[MUSIC] Welcome to week three. In the first two weeks, we talked a lot about the interview process and how to survive that technical phone screen. This week we're going to focus on what you can do after you get that interview. So you've gotten through the phone screen, now you're in the interview, and we're going to to focus in particular on a very common question that you're likely to get asked, which asks you to describe some technical work that you've done. So by the end of this week, you'll be able to clearly and/or confidently explain a solution that you've created to a technical problem. So the question that you'll be faced with almost certainly in an in-person interview sounds something like this. The interviewer will say something like, tell me about a problem you've worked on. What was the problem? How did you solve it? What was novel about your solution? The question comes in many forms, but it's a key staple of a technical interview. And unlike the questions we were looking at last week, it's actually a question you can prepare for, which is really good. So this week we're going to talk about how to prepare for that question and how to give the best possible answer for that question when you're faced with it. We're going to start by looking at a few examples from myself, from Leo and from Mia, and what I want to highlight about these examples before you watch them is that we're going to showcase different contexts, and slightly different versions of the question. So we'll be pitching to different styles of audiences, focusing on different projects. But what's most important about answering this question is, you're going to answer with something that's deeply personal, something you've worked very closely on. So you'll see Mia and Leo talk about their research, and you'll see me talk about an example from the development of these courses themselves. I'll talk about a technical challenge that we ran into when we were developing software for course three in this specialization. What I want you to do is I want you to watch these examples and focus on what we all do well. So how are we describing the problem? How are we describing the solution? What are you getting out of these descriptions? Now, we'll talk about how these would be evaluated after you watch these videos, and then we'll launch into some pitfalls and talk about how you can identify these pitfalls and avoid these pitfalls in preparing to answer this question yourself. Our goal is that by the end of the week, you'll be able to give a really solid answer to this question.