*Complete this quiz by checking one answer per question.*

1. In a Single-page application, the HTML is loaded once and never updated:

- [ ] true
- [ ] false

2. Why is it important to not trust data coming from user input?

- [ ] because using special characters can make the UI ugly.
- [ ] because it can contain non-sense or offensive words.
- [ ] because it can be used as vector of attack to execute malicious scripts.

3. What's the API name for sending asynchronous HTTP requests to a web server?
- [ ] `request()`
- [ ] `fetch()`
- [ ] `ajax()`