Which of the following is true about Docker containers?

The assertion that containers use fewer resources than virtual machines is accurate for several reasons. Containers are designed to share the host operating system's kernel, enabling them to run multiple applications without the need for a full operating system instance for each one. This allows containers to be lightweight, consuming significantly less memory and CPU compared to virtual machines, which require their own operating systems and virtualization layers.

Because of their architecture, containers start up much faster than traditional virtual machines, which often need a longer boot process due to their individual operating systems. Additionally, since multiple containers can run on the same host without the overhead of several operating systems, this maximizes resource efficiency. This is particularly beneficial in environments requiring high application density and quick scaling capabilities, such as microservices and cloud-native applications.