Multitasking

• A process of executing multiple tasks simultaneously is known as Multitasking.
• It is of two types:- 

1. Process-Based Multitasking 
2. Thread-Based Multitasking

Process-Based Multitasking:-

• The process is a heavyweight.
• The high communication costs involved in the process.
• Each process allocates a separate memory area i.e. each process has an address in memory.

Thread-Based Multitasking:-

• Thread is a small unit of processing that operates as a lightweight sub-process..
• The cost of communication between the Thread is low.
• It uses a shared memory area, they don't allocate separate memory areas so Threads saves memory.
• Thread is independent. If any exception occurs in one Thread it doesn't affect another thread.