What is the container engine being used by Docker?

What is the container engine being used by Docker?

• A. runc
• B. CRI-O
• C. containerd
• D. dockerd

Answer: (C)

Containerd is the container engine Docker uses. In Docker’s architecture, the Docker daemon (dockerd) delegates container lifecycle management to containerd, which coordinates images, containers, and storage. Inside containerd, the actual execution is performed by a low-level runtime such as runc. So containerd is the engine Docker relies on, while dockerd is the daemon, and runc is the runtime it uses under the hood. CRI-O is a Kubernetes-focused runtime and not part of Docker.

Containerd is the container engine Docker uses. In Docker’s architecture, the Docker daemon (dockerd) delegates container lifecycle management to containerd, which coordinates images, containers, and storage. Inside containerd, the actual execution is performed by a low-level runtime such as runc. So containerd is the engine Docker relies on, while dockerd is the daemon, and runc is the runtime it uses under the hood. CRI-O is a Kubernetes-focused runtime and not part of Docker.