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kernel

AI security interview questions tagged kernel, across every topic.

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Concepts behind "kernel"

Explanations of the mechanisms these questions rely on.

Foundational
Systems & OS Security
How the Kernel Isolates ProcessesThe CPU runs applications in an unprivileged mode and the kernel in a privileged one. Each process gets its own virtual address space through page tables only the kernel can change, plus credentials and handles the kernel checks on every request. Programs reach privileged operations only through system calls, where the kernel must treat every argument as hostile. Isolation is deliberately relaxed through debugging interfaces, shared memory and IPC, and it collapses entirely if the kernel itself is exploited, which is why containers sharing one kernel are a weaker boundary than virtual machines.
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