What is the sequence of execution of given methods in selenium testng?

Question

By default they execute as alphabetical order but what if the methods are like this
@test
Public void ab2{}
@test
Public void ab1{}

Answer 1

I don't know about selenium but in java the order of execution starts from the top level class which have main method, in that :
1st statics blocks are executed from top to bottom.
Then ananimous blocks are executed if any there..
Then main methods statements : for object creation the constructor executed first then instance blocks and calling methods..

In above code sample : both are instance methods so which ever is called first is get executed first.