I took the Ca. test, yes it was 20 years ago but from what I hear not much has changed. I didn't even study, I didn't even have the required 4 years, maybe 2-1/2 and still passed it with flying colors the very first time. They don't even check your experience!
You have no clue what a real Master Plumbers test is like until you take one from a state like Mn., IL, etc. The test is around 5 hours long. It's in four sections if you're taking the Masters. You better be prepared to size a commercial 8 story building for water and dwv using fixture units, it's not horseshoes, you have to get it exact. You better know how to draw in all the drains, branch vents, vent stacks and stack vents, yoke vents, battery circuit vents etc..
You better know how to draw isometric drawings of water and dwv and then size them. You better know how to do your elevations for your drain rough in's. Once again, it has to be exact to the fraction. You also have to size a commercial roof for drains and leaders. It goes on and on, it's five hours long.
Don't even tell me how hard the Ca. test is, I know better. I plumbed out there for 16 years and found out I didn't know sh*t when I took a real test. I have my Master license now but you don't get it by getting a little help on the internet. It takes months if not years to learn this stuff to prepare for the test.
When you get a Master Plumbing license you've earned it and earned the right to be called a Master Plumber! ooooooohRAH!!!!!!!!