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Sadly, if you know what a design pattern is and can name two then you are head and shoulders above 95% of developers.

Source: Been interviewing supposedly senior level candidates for the last three weeks.

The term "senior developer" is an unfortunate one because it can mean a really good, skilled and experienced developer. But it usually means 20 years of experience (1yr exp * 20) or they've just been around so long that the "senior" part refers to age.

and special bonus points if those two are not Factory and Singleton :-)

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