Can I know why my question was updated.

You put n instead of and in one sentence and the reviewer corrected it for you. The use of such abbreviations, as used in txtspk, is strongly discouraged here.

Certainly, there are some changes; and the user who tried to help you did not choose to inform you about it in a comment. You can always compare the version by saving a fragment of the page in two different version. Perhaps, automatic file compare can help you to see the difference you naked eye failed to see. :-)

The link to that member profile is recorded in the history of your post, so you can always ask her/him about it in your comment. I think you can add comment on your post; the person who edited your post should get a notification.

[EDIT]

Please see: Tadit Dash, http://www.codeproject.com/Members/taditdash[^] has added v2 with his comment: "Updates in content. 3 changes had been made.". Please see:

http://www.codeproject.com/script/Articles/ListVersions.aspx?aid=432775[^].

Good luck,

—SA

In general, edits are made for multiple reasons, like adding code tags and other formatting improvements, some people make grammar and spelling fixes, etc.

As long as the question hasn't been radically changed and the meaning lost, I wouldn't worry about it. Edits are made to help you get answers to your question! And in the case that a malicious edit is made (I've never seen one, but it's possible I guess) you can edit it back yourself with the "Improve question" button.