Are you asking why someone - who is hiring a programmer, would want to read the code that a candidate might have written? Because it gives a good idea of the co

Are you asking why someone - who is hiring a programmer, would want to read the code that a candidate might have written? Because it gives a good idea of the coding style, technique, ability to tackle problems, and put together a solution, and ship that solution, all of which are very pertinent when hiring a programer.