During an application modernization initiative, your team considers replacing existing virtual machines with containers. Which statement best explains how containers differ from VMs in a way that can increase compute density and reduce startup time?
Both virtual machines and containers embed their own complete guest operating system; containers simply use a smaller Linux distribution.
Virtual machines always run directly on bare-metal servers, whereas containers can run only inside a virtual machine layer.
Containers share the host OS kernel, isolating applications in user space without requiring a separate guest operating system for each workload.
Containers give applications direct access to physical hardware and therefore eliminate the need for any operating system layer.
Containers package application code and its libraries in isolated user spaces that all share the underlying host operating-system kernel. Because a separate guest OS is not needed for each workload, containers can be created or destroyed in seconds and many more of them can fit on the same host. In contrast, each virtual machine runs its own full guest operating system, which consumes additional CPU and memory and lengthens boot time. The other statements are incorrect: containers do not run without an OS, they do not embed a separate guest OS, and they are not limited to running inside virtual machines only.
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What is the host OS kernel?
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How do containers increase compute density compared to virtual machines?
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Why is container startup time shorter than virtual machine startup time?
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What is the host OS kernel and how does it enable container efficiency?
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