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    Question

    Which virtualization technique allows the guest OS to

    run without being modified and has the lowest overhead?
    A Emulation Correct Answer Incorrect Answer
    B Para-virtualization Correct Answer Incorrect Answer
    C Full virtualization with hardware assist (VT-x/AMD-V) Correct Answer Incorrect Answer
    D Binary translation Correct Answer Incorrect Answer
    E OS-level virtualization Correct Answer Incorrect Answer

    Solution

    Hardware-assisted virtualization (Intel VT-x / AMD-V): ✔ No guest modification ✔ Very low overhead Emulation and binary translation are slower; para-virtualization needs guest modification; OS-level isn't proper VM isolation.

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