Any sides effects if installed and were running on same machine???? for study purposes not to be used as remote web server!!!

you can run both on the same machine, but not on the same port at the same time. you can set one for the standard port and the other for port 81. You would access the different port like this

http://localhost:81

The other option is to keep the same port but you would need to stop one service and start the other.....the two do not like sharing ports.

Also, it would not be a good idea to have the root for both in the same directory.

No ill effects so long as they have different IP's or different ports.

If they both use the same ports incoming requests wouldn't know which one to answer. :)

Recommendation: different IP's