Smallest installable part of the product from installation developers perspective
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feature
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component
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pre-requisite
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keyfile
B
Correct answer
Explanation
From an installation developer's perspective, a Component is the smallest installable unit. Components contain the actual installation items: files, registry keys, shortcuts, etc. Each component has a unique GUID and is installed as an atomic unit - either all its items are installed or none. Features group together components to present user-facing selections. Developers work with components; users interact with features.