Subject
Computer Science
Topic
Computer Fundamental
Which statement best distinguishes OS 'kernel mode/user mode' from CPU modes such as Real, Protected, and Long Mode?
Which statement best distinguishes OS 'kernel mode/user mode' from CPU modes such as Real, Protected, and Long Mode?
a)
They are always identical termsb)
User mode means Real Modec)
Kernel mode means Safe Moded)
Kernel/user mode usually describes privilege level within an execution mode, while Real/Protected/Long describe architectural execution modesExplanation
Operating systems commonly use privilege levels such as Ring 0 and Ring 3 within Protected or Long Mode; this is different from the architectural-mode names themselves.Related questions
According to the master PDF, which CPU execution mode provides memory segmentation and privilege protection rings for isolating applications from the kernel?Which x86 execution mode provides the basic 8086-style programming environment without Protected Mode privilege rings?Which processor family introduced x86 Protected Mode?Which x86 processor extended Protected Mode with major 32-bit capabilities?Which x86 mode was introduced with the 80386 to support execution of 8086-style programs under a protected multitasking environment?Which execution mode is associated with x86-64 64-bit operation?What is Compatibility Mode in x86-64?Which mode is entered by a System Management Interrupt (SMI)?