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Layered View of Legacy Systems

publish date: 2026/06/23 19:43:6.031468 UTC

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Sort the four layers of a legacy system from the lowest (foundational) layer to the highest layer.

Platform and infrastructure software
Business processes
Hardware
Application software

Correct Answer

(1) Hardware
(2) Platform and infrastructure software
(3) Application software
(4) Business processes

Explanation

The layered view of a legacy system, from lowest to highest, is: hardware, platform and infrastructure software, application software, and business processes. Each layer depends on and interfaces with the layer immediately below it.

Reference

Software Engineering, Ian Sommerville, 10th edition

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