Which statement about a container image is accurate?

Which statement about a container image is accurate?

• A. It is a running instance of software
• B. It is a portable self-contained bundle of software and dependencies
• C. It is a host-level process
• D. It is a network policy for containers

Answer: (B)

A container image is a portable, self-contained bundle of software and its dependencies. It acts as a template that includes the application code, runtime, libraries, and other required files, all packaged in immutable layers so the same image can run consistently on any compatible container runtime and host. When you actually run something, a container is created from that image and executes as a running process; the image itself isn’t a running instance. It’s also not a host-level process or a network policy—that’s something that governs execution or networking, not the image artifact. Images are typically stored in registries and pulled by a runtime to instantiate containers, benefiting from shared read-only layers to keep storage efficient.

A container image is a portable, self-contained bundle of software and its dependencies. It acts as a template that includes the application code, runtime, libraries, and other required files, all packaged in immutable layers so the same image can run consistently on any compatible container runtime and host. When you actually run something, a container is created from that image and executes as a running process; the image itself isn’t a running instance. It’s also not a host-level process or a network policy—that’s something that governs execution or networking, not the image artifact. Images are typically stored in registries and pulled by a runtime to instantiate containers, benefiting from shared read-only layers to keep storage efficient.