When should you use multithreading? And would multi threading be beneficial if the different threads execute mutually independent tasks?

Question

This were the only two questions I couldn\'t answer in the interview I got rejected from last night.

Answer 1

You should definitely use multithreading in GUI applications when you invoke time consuming tasks from the main event loop. Same applies for server application that might block while doing the I/O.

For the second question, it is usually yes when you have machine with multiple CPU cores. In this case these independent tasks can be executed in parallel.