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vSphere Performance and Scaling practice questions

Practise VMware Certified Professional Data Center Virtualization VCP-DCV vSphere Performance and Scaling practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security
20 questionsDomain: vSphere Performance and Scaling
Practice 10 questionsBrowse domain →

What the exam tests

What to know about vSphere Performance and Scaling

vSphere Performance and Scaling questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common vSphere Performance and Scaling exam traps

  • ▸Answering from memory before reading the full scenario.
  • ▸Missing a constraint such as cost, availability, security, scope or command context.
  • ▸Choosing a broad answer when the question asks for the most specific fix.
  • ▸Ignoring why the wrong options are tempting.

Practice set

vSphere Performance and Scaling questions

20 questions · select your answer, then reveal the explanation

Question 1mediummultiple choice
Read the full vSphere Performance and Scaling explanation →

A company's vSphere environment has multiple clusters with varying workloads. The operations team notices that one cluster consistently shows high CPU ready times on several hosts. Which action should be taken to address this performance issue?

Question 2hardmultiple choice
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An administrator wants to ensure that a critical database VM has consistent low-latency access to its virtual disks. The VM currently resides on a datastore backed by a hybrid array. Which configuration change best meets this requirement?

Question 3easymultiple choice
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A vSphere administrator is planning the storage configuration for a new cluster of 10 hosts running VDI workloads. Each VM requires approximately 100 IOPS for typical operation. Which storage design best balances performance and scalability?

Question 4mediummultiple choice
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During a performance review, an administrator notices that a VM with 4 vCPUs and 16 GB memory is experiencing over 10% CPU ready time. The host has two 8-core sockets (hyper-threading enabled) and 256 GB memory. The host runs 15 other VMs with varying CPU loads. What is the most likely cause?

Question 5hardmultiple choice
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A company runs a large vSphere environment with multiple clusters using vSAN. The performance team observes that some VMs are experiencing high latency on reads. The vSAN cluster is configured with 5 hosts, each having one cache tier (NVMe) and one capacity tier (SATA SSD). The VMs are all-flash storage policies. What should the administrator check first?

Question 6easymultiple choice
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An administrator wants to ensure that VMs running latency-sensitive applications are placed on hosts that minimize CPU scheduling delays. Which DRS setting should be configured?

Question 7mediummultiple choice
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A vSphere administrator is troubleshooting a VM that is experiencing excessive disk latency. The VM is on a datastore accessed via NFS over a 1GbE network. The host shows high network utilization. Which action should be taken to improve performance?

Question 8hardmultiple choice
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An administrator is designing a new vSphere cluster for a mission-critical application that requires extremely low network latency between VMs within the same cluster. The cluster will use vSphere vMotion for maintenance. Which network configuration best meets these requirements?

Question 9mediummulti select
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Which TWO factors contribute to increased CPU ready time on a vSphere host?

Question 10hardmulti select
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Which THREE actions would help reduce network latency for VMs in a vSphere environment?

Question 11easymulti select
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Which TWO are valid methods to monitor vSphere performance metrics?

Question 12hardmultiple choice
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Refer to the exhibit. The performance data shows MEMCTL at 5% and SWPOUT at 2%. What does this indicate about the host?

Exhibit

Refer to the exhibit.
```
esxtop -b -d 30 -n 2 > /tmp/perf.csv
# Sample output (abbreviated):
# CPU(%): 10.5, 12.3, 8.9, ...
# PMEM(%): 65, 70, 68, ...
# MEMCTL(%): 5, 4, 3, ...
# SWPOUT(%): 2, 1, 0, ...
```
Question 13mediummultiple choice
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Refer to the exhibit. A distributed virtual switch port shows dropped Rx packets and CRC errors. What is the most likely cause?

Exhibit

Refer to the exhibit.
```
# dvs_port_statistics (partial)
Port ID: 1234
Packets Received: 15000000
Packets Transmitted: 10000000
Dropped Rx: 150
Dropped Tx: 10
Rx CRC Errors: 10
```
Question 14hardmultiple choice
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Your company has a vSphere 7 environment with four clusters: Cluster-A (production VMs), Cluster-B (development), Cluster-C (database), and Cluster-D (VDI). Each cluster has 8 hosts with 256 GB RAM and dual 12-core CPUs (hyper-threading enabled). The environment uses vSAN for storage, with all-flash disk groups (1 NVMe cache + 4 SATA SSD capacity per host). You are the lead administrator. Recently, users in the VDI cluster (Cluster-D) report slow logins and application responsiveness during peak hours (9-11 AM). You examine the vSAN performance metrics and see that the cache hit ratio during peak hours drops to 60%, and the average read latency is 15 ms. The VMs are thin provisioned and use a storage policy with RAID-1 mirroring (FTT=1). The cluster has DRS enabled with default migration threshold. What should you do to improve VDI performance without disruptive changes?

Question 15mediummulti select
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You manage a vSphere 7 environment with 20 hosts, each with 2 x 10-core CPUs and 512 GB RAM. The environment runs 300 VMs, including a critical ERP application that uses 8 vCPUs and 64 GB RAM. Recently, the ERP VM has been experiencing periodic performance degradation, especially during month-end processing. The host running the ERP VM shows CPU ready time averaging 8%, with spikes to 20% during the processing. The host has 10 other VMs, each with 2-4 vCPUs. The cluster has DRS enabled with default settings. You suspect CPU contention. Which two actions should you take to mitigate the issue? (Choose two.)

Question 16mediummultiple choice
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A virtualized SQL server is experiencing high latency on its virtual disks. The datastore is an NFS mount on a shared NAS. Which action would most likely reduce disk latency without reducing capacity?

Question 17hardmultiple choice
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An administrator notices that a critical VM running a database has a high CPU ready time average (over 20%) on a host with 2 physical CPUs (16 cores each). The host is running 6 VMs, each with 8 vCPUs. What is the most likely cause of the high ready time?

Question 18easymultiple choice
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A vSphere administrator needs to monitor the performance of a cluster of 10 ESXi hosts. The cluster is running 200 VMs. Which tool provides real-time performance metrics and historical data with the least overhead?

Question 19hardmultiple choice
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A company has a cluster with DRS set to Fully Automated. A VM named VM1 has a reservation of 4 GHz and a limit of 8 GHz on a host with 10 GHz available. The VM is running a batch job that requires as much CPU as possible. The administrator notices that the VM's CPU usage never exceeds 4 GHz. What is the most likely reason?

Question 20mediummultiple choice
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An administrator is troubleshooting a VM that is running slowly. The VM has 4 vCPUs and 16 GB of memory. The host has 2 physical CPUs with 10 cores each, hyper-threading enabled. The administrator runs esxtop and sees that %RDY for the VM is consistently above 15%. Which action would most likely reduce the ready time?

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Frequently asked questions

What does the VCP-DCV exam test about vSphere Performance and Scaling?
vSphere Performance and Scaling questions test whether you can apply the concept in context, not just recognise a definition.
How should I use these practice questions?
Select your answer before revealing the explanation. Then read why each option is right or wrong — this active recall approach builds retention far faster than re-reading notes.
Can I practise just vSphere Performance and Scaling questions in a focused session?
Yes — the session launcher on this page draws every question from the vSphere Performance and Scaling domain. Use a 10-question session first to gauge your baseline, then move to 20 or 30 once the weak spots are clear.
Where can I practise other VCP-DCV topics?
Use the topic links above to move to related areas, or go back to the VCP-DCV question bank to see all topics.
Are these real exam questions or dumps?
These are original practice questions written to test the same concepts the VCP-DCV exam covers. They are not copied from any real exam or dump site.