KCNA CPU Request Practice Question
A pod has resource requests set to 'cpu: 500m' and 'memory: 256Mi'. The node has 2 CPU cores and 4Gi memory. How many pods with the same resource requests can be scheduled on that node, assuming no other pods?
⚠ Common exam trap
Candidates often mistakenly calculate the maximum number of pods based on memory (16) instead of CPU (4), since memory appears less restrictive. However, CPU is the tighter constraint in this scenario.
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
✓
4
Each pod requests 0.5 CPU cores (500m) and 256 MiB of memory. The node has 2 CPU cores, so the CPU limit allows 2 / 0.5 = 4 pods. The node has 4 GiB of memory (4096 MiB), so the memory limit allows 4096 / 256 = 16 pods. The tighter constraint is CPU, which permits exactly 4 pods. Option B is correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
2
Why it's wrong here
Incorrect calculation.
- ✓
4
Why this is correct
CPU is the bottleneck; 2000m / 500m = 4.
- ✗
8
Why it's wrong here
That would exceed CPU capacity.
- ✗
16
Why it's wrong here
Memory allows 16, but CPU limits to 4.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.