How is a container different from a virtual machine?

A container packages an application and its dependencies while using an operating-system ke el through isolation mechanisms. A virtual machine runs a guest operating system on virtualized hardware. Containers often start quickly and share more host resources, but that does not make them a complete security boundary in every environment. Images, runtime privileges, ke el exposure, and host configuration matter. VMs usually provide a distinct guest-ke el boundary at additional overhead. Choose according to isolation, compatibility, management, and workload needs rather than assuming one replaces the other everywhere.