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| Definition: 3-tier application architecture | | A 3-tier application architecture is a modular client-server architecture that consists of a presentation tier, an application tier and a data tier. The data tier stores information, the application tier handles logic and the presentation tier is a graphical user interface (GUI) that communications with the other two tiers. | | |
| Definition: waterfall model | | The waterfall model is a linear, sequential approach to the software development life cycle (SDLC) that is popular in software engineering and product development and emphasizes a logical progression of steps. | | |
| Definition: fault injection testing | | Fault injection is a testing process which deliberately introduces errors to a system to ensure the system can withstand the error and recover. | | |
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