The correct answer is that the database server is using standard HDD storage instead of SSD. This is the most likely cause because database workloads rely on random I/O patterns—such as frequent reads and writes to scattered disk sectors—where HDDs suffer from high seek times and low IOPS, while SSDs excel with near-instantaneous access and high throughput. On the CompTIA Cloud+ CV0-004 exam, this scenario tests your understanding of storage performance in cloud migrations, specifically how lift-and-shift can blindly replicate on-premises HDD configurations that underperform in the cloud. A common trap is assuming identical instance sizes guarantee identical performance, but storage type is the critical variable. Remember the memory tip: “Databases need random speed, not sequential greed”—SSD for random I/O, HDD for sequential bulk storage.
CV0-004 Deployment Practice Question
This CV0-004 practice question tests your understanding of deployment. 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 company recently migrated its on-premises e-commerce application to a public cloud using lift-and-shift. After the migration, users report that the application is slower than before. The application consists of a web server, an application server, and a database server, all deployed on separate virtual machines. The cloud architecture uses the same instance sizes as the on-premises servers. The cloud administrator notices that the database server's disk I/O latency is higher than expected. What is the most likely cause of the performance degradation?
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 database server is using standard HDD storage instead of SSD.
The database server's disk I/O latency is higher than expected because the lift-and-shift migration likely retained the same storage type as on-premises, but the cloud environment's standard HDD (hard disk drive) storage has significantly lower IOPS and higher latency compared to SSD (solid-state drive) storage. In a public cloud, standard HDD is optimized for sequential workloads and infrequent access, not for the random I/O patterns typical of a database server, causing performance degradation. The administrator should have provisioned SSD-backed storage (e.g., AWS gp3 or Azure Premium SSD) for the database VM to match or exceed on-premises performance.
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 database server is using standard HDD storage instead of SSD.
Why this is correct
HDD has higher latency, impacting database performance.
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 cloud provider's network has high latency.
Why it's wrong here
Cloud networks are typically low latency; issue is specific to database disk.
✗
The application server is not load-balanced.
Why it's wrong here
Load balancing affects distribution of traffic, not database I/O latency.
✗
The web server has too many vCPUs allocated.
Why it's wrong here
Excess vCPUs generally don't cause higher latency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that 'cloud performance is always better' or that network latency is the default culprit, but the trap here is that disk storage tiering (HDD vs. SSD) is a common oversight in lift-and-shift migrations, and candidates may incorrectly blame network or compute resources instead of the storage layer.
Detailed technical explanation
How to think about this question
Cloud providers offer multiple disk tiers: standard HDD (e.g., AWS st1/sc1) provides burstable IOPS around 500-2000 with latency in the tens of milliseconds, while SSD (e.g., AWS gp3) offers baseline IOPS of 3000 and sub-millisecond latency. Database engines like MySQL or PostgreSQL rely heavily on random read/write operations for transaction logs and indexes, making SSD critical; using HDD for a database under load causes I/O queue buildup and increased latency. In a lift-and-shift scenario, administrators often overlook storage tiering because on-premises servers may have used local SAS HDDs with RAID caching, masking the latency difference that becomes apparent in the cloud.
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.
TExam Day Tips
→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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The database server is using standard HDD storage instead of SSD. — The database server's disk I/O latency is higher than expected because the lift-and-shift migration likely retained the same storage type as on-premises, but the cloud environment's standard HDD (hard disk drive) storage has significantly lower IOPS and higher latency compared to SSD (solid-state drive) storage. In a public cloud, standard HDD is optimized for sequential workloads and infrequent access, not for the random I/O patterns typical of a database server, causing performance degradation. The administrator should have provisioned SSD-backed storage (e.g., AWS gp3 or Azure Premium SSD) for the database VM to match or exceed on-premises performance.
What should I do if I get this CV0-004 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is deploying a cloud-based application that requires consistent, low-latency access to shared database files. Which storage option should be used for the database files?
medium
✓ A.Block storage volumes attached to the database server
B.Network file system (NFS) mount
C.Object storage (e.g., Amazon S3)
D.Ephemeral instance storage
Why A: Block storage volumes (e.g., Amazon EBS or Azure Managed Disks) provide consistent, low-latency I/O performance because they are directly attached to the database server via a high-speed network and support protocols like NVMe or SCSI. This allows the database to perform synchronous writes and reads with minimal jitter, which is critical for transactional workloads that require ACID compliance. Unlike shared file systems or object storage, block storage offers the raw disk-level access that database engines (e.g., MySQL, PostgreSQL, SQL Server) expect for their data and log files.
Last reviewed: Jun 30, 2026
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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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