Sup techlife! I don't think there is a particular look. HOWEVER for the job interview a business suit is a MUST, also you should take care of person hygiene, that is make sure you are clean showered, shaved, AND you have brushed your teeth. You can probably find YouTube videos on how to handle a job interview that can help.
As for the job itself, once you get it, they will tell you what you can wear while working. IF you get the motherboard assembly job most likely they will provide a uniform OR a "clean suit" That is something you must put on in order to work in a clean room, where electronics are assembled. For a desk job, most likely business or business casual will be in order, BUT as I said they will inform you.
Good luck bro!
