What is the primary purpose of a container image in deployment?

• A. Storing data
• B. Packaging an application and its dependencies for deployment
• C. Running a VM
• D. Managing user permissions

Answer: (B)

Container images are portable, immutable blueprints that package an application together with its runtime, libraries, and dependencies so it can run consistently in any environment. The main advantage is reproducible deployment across development, testing, and production because the same image governs the environment, reducing the “works on my machine” problem. It’s not for storing data—data should live in volumes or external storage and can be preserved separately. It isn’t a virtual machine, since containers share the host OS kernel and are lighter-weight than full OS instances. It doesn’t directly manage user permissions, though a default user can be defined inside the image. So the primary purpose is to package an application and its dependencies for deployment.