I have been rejected from a company that i applied for a job and sent an example application for them. The feedback was like that. 1- What means codebase here ? The example has a View controller with 3 buttons only. 2- Is there a source that i can learn unit test in a fast way ? 3- Do you put comments often while you are coding ? I generally use pragma mark 4- What means bad styling ? 5- What means no physical layouting ? Here is the simple application i developed for them. https://github.com/erdinckolukisa/GoEuro Can you criticise my code please ?