ITGSS Certified DevOps Engineer Practice Test

What is the abstraction in Kubernetes that defines a logical group of Pods and how to access them?

1. Deployment

2. Pod

3. Service

4. Node

The correct answer is: Service

In Kubernetes, a Service is the abstraction that defines a logical grouping of Pods and provides a way to access them. When applications are deployed on Kubernetes, they typically consist of multiple instances of Pods, which are the smallest deployable units that can be created, scheduled, and managed. However, Pods themselves are ephemeral; they can come and go, making direct access to them unreliable for other services or applications that need to communicate with them. The Service abstraction addresses this by providing a stable endpoint—typically a DNS name—that applications can use to reach the Pods belonging to a specific application. When a Service is created, it can be configured to target a set of Pods based on labels. This allows users to define rules for how the Service should route traffic to the underlying Pods, enabling load balancing and providing a consistent interface despite the dynamic nature of Pod scheduling. By defining a Service, Kubernetes allows developers and operators to interact with Pods without needing to know the specific instances or IP addresses of each Pod. This abstraction not only simplifies connectivity but also enhances resilience, as the Service can automatically redirect requests to healthy Pods if any become unavailable. In contrast, a Deployment manages the lifecycle of Pods, but it does not provide direct access like a Service does. A Pod