Does the number of processes correspond to the number of threads in the system?

The number of processes and the number of threads in the system do not match and are not equal to each other.

A process is an instance of a running program that contains its own address space, resources, and one or more threads.

A thread is a unit of execution within a process. One process can contain multiple threads, which share the process's resources.

Thus, the number of threads is usually greater than or equal to the number of processes, as each process has at least one thread but can have several.

For example, in iOS, an application is a process that can have multiple threads working concurrently to perform different tasks.