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KCNA · Question #71
KCNA Question #71: Real Exam Question with Answer & Explanation
The correct answer is C: The act of adding/removing application instances of the same application to meet demand.. Horizontal scaling involves increasing or decreasing the number of identical application instances to handle fluctuating workload demands.
Submitted by javi_es· May 4, 2026Container Orchestration
Question
Which of the following best describes horizontally scaling an application deployment?
Options
- AThe act of adding/removing node instances to the cluster to meet demand.
- BThe act of adding/removing applications to meet demand.
- CThe act of adding/removing application instances of the same application to meet demand.
- DThe act of adding/removing resources to application instances to meet demand.
Explanation
Horizontal scaling involves increasing or decreasing the number of identical application instances to handle fluctuating workload demands.
Common mistakes.
- A. Adding or removing node instances is horizontal scaling at the infrastructure level, not specifically for an application deployment itself.
- B. Adding or removing different applications does not constitute scaling a single application deployment.
- D. Adding or removing resources (like CPU or memory) to existing application instances is vertical scaling, not horizontal scaling.
Concept tested. Horizontal vs. Vertical Scaling
Reference. https://kubernetes.io/docs/concepts/workloads/controllers/horizontal-pod-autoscaler/
Topics
#Horizontal Scaling#Application Scaling#Deployment#Cloud Native Concepts
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