#Universally testable answers#

An answer will be considered to be universally testable if:

1. It is written in a programming language which has a compiler/interpreter available on Windows, Linux & Mac where said compiler/interpreter can be downloaded from the web free of charge (not including free trials) and does not require sign up/registration.
2. or it is written in a programming language that has an online compiler/interpreter such as http://ideone.com/, which is available free of charge and does not require sign up/registration, where the answer may be fully tested within the online compiler/interpreter i.e. doesn't need access to local resources.

Additionally, if the behaviour of the answer is different on different platforms/architectures, it should still meet the question criteria on all platforms/architectures.

Universally testable answers

An answer will be considered to be universally testable if:

1. It is written in a programming language which has a compiler/interpreter available on Windows, Linux & Mac where said compiler/interpreter can be downloaded from the web free of charge (not including free trials) and does not require sign up/registration.
2. or it is written in a programming language that has an online compiler/interpreter such as http://ideone.com/, which is available free of charge and does not require sign up/registration, where the answer may be fully tested within the online compiler/interpreter i.e. doesn't need access to local resources.

Additionally, if the behaviour of the answer is different on different platforms/architectures, it should still meet the question criteria on all platforms/architectures.