VCP-DCV vSphere Performance and Scaling Practice Question
Which two factors most directly influence vSphere NUMA scheduling decisions for a VM? (Choose two.)
⚠ Common exam trap
VCP-DCV often tests whether candidates confuse NUMA scheduling factors with resource allocation settings like reservations or limits, which affect admission control but not NUMA placement.
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
✓
Host NUMA node topology
Option A (Host NUMA node topology) is correct because vSphere's NUMA scheduler bases its placement decisions on the physical NUMA node layout of the ESXi host, including how many nodes exist, how many cores and how much memory each node contains, and the relative latency between nodes; a VM's vCPUs and memory are placed to keep them within a single node whenever possible. Option C (Number of vCPUs) is correct because a VM's vCPU count determines whether it can fit inside one NUMA node: if the vCPU count exceeds the cores in a single node, the VM becomes wide and vSphere must span multiple NUMA nodes, changing the scheduling behavior (and potentially enabling vNUMA). Option B is not a primary factor because a memory reservation affects admission control and whether memory is backed by reserved physical pages, not the NUMA placement logic itself. Option D is unrelated since a VM storage policy governs datastore placement and storage services such as IOPS limits or encryption, not CPU/memory NUMA scheduling. Option E is also unrelated because the virtual machine version (hardware compatibility level) determines available virtual hardware features, not how the NUMA scheduler places the VM's vCPUs and memory.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Host NUMA node topology
Why this is correct
The host's physical NUMA node topology determines which memory and CPU resources are local to each other, so vSphere bases its initial placement and any rebalancing on that layout. Without knowing the node boundaries, the scheduler cannot keep a VM's vCPUs and memory within one node.
- ✗
VM memory reservation
Why it's wrong here
Memory reservation influences NUMA scheduling because a reservation larger than a single NUMA node's free memory forces wide-VM placement across nodes. It tempts as it does affect placement, yet the two factors the exam expects are VM vCPU count and virtual NUMA topology, which directly drive node affinity.
- ✓
Number of vCPUs
Why this is correct
NUMA scheduling depends primarily on a VM's vCPU count and its configured memory size, which determine how the VM's virtual topology maps onto physical NUMA nodes. The number of vCPUs directly influences whether the VM spans multiple NUMA nodes.
- ✗
VM storage policy
Why it's wrong here
Storage policy controls datastore placement, I/O limits and replication, none of which the NUMA scheduler reads when placing vCPUs and memory. It is tempting because policies shape VM behaviour broadly, and it would be correct when the question concerns storage tiering or SPBM compliance.
- ✗
Virtual machine version
Why it's wrong here
VM version governs hardware compatibility and available virtual devices, not NUMA placement; the scheduler keys on memory size and CPU topology. It is tempting because upgrading the version unlocks features, and it would matter when a VM needs a capability the current version cannot expose.
Go deeper
Related to this question
About these practice questions
One of 281 original VCP-DCV practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official VMware exam blueprint
This VCP-DCV practice question is part of Courseiva's free VMware 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 VCP-DCV exam.