How does one convert a text in .pdf format to .doc format?One of my friends is a teacher, and asked me to help him convert a question paper from...

There are a couple of ways to convert a .pdf to a .doc
format. How you choose to go about it depends somewhat on whether this is going to be a
one-time deal, or whether it's something that you need to do on a regular basis. If you
need to do it often, then it's time to consider either buying a full copy of Adobe
Acrobat and being able to edit the pdf documents without doing a conversion at all, or
downloading one of the many programs or add-ons available to do the conversion in your
computer. If that's what you are looking for, the third link below is an example of such
a product, although there are a number of others out there as
well.

For a once in a while issue, there are several online
services that will do a conversion for free - you upload your file to them, tell them
what type you'd like it converted to, and wait for the download link to appear. When I
need to do this I go to href="http://zamzar.com/">zamzar.com (the first link below). Short files of
a page or two usually are converted within minutes; larger files may take an hour or
two. If the document has illustrations, charts, or unusual fonts, those may not come
through well, so be sure to read over the converted document carefully to make sure it
is what you expect.