IPA IP 2022 Question 99

Topic: System Component

A question IPA Japan published in 令和4年度 ITパスポート試験 公開問題 問99, translated into English. ITPEC is based on the same exams.

Same question on ITPEC: Oct 2025 Q16

Among the descriptions A through C below concerning the effects that are obtained by simultaneously running multiple virtual servers on one (1) physical computer, which of the following lists all and only the appropriate descriptions?

A:Each virtual server can run an OS with a different version, and the resources of the physical computer can be utilized effectively.B:The throughput that is gained when the number of virtual servers is increased is the same as when the number of physical computers is increased by the same number.C:A volume of data that is the same as the capacity of the HDD on the physical computer can be simultaneously recorded on all of the virtual servers.

Explanation

A only — virtualisation lets one physical computer run several OSs and share out its otherwise idle resources, but it adds no capacity.

  • •A: appropriate. Each virtual server is a separate machine to its OS, so the servers can run different OSs or different versions of one OS side by side, and consolidating them keeps the physical computer's CPU, memory and disk busy instead of idle.
  • •B: not appropriate. The virtual servers share the one physical computer's CPU and memory, and virtualisation itself costs some overhead. Adding physical computers adds hardware; adding virtual servers only divides the same hardware more ways.
  • •C: not appropriate. The virtual disks all live on the physical HDD, so together they can hold no more than its capacity; each server cannot record a full HDD's worth at the same time.

Answer (a)

Why not others:

  • •(b) A, C — C is wrong: the virtual servers share one HDD rather than each getting its full capacity
  • •(c) B — leaves out A, which is true, and B is wrong: more virtual servers do not add processing power
  • •(d) C — leaves out A, and C is wrong

Key rule: Virtualisation raises the utilisation of one machine's resources and allows different OSs on it, but the virtual servers together can never exceed the physical machine's CPU, memory or storage.

System Component · AI-written, may contain errors

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This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.