01
An operating system manages hardware resources and provides abstractions that let programs run without controlling every device directly.
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02
The OS multiplexes CPU time through scheduling, isolates address spaces with hardware-supported virtual memory, handles interrupts and exceptions, mediates device access, and persists named data through file systems.
supported03
Process tables, system-call traces, file permissions, virtual-memory mappings, scheduler metrics, and device logs expose OS behavior.
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