Question

Can somebody explain how does it matter to pass different parameters in a url,

e-g

1: www.domain.com/folder1/folder2/file.html?param=9?val=ty5?test
2: www.domain.com/folder1/folder2/file.html#param=93#val=t5y5?test=9
3: www.domain.com/folder1/folder2/file.html&param=9?val=ty5&test=90#poiu

Basically I want to know what do these three characters (#, &, ?) do in the url. I have seen them most of the times? can I use some thing other than that
e-g: www.domain.com/folder1/folder2/file.html*param=9_val+ty5@test

Answer 1

? indicates the start of the query string
& separates key value pairs of the querystring
# indicates an anchor. Here‘s more on anchor links.

Note that all three of your urls are incorrect.

Valid url:

http://domain/path/file?name=value&name=value#anc

I notice you’ve edited your question with an additional question

can I use some thing other than that e-g:
http://www.domain.com/folder1/folder2/file.html*param=9_val+ty5@test

You can use whatever you like in the part of the querystring or anchor as long as it is url encoded.