Discussion
Put the phases of the classical development cycle in order.
1. Integration and system test 2. Requirements and specification 3. Implementation and unit test 4. Architecture and detailed design
Answer: D
Correct answer: 2, 4, 3, 1
Requirements come first, because nothing can be designed until what the product must do is settled. Architecture and detailed design follow, then implementation with unit testing of the parts, and finally integration and system test of the whole. The order is forced by dependency, and it is the same whether the process is run once as a waterfall or many times in an iterative cycle.
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