The software engineering puzzled two of the method of reading construction

Chapter 5.5:

Referring to the model in the waterfall model, I would like to ask what is the difference between a model (mock version) and a prototype, and if it has the same functionality as a prototype, why is it called a model? If not, how are those programs tested?

The 6th chapter:

In the agile process problems and solutions, referred to a mere formality of the regular meeting. Sometimes some programmers do not find the problem (or because the program is not deep enough to find the problem). Do you still think this is innocent? Or do you mean no experience? And if the leaders misunderstand, as programmers, what should we do?

The 7th chapter:

Promote information sharing and communication in the confidentiality of the information written, but sometimes we know that the information is harmful to users (such as the disclosure of information involving users) as a programmer we have to keep secret, as a moral person, we have to stop. What choices do we make between the two roles?

And in harmony, it's easy to say, "It's not for people," and it can be difficult to do. When you want to do something wrong, others think you are right, he thinks it is unfair. If the small super because in this year performance is particularly good, did not make any mistake, the company will send him a set of villas as a reward, if the company has a little error record, will cancel the reward. Just then, he made a low-level bug error, what should you do?

The software engineering puzzled two of the method of reading construction