if it is to old too get job

I am 50 years old mother, I 常常想 if I am to old too get job because it is often that the manager who interview me is younger than me. they ask the questions that are very detail, looks you should remember the whole Java library, each function name, for now, there are very good Editor, such as Eclipse,you don't need remember the whole Library name, they will show you the function name when you coding.

my son will graduate from university next year, I have only one child.