IPA IP 2021 Question 5

A question IPA Japan published in 令和3年度 ITパスポート試験公開問題問5, translated into English. ITPEC is based on the same exams.

Which of the following is the most appropriate explanation of cloud computing?

a)Concentrating data on a computer such as a mainframe that manages the entire system, and processing it thereb)People other than those in the information systems department operating computers themselves, and making use of them for their own work or the work of their own departmentc)Using various resources such as software and hardware on demand and in a scalable way via a network such as the Internetd)Distributing processing to multiple computers via a network, and sharing the processing results

Explanation

Using software, hardware and other resources over the Internet, on demand and scalably — that is cloud computing.

In cloud computing a provider runs servers, storage, platforms and applications in its data centres, and users take what they need over a network when they need it, paying for the amount used. Capacity can be added or released quickly as demand changes. By what is provided, services are classed as SaaS (applications), PaaS (a platform for developing and running applications) and IaaS (servers, storage and networks).

Answer (c)

Why not others:

•(a) — concentrating all data on one large central computer such as a mainframe is centralized processing
•(b) — users outside the information systems department running computers themselves for their own or their department's work is EUC (End User Computing)
•(d) — spreading processing across several computers on a network and sharing the results is distributed processing

Key rule: The marks of cloud computing are resources used over a network, on demand and scalably, usually paid by use; where the processing happens (centralized or distributed) and who operates the computer (EUC) are other ideas.

System Strategy · 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.