Yet another react enthusiastic speaking about angular 4 without knowing it deeply. A lot of wrong statements here. Truth is that:
1. Angular 4 comes with native components future proof to be replaced by the web components, react does not has, indeed react components are just a concept of code structure, not even comparable…
If you can’t answer this question, you’re a junior developer. I don’t care how long you’ve been coding.
And I would say, I don’t care how long you’ve been interviewing but you’re not good for hiring devs. :P