Programming by coincidence as the PragProg says (someone has already posted the link).It's extremely common here in most Indian companies, especially with freshers.
Also known as shotgun debugging, where you randomly poke at the relevant portion of the source code in the hope that the bug will magically vanish. I think the habit is formed early on, when most of the mistakes are things like syntax errors or off-by-one problems, where certain types of random tweaking actually can be somewhat effective.
