How can I tell if I'll be any good as a programmer?

The Guardian Technology supplement reports on some work done at Middlesex, attempting to predict how well students are likely to perform in programming. Like other Universities, they’d noted that students typically either did very well, or failed. They have therefore designed a test, to see if they can predict how well students are likely to perform. Looking at the test, it’s remarkably like the one we had to do to in the MSc interview. (Getting onto the course wasn’t dependant on getting the test right).