Vidya S.

Multiprocessing: Consider running a Word application, a browser, a music player, and a gaming app. Each one of the above is a distinct process, with a specific job to perform. They share the processor time and the database resources, but the interaction between them may be limited or nil. Multithreading: Now consider running a browser with multiple tabs or a Spreadsheet with multiple sheets. Though the tabs/sheets are unique, they are subset of a larger process ( a browser or spreadsheet.) Threads are sub-processes. They are light weight. Threads share the resources within a process. They share the same data structure and variables. So inter thread communication ( like using data from one sheet to do computing in another sheet in a spreadsheet application) becomes a painless job. In multiprocessing, different processes execute in tandem, sharing the CPU and storage resources. In multithreading, different threads (subprocesses) execute in tandem within a process to achieve the goal of that process.