume cannot process read/write requests fast enough to keep up with application demand, directly degrading throughput and latency. The noisy neighbor effect occurs when a virtual machine or container on a shared hypervisor consumes excessive resources—such as CPU, memory, or network bandwidth—starving neighboring workloads and causing unpredictable performance drops. On the CompTIA Cloud+ CV0-004 exam, these two causes are frequently paired as distractors against over-provisioning or load balancing, which actually improve performance. A common trap is confusing resource contention with insufficient allocation; remember that noisy neighbor is about competition, while low IOPS is about capacity. For the exam, think “neighbor noise and IOPS poise” to recall that both disrupt cloud application performance through shared resource starvation and storage throughput limits.
CV0-004 Operations and Support Practice Question
This CV0-004 practice question tests your understanding of operations and support. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 of the following are common causes of performance degradation in a cloud-based application?
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)
Option A is correct: noisy neighbors impact performance. Option D is correct: insufficient storage IOPS can cause I/O bottlenecks. Option B is wrong because over-provisioned resources would not degrade performance. Option C is wrong while correct but not as common as other options. Option E is wrong because load balancing improves performance.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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.
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
OSPF neighbours must agree on key parameters.
Router ID selection can affect neighbour relationships and LSDB output.
OSPF cost influences the preferred path.
A route can appear in OSPF information but not become the installed route.
TExam Day Tips
→Check area mismatch first when OSPF adjacency fails.
→Review passive interfaces when a network is advertised but no neighbour forms.
→Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related CV0-004 OSPF questions on adjacency and route selection.
Operations and Support — This question tests Operations and Support — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Resource contention from other tenants on the same hypervisor (noisy neighbor) — Option A is correct: noisy neighbors impact performance. Option D is correct: insufficient storage IOPS can cause I/O bottlenecks. Option B is wrong because over-provisioned resources would not degrade performance. Option C is wrong while correct but not as common as other options. Option E is wrong because load balancing improves performance.
What should I do if I get this CV0-004 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related CV0-004 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Question Discussion
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