55. A programmer working on a particular sensor for a self-driving car decides that the data-processing part of the code needs to have four separate functions. The programmer then codes each of these four functions. Which two Waterfall approach phases are involved?
Answer: D
Design and implementation
The phases of design and implementation are involved in the process described, as the programmer first designs the four separate functions and then implements them in code.
A) Implementation and testing
This option is incorrect because while implementation is indeed a phase in the Waterfall model, testing is a subsequent phase that occurs after the implementation. The question specifically pertains to the stages where the functions are designed and coded, not tested.
B) Analysis and design
This choice is not correct because analysis refers to the stage where requirements are gathered and defined, while design involves planning how to code those requirements. The question focuses on the actual coding part, which falls under implementation rather than just design.
C) Analysis and implementation
This option is incorrect as it includes analysis, which is the initial phase of understanding what needs to be developed. The scenario emphasizes the actual coding of the functions, thus making implementation the more relevant phase alongside design.
D) Design and implementation
This is the correct choice as it accurately reflects the two phases involved in the scenario. The programmer first designs the functions to meet the requirements and then implements them in code, representing a clear progression through the Waterfall model.
Conclusion
The correct answer highlights the essential phases of design and implementation, which are crucial for developing software components like functions for a self-driving car sensor. Other options fail because they either include phases that do not directly relate to coding or mix phases inappropriately for the context of the question.