Questions after learning software engineering

1. It must be extremely difficult to start writing an app from scratch, and I feel that applying it after the framework is found and then writing it can shorten our working hours and be more consistent with the tasks of our future work. So what I want to ask is, how to better find the source code that can be used and improve it?

2. Our group is on the surface of the division of labor, but in the end, we will certainly be working together to write an app, so how to do different people programming between the call? Are we going to record all the data about each function and circulate it to each other? So what if we're going to add new functions and circulate them to each other?

3. What are some of the things we can do to improve the speed of running an app that we've written to optimize?

4. I think to see some of the simple already compiled app source code for our help far more than their own through the book to get help, then how to find some of the simple app has been compiled source code?

5. We all know that the user experience is important, but how can we know the user experience is good or bad? In addition, the interface beautiful is also very important, but for our team of several programmers, how to do a good job of the interface aesthetics?

Questions after learning software engineering