KCSA Kubernetes Threat Model Practice Question
An attacker gains execution in a container and attempts to perform a denial of service attack on other workloads sharing the same Kubernetes node by consuming all available CPU and memory resources. What Kubernetes feature prevents this cross-workload resource exhaustion?
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
✓
Container Resource Requests and Limits (CPU and memory)
ResourceQuotas and LimitRanges/Container Resource Limits (requests and limits) ensure that containers cannot exceed allocated compute resources, preventing noisy neighbor and starvation attacks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ValidatingWebhookConfiguration rejecting pod creations
Why it's wrong here
Admission webhooks check object creation requests, but do not throttle ongoing runtime resource usage.
- ✗
NetworkPolicy egress blocking rules
Why it's wrong here
Network policies manage network traffic flow, not compute resource consumption.
- ✓
Container Resource Requests and Limits (CPU and memory)
Why this is correct
Setting resource limits enforces cgroup constraints that cap CPU and memory usage per container, preventing resource starvation on the node.
- ✗
ClusterRoleBindings restricting RBAC permissions
Why it's wrong here
RBAC restricts API actions, not physical CPU or memory consumption.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation 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 KCSA exam.