ITPEC FE Subject A April 2025 Question 11
ITPEC FE Subject A April 2025 — Question 11 of 60
Cloud Service Models (IaaS / PaaS / SaaS) — identify the correct benefit of migrating to cloud.
PaaS handles platform management, OS updates, and patching — reducing installation and operation burden.
Why not others:
- (a) IaaS + high availability — IaaS provides raw infrastructure; high availability is NOT automatically guaranteed by all providers, and migration is not "easy"
- (b) SaaS + company-specific functions — SaaS delivers ready-made software; customizing company-specific functions is harder, not easier
- (d) SaaS + flexible dev environment — SaaS is a finished product, not a development platform; IaaS or PaaS would suit dev/test needs
Key rule: IaaS = infrastructure (you manage OS+), PaaS = platform (provider manages OS+), SaaS = software (provider manages everything).
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