350-601 Compute Practice Question
During a capacity planning review, an engineer notices that a UCS domain with 8 blades (each with 16 cores) is using 70% CPU average. The environment runs VDI workloads. Each VM requires 2 vCPUs and 4 GB RAM. The hypervisor uses 1:1 CPU oversubscription. How many additional VMs can be deployed before reaching 100% CPU utilization?
⚠ Common exam trap
Cisco often tests the trap of confusing CPU utilization percentage with the number of vCPUs already allocated, leading candidates to incorrectly calculate remaining capacity by applying the percentage to the total VM count rather than to the total vCPU count.
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
✓
19
The UCS domain has 8 blades × 16 cores = 128 cores. With 1:1 CPU oversubscription, the hypervisor can allocate 128 vCPUs. Each VM requires 2 vCPUs, so the maximum VMs are 128 / 2 = 64. Currently at 70% CPU, 0.70 × 128 = 89.6 vCPUs are used, meaning 89.6 / 2 = 44.8 VMs (round to 45 VMs). The remaining vCPUs are 128 - 89.6 = 38.4, allowing 38.4 / 2 = 19.2 additional VMs, so 19 VMs can be deployed before hitting 100% CPU utilization.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
19
Why this is correct
38 remaining vCPUs / 2 per VM = 19.
- ✗
23
Why it's wrong here
Incorrect calculation.
- ✗
17
Why it's wrong here
Incorrect calculation.
- ✗
21
Why it's wrong here
Incorrect calculation.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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