magazine

And,
you can make interviews with professionals in this site

not a bad idea,i hope?

Ahh.. so you are talking about the magazine contents.
I would say, it depends on what your readers interested in and what you want them to show. Here are some examples.

1. You can write about latest trends in software development
2. You can write on latest languages and tools
3. You can also talk about some cool online communities like this one
4. You probably also want to talk about jobs, training
5. Get some feedback from your professors and other students

sir in my college we are going to organize tech fest for that i have the responsibility to publish or develop the magazine  for only my computer branch.For that i want to know what type of articles i have to include in that magazine and actually i have no idea what to do plz help 

What kind of magazine are we talking about? Just departmental, local or for everybody? Print or online? Free or paid?