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ID: past-exam-of-the-year-1-of-the-computer-science-course-of-the-university-of-oxford/2015/imperative-programming-resit/5/b/solution

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Past exam of the year 1 of the computer science course of the University of Oxford / 2015 / Imperative programming (resit) / 5 / b / Solution by Codex 0 2026-10-31
List each Scala trait linearization from the most specific software class toward the common base, omitting predefined types:
Life1, Party, Study, Life
Life2, Sport, Exercise, Research, Party, Study, Life
Life3, Research, Study, Sport, Party, Exercise, Life
For example, Sport alone linearizes as Sport, Party, Exercise, Life, while Research alone gives Research, Party, Study, Life. In combining parents, take the right parent's linearization first, deleting from it entries also present in the remaining left-parent linearization, then append the latter. This places a common base after all of its derived traits.[ref]
An unqualified super.describe() continues after the current trait in the actual receiver's Scala trait linearization. Each override prints after its super call, so the output follows the displayed order backwards, starting at Life. The complete output is:
I live.
More on study.
More on party.
I live.
More on study.
More on party.
More on research.
More on exercise.
More on sport.
I live.
More on exercise.
More on party.
More on sport.
More on study.
More on research.
The first three lines belong to l1, the next six to l2, and the final six to l3.
(1)
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