CKAD Services and Networking 2

Question 1

What is an Ingress resource used for in Kubernetes?

Accepted Answer

Exposing HTTP/HTTPS routes from outside the cluster to services within it

Answer

An Ingress manages external HTTP/HTTPS access to cluster services, supporting path-based and host-based routing with TLS termination.

Question 2

Which component is required in the cluster for an Ingress resource to function?

Accepted Answer

Ingress Controller (e.g., nginx-ingress)

Answer

An Ingress resource only defines routing rules; an Ingress Controller (like nginx-ingress or Traefik) actually implements those rules.

Question 3

What does a Network Policy's 'podSelector: {}' (empty selector) in the 'spec' match?

Accepted Answer

All pods in the namespace

Answer

An empty podSelector '{}' matches all pods in the namespace where the NetworkPolicy is applied.

Question 4

Which field in an Ingress spec routes requests with path '/api' to a backend service?

Accepted Answer

spec.rules[].http.paths[].path

Answer

Ingress path-based routing is configured under 'spec.rules[].http.paths[]', where 'path' specifies the URL prefix and 'backend' the target service.

Question 5

What is the purpose of a headless Service (clusterIP: None) in Kubernetes?

Accepted Answer

To allow direct DNS-based discovery of individual pod IPs instead of a virtual IP

Answer

A headless service returns individual pod IPs in DNS responses rather than a single virtual IP, enabling direct pod addressing (used with StatefulSets).

CKAD - Certified Kubernetes Application Developer Practice Test

CKAD - Certified Kubernetes Application Developer Practice Test

CKAD Services and Networking 2