Virtualization and Hypervisor Research
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Questions and Answers

What was the focus of the 1st generation of software solutions for server virtualization?

  • Dynamic Translation
  • Para-virtualization
  • Silicon-based virtualization
  • Full virtualization (Binary rewriting) (correct)

    • Which type of virtualization involves the guest OS being unaware that it is in an emulated environment?

  • Full virtualization (Binary rewriting)
  • Dynamic Translation
  • Para-virtualization
  • Siliconbased virtualization (correct)

    • What are two popular open source emulators mentioned in the text?

  • Microsoft Virtual Machine and VMware
  • Hypervisor and Operating System
  • VMware and Xen
  • QEMU and Bochs (correct)

    • Which generation of software solutions for server virtualization involved hardware-assisted virtualization?

    <p>3rd Generation</p> Signup and view all the answers

    What differentiates Para-virtualization from Full virtualization in server virtualization?

    <p>'Emulation layer talks to an operating system which talks to the computer hardware' in Para-virtualization but not in Full virtualization</p> Signup and view all the answers

    What aspect represents a significant difference between the 2nd Generation and 3rd Generation of software solutions for server virtualization?

    <p>'Emulation layer' in 3rd Generation but not in 2nd Generation</p> Signup and view all the answers

    What are the two classes of sensitive instructions discussed in the text?

    <p>Control sensitive and behavior sensitive</p> Signup and view all the answers

    According to Popek and Goldberg, what is the key condition for running a virtual machine with desired properties?

    <p>Sensitive instructions are a subset of privileged instructions</p> Signup and view all the answers

    In the context of virtual machines, what happens to sensitive instructions if they are a subset of privileged instructions?

    <p>They trap to the hypervisor for emulation</p> Signup and view all the answers

    What term is used to describe a conventional third generation computer that allows the construction of a VMM without timing dependencies?

    <p>Recursively virtualizable</p> Signup and view all the answers

    Which property defines a VMM's ability to control resources efficiently in virtualization?

    <p>Resource Control Efficiency</p> Signup and view all the answers

    What is the significance of having all three desired properties for running a virtual machine effectively?

    <p>Enables most instructions to run directly with minimal slowdown</p> Signup and view all the answers

    What is the main idea behind classifying instructions into privileged and sensitive instructions in a virtual machine architecture?

    <p>To determine which instructions cause a trap if executed in user mode and which change the underlying resources</p> Signup and view all the answers

    In the context of a virtual machine monitor, what is the significance of having the guest OS run in user mode?

    <p>It necessitates the interception or replacement of privileged instructions</p> Signup and view all the answers

    According to Popek and Goldberg, what is one of the goals for a virtual machine architecture?

    <p>Efficiency: Execution of most VM instructions directly on the underlying CPU</p> Signup and view all the answers

    How does a virtual machine monitor ensure that a guest OS using a different instruction set than the host OS can run on the CPU?

    <p>By intercepting or replacing privileged instructions used by the guest OS</p> Signup and view all the answers

    Why does a hypervisor need to run the guest OS directly on the CPU in a virtual machine setup?

    <p>To maintain efficiency by executing most VM instructions on the CPU</p> Signup and view all the answers

    What imposes restrictions on the instruction set for a CPU in a virtual machine architecture according to Popek and Goldberg?

    <p>The classification of privileged and sensitive instructions for trap handling</p> Signup and view all the answers

    Which approach in server virtualization allows running unmodified OSs?

    <p>Hardware-assisted virtualization</p> Signup and view all the answers

    In network virtualization, what is the main goal?

    <p>Making a physical network appear as multiple logical ones</p> Signup and view all the answers

    What special feature allows the VMM to intercept and emulate privileged operations in the guest OS?

    <p>Hardware-assisted virtualization</p> Signup and view all the answers

    Why might creating an all-sizes-fit-into-one solution be challenging in virtualization?

    <p>It is almost impossible to predict future technological advancements</p> Signup and view all the answers

    Which component runs at a more privileged ring than 0 in virtual machine virtualization?

    <p>Virtual Machine Monitor Device Drivers</p> Signup and view all the answers

    What challenge does traditional server virtualization face regarding unmodified OSs running in a virtualized environment?

    <p>Speed and Flexibility issues</p> Signup and view all the answers

    What is the primary advantage of Electronic Data Interchange (EDI) mentioned in the text?

    <p>Lower operating costs</p> Signup and view all the answers

    How do Web Services improve distributed computing interoperability according to the text?

    <p>By enabling communication between any two software components</p> Signup and view all the answers

    What distinguishes Web Services from EDI based on the text?

    <p>Usage of text-based communication protocols</p> Signup and view all the answers

    Which technology transforms a network into a library of programmatic components available to developers, as per the text?

    <p>Web Services</p> Signup and view all the answers

    What is the main benefit of Web Services being easier to debug according to the text?

    <p>Text-based communication protocols</p> Signup and view all the answers

    How do Web Services differ from EDI in terms of efficiency and cost, based on the text?

    <p>Web Services are simpler and less expensive than EDI</p> Signup and view all the answers

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