What is the difference between virtualization and containerization?

What is the difference between virtualization and containerization?

• A. Containerization runs multiple full OS instances on a hypervisor.
• B. Virtualization runs isolated apps sharing a host OS kernel.
• C. Virtualization runs multiple full OS instances on a hypervisor; containerization runs isolated apps sharing a host OS kernel.
• D. They are identical.

Answer: (C)

The key idea is how isolation and resources are organized. Virtualization uses a hypervisor to create multiple virtual machines, and each VM runs its own complete operating system. That means you get separate OS environments with their own kernels, memory, and drivers, all emulated on top of the physical hardware. Containerization takes a different route: it runs isolated applications inside containers that share the host operating system kernel. Each container has its own user space, libraries, and dependencies, but they all use the same kernel as the host, which makes containers much lighter and faster to start than full VMs. So the accurate description is that virtualization runs multiple full OS instances on a hypervisor, while containerization runs isolated apps sharing a host OS kernel. The other ideas mix up these distinctions—for example, containers don’t include a full OS per container, and virtual machines don’t share a single host kernel.

The key idea is how isolation and resources are organized. Virtualization uses a hypervisor to create multiple virtual machines, and each VM runs its own complete operating system. That means you get separate OS environments with their own kernels, memory, and drivers, all emulated on top of the physical hardware. Containerization takes a different route: it runs isolated applications inside containers that share the host operating system kernel. Each container has its own user space, libraries, and dependencies, but they all use the same kernel as the host, which makes containers much lighter and faster to start than full VMs.

So the accurate description is that virtualization runs multiple full OS instances on a hypervisor, while containerization runs isolated apps sharing a host OS kernel. The other ideas mix up these distinctions—for example, containers don’t include a full OS per container, and virtual machines don’t share a single host kernel.