FNZ Developer interview questions

How to write unit testing How to write maintainable code How to do code reviews What should have in the code to write unit testing Hashing passwords Encryption and encoding difference Interface and abstract class difference SQL indexing SQL transaction scope Parametrize sniffing in SQL Cross site request forgery /what/how to fix Sql injection -what how to fix What is reflection Dependency injection Builder pattern/ singleton get and post method difference in format Difference in patch and put in rest api Difference between struct and class

Codility test with easy / lower intermediate questions, and an SQL task about joins and aggregate functions. I think they are pointless and don't show anything and is easy to cheat.