General Questions in Front end developer Interview - Part 1

1. What are some advantages/disadvantages to testing your code?
2. What tools would you use to test your code's functionality?
3. What is the difference between a unit test and a functional/integration test?
4. What is the purpose of a code style linting tool?
5. What tools would you use to find a performance bug in your code?
6. What are some ways you may improve your website's scrolling performance?
7. Explain the difference between layout, painting and compositing.