This may be a strange question, but if you designed the whole web page in Photoshop for example can it still be coded and have the functionality of a site that is just done in Notepad++ for example using HTML and CSS? A can a professional website be created this way or would it be seen as a bit of a beginner?

I'm not too sure what you're actually asking.

 

Photoshop is used to design the website. As a designer I give developers a Photoshop PSD file that they can use to get dimensions, colours, fonts, etc. They then translate this design into a working site through HTML, CSS, JQuery, etc. You can export HTML files from Photoshop, but I wouldn't ever do this as it's outputs very dated code (tables and images, eurgh).

 

You could create a site solely in Notepad++ or any text editor, but without a design to follow, you're basically working blind, which I wouldn't recommend.

You can't design a web site in an image editor per say... all that does is create an image of what a given page may look like. While you can use this technique to draft out visual ideas the real magic happens when try to recreate it using HTML and CSS into a real working document.