[dkhenry]

I have been issuing tests to candidates for a long time now and I have used a plethora of methods to do it. What has worked the best for me was a home rolled solution of having a server they must ssh into and then having a few bash scripts that.

    Set up the user account and a default home directory.
    Runs a job out of cron to check for the user and log them out after a time period.
    Clean up after the test has been reviewed. 

I have iterated on that base idea and ended up with a pretty nice intranet portal and self service test administration system, but then I threw it out the window and started using HackerRank. Its just easier and it does all the stuff I want it to do. There are some limitations, but if you just looking to do an initial screen they work.