Answer 1

10.methods and "Immortal".methods if I undetstood your question correctly. You also probably can write conditional statement that checks whether particular method exists in a returned list of methods to avoid any mistakes.

Answer 2

Those kind of errors are a result of high complexity within the code and it must be dealt. There are programs that might help, such as checkmarx but it is important to make sure you try to deal with it while programming in order to avoid it.
Thank you.

Answer 3

okk

Answer 4

How to select a proper method for a particular object ?

Answer 5

This is cool,i love you guys