I seem to remember the Sun site mentioning something along the line of 300hours.
But reading the Oracle site it mentions a working week for a typical developer!!! That's 40 hours? Seems a bit on the low side?
Scale of the assignment
Obviously, the amount of time taken by a candidate to create a working solution to the assignment varies greatly. Brooks, in "The Mythical Man Month," noted years ago that programmer productivity varies by at least ten-to-one. However, a fast programmer might create a solution in about twenty hours. A more typical expectation of a time requirement might be in the order of a working week. If you spend a lot more than two weeks on the project, you might well be creating something that is more detailed than is really required, and you might want to review the scoring criteria and problem statement provided in the assignment.
Perhaps a more consistent measure of the scale of the assignment might be derived from the average number of lines of code submitted in typical passing assignments. Again, this is subject to substantial variation, but as a guide, 3500 lines of code is a reasonable estimate of the mean size of passing assignments.
realistic to look at a minimum of 6 - 8 weeks of work at 40 hours per week.
So we are talking between 240 and 320 hours - is this peoples real experiences?
That's a minimum of 6 months based on 2 hours effort, 5 days a week. Seems high!
On the other hand it. It depends too on your motivation behind doing the cert I guess. Whether just to get the cert or to learn. My motivation is to learn as much as possible, so I'd be leaning towards making my solution as good as possible.
But I guess it certainly something worth considering. If you just want to "get it working" in order to pass then possibly you would be looking at a lot less than 240 hours - worth keeping in mind.
I guess what I was highlighting was that Oracle themselves seem to gauge the level of effort required to be considerably less than the FAQ on this site suggests. I can't remember if Sun themselves gave an indication of the level of effort required - I thought they did, and I thought it was similar to what this site suggests, but I can't remember.
If you spend a lot more than two weeks on the project, you might well be creating something that is more detailed than is really required, and you might want to review the scoring criteria and problem statement provided in the assignment.
So this is worth keeping in mind when considering doing this cert. A lot of people may be put off by the hearing 240 to 320 hours are required to pass this cert.