We are currently filtering some applicants for a technical position. We invited 4 applicants to take a coding test from a coding test site. 3 out of the 4 chose to copy solutions that they found (on stackoverflow) and submit them as their solutions. One didn't modify the answer at all, one modified it slightly, and the third made modifications to the structure of the solution but still based it on the on-line solution.
I've been looking around to see what the general consensus is for something like this, including this thread.
My personal, professional opinion is that this is grounds to disqualify the applicant immediately - however I'm not the only person evaluating this situation. Others are of the opinion that perhaps the test was too difficult for the position we were hiring. Another suggestion is that this sort of behavior may be considered 'acceptable' since a lot of us use resources like Google and StackOverflow to do our daily jobs.
Our 4th candidate did NOT copy and paste a solution from the internet, (s)he did original work.
How have others dealt with this? Would you give someone who did this as part of the job interview a second chance?