HTML Basics

Question 1

HTML is a case insensitive language

Answer 1

we type everything in lower case except the DOCTYPE itself which is also a convention, no rule as such

Answer 2

This tells browser that this document is html5 document

and previous versions of html have very ugly looking DocType

Question 3

Image tag does not have any closing tag

Answer 3

because image element can not have any child elements

in versions prior to html5, we used to put the closing tag for image
<img></img>

Question 4

RIght click on your code anywhere and open with live server

Answer 4

It opens on 127.0.0.1:5500

127.0.0.1 - local host ip