ITPEC FE Subject A April 2025 Question 11
Which of the following is a merit of migrating an internal business system to a cloud service?
Explanation
With PaaS the provider manages the platform and OS updates — which cuts the user's installation and operation work.
The three service models differ in how much the provider manages:
- •IaaS: servers, storage and network; the user still manages the OS, middleware and applications
- •PaaS: also the OS and middleware (the platform); the user manages only its applications
- •SaaS: the whole application; the user only uses it
With PaaS, OS patching and platform maintenance move to the provider, a real reduction in installation and operation effort.
Answer (c)
Why not others:
- •(a) — availability differs by provider and is set in each SLA; not every provider guarantees very high availability, so such a migration needs careful checking, not less
- •(b) — SaaS offers standard functions shared by many customers; company-specific functions are hard to reproduce there, so migrating them gets harder
- •(d) — SaaS delivers a finished application, not a development environment; flexible temporary environments for development come from IaaS or PaaS
Key rule: Moving from IaaS through PaaS to SaaS, the user manages less and can customise less.
System Strategy · AI-written, may contain errors
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.