ITGSS Certified DevOps Engineer Practice Test

Which software package includes everything needed to run an application in a Kubernetes environment?

1. Service

2. Container image

3. Deployment

4. ConfigMap

The correct answer is: Container image

In a Kubernetes environment, the software package that includes everything needed to run an application is the container image. A container image encapsulates the application code, runtime, libraries, and environment variables, effectively bundling all the necessary components to ensure the application runs consistently across different environments. Container images are built using a specified base image and can be tested locally before being deployed to a Kubernetes cluster. When the image is deployed, Kubernetes takes care of creating and managing the instances of that image (called pods) to ensure the application is running smoothly. Other options like a service, deployment, and ConfigMap play important roles within the Kubernetes ecosystem but do not encompass all the components required to run an application. A service is primarily responsible for networking and exposing applications, a deployment manages the lifecycle and scaling of applications, while ConfigMaps are used to manage configuration data separately from the application code. Thus, while these other components are essential for overall application management and deployment, they do not include the actual application code and its execution environment, which is the primary purpose of the container image.