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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): βœ” No guest modification βœ” 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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