one,
1. What is a process? What is a thread? What is the difference between process and thread?
Open the Windows operating system "Task Manager", you can see many background processes.
A process is the unit in which a program runs in an operating system.
A process is an independent unit of allocation and scheduling of operating system resources, while a thread is the basic unit of CPU scheduling
An application has at least one process, and a process has at least one thread.
Reference blog:
https://blog.csdn.net/zhou753099943/article/details/51771220