Question Does it work if I put an iso on the sd card ?

[Bertie Beetle]

Does it work if i just put an iso on the sd card ?

 

[TerryLaze]

Does it work if i just put an iso on the sd card ?

Does what work?!
If you want the pi to boot up from the sd you have to create a bootable sd card.
If you use your pi as an emulator box then yes, depending on what file format the emulator can use, most that emulate cd based systems can read iso files.