KCSA Kubernetes Security Fundamentals Practice Question
An application pod needs to access the Kubernetes API server securely. How does Kubernetes authenticate the pod by default when it communicates with the API server?
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
✓
Using a ServiceAccount bearer token mounted inside the pod's filesystem.
Kubernetes automatically mounts a ServiceAccount token into the pod's filesystem, which the pod sends as a Bearer token to authenticate with the API server.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Using static username and password credentials stored in environment variables.
Why it's wrong here
Static passwords are not used for default pod authentication.
- ✓
Using a ServiceAccount bearer token mounted inside the pod's filesystem.
Why this is correct
Pods authenticate to the API server via the projected ServiceAccount token.
- ✗
Using mutual TLS (mTLS) client certificates generated by the kubelet on startup.
Why it's wrong here
While kubelet uses client certs to talk to the API server, pods themselves use ServiceAccount tokens.
- ✗
Using SSH keys stored in the pod's root directory.
Why it's wrong here
SSH keys are not used for API server authentication.
About these practice questions
This KCSA question is part of Courseiva's 320-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. 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 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.