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 can use multithreading if the tasks can be broken down which can be executed in parallel. Like produce and consume , Validate and save , Read and Validate.

For the second question , Yes, it is beneficial for make a program into Multi threading if they are executing independent tasks.