Frontend

What is the fundamental difference between storing data in localStorage and in cookies?

Have you ever had to mock API data? How did you do it?

How was the frontend part of the application documented?

Is there experience working with WebSocket and long polling?

What are the options for positioning elements on a page (CSS position)?

What is the Critical Rendering Path and what are its main stages?

What HTTP status should be returned upon successful object creation?

What is Change Detection in Angular and how does the OnPush strategy differ from the default strategy?