ReactJs Interview | 🎉 Selected | ReactJs & JavaScript | Experienced

JS Questions asked in this interview are:
1). What is hoisting in JS?
2). How it works?
3). Does hoisting work with all the variables, and Why?
4). Diff. b/w "let" and "var"?
5). What is Event Loop?
6). What is the precedence in Event Loop? ( between Promise() and setTimeout() )
7). What is the Diff. b/ "setTimeout()" & "setInterval()"?
8). What are the ES6 features you have used?
9). Where do you mostly use Rest Operator?