How should software engineers think about the ethical impact of their work?

Software Engineers’ ethics are now into consideration of designing properly, they even avoid making shortcuts in their work, and learning how to serve their customers well. As a result, they can prevent system failures. There were also mission statements written, their code of ethics had been redrafted and engineering curricula were redesigned. 

what class is it and how much will you pay?

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.