What is process synchronization ?

Question

So many times, we make foreground process to background process in linux system. How does it handle internally ?

Answer 1

When two or more processes try to access and modify the same data, some inconsistency may occur in the system due to this race condition. To avoid this race condition and get the correct value of data, process synchronization is necessary.

Answer 2

Process synchronization is required when one process must wait for another to complete some operation before proceeding. For example, one process (called a writer) may be writing data to a certain main memory area, while another process (a reader) may be reading data from that area and sending it to the printer. The reader and writer must be synchronized so that the writer does not overwrite.