In many architectures, such as the three- and four-tier architectures (Figures land 2), the storage of persistent
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In many architectures, such as the three- and four-tier architectures (Figures land 2), the storage of persistent objects is handled by a dedicated layer. In your opinion, which design goals have lead to this decision? Figure 1 Three-tier architectural style (UML component diagram). Objects are organized into three layers realizing the user interface, the processing, and the storage.
Figure 2 Four-tier architectural style (UML component diagram). The Interface layer of the three-tier style is split into two layers to enable more variability on the user interface style.
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