An answer to the question asked earlier about "why didnt you choose the other 4 coys but the 5th": Just tell them that you will be applying to those companies too. From my experience, companies like to employe people who are sought after by their competitors. That's assuming that you cant find a significant difference between them. If the 5th company is a niche company, then you have to think of something else to say.

Remember to tell them what you learned from the failure and how you can do better next time. Don't just say I failed to do so "full stop".

Do some research on the company, find out what is your job nature, scope etc, find out anything you can about the company. For the first part of the question, i think you should try to match yourself with the culture they put on the website -> sometimes, quite deliberately but you have to show them your sincerity.

Then, for the second part of the question, you can tell them that you can do as what the job description stated as you are confident with your learning capabilities.-> provide evidence, quote some events/job experience/uni experience