Regarding submitting a form.... What will be the response after submission of Form?

SE123

Hi,

I am using a form where I am having various textboxes,checkbox etc. I am submitting the form through action="post" where my servlet invokes and save the form values. Now I am having few questions

1) After processing what will I return from my servlet?

2) Let's say if I use response.getWriter().write("OK"); what will be the flow between servlet and fron end i.e. component ?

3) Can I pass the same DCR as document to servlet through request which I am using in content xml to process the component and how can I achieve this?