Multiprogramming: When multiple programs execute at a time on a single device, it is multiprogramming.
Multitasking: When a single resource is used to process multiple tasks then it is multitasking.
Multithreading: It is an extended form of multitasking.
Multiprocessing: When more than one processing unit is used by a single computer then it is called multiprocessing.
Difference between Multiprogramming, Multithreading, Multitasking and Multiprocessing
|
S.No. |
Multiprogramming |
Multitasking |
Multithreading |
Multiprocessing |
|
1. |
In multiprogramming, multiple programs execute at a same time on a single device. |
In Multitasking, a single resource is used to process multiple tasks. |
Multithreading is an extended form of multitasking. |
In multiprocessing, multiple processing units are used by a single device. |
|
2. |
The process resides in the main memory. |
The process resides in the same CPU. |
More than one thread processed on a single CPU. |
The process switches from one to another CPU as multiple processing units are used. |
|
3. |
It uses batch OS. The CPU is utilized completely while execution. |
It is time sharing as the task assigned switches regularly. |
The tasks are always further divided into sub tasks. |
It carries multiple processors to execute the task. |
|
4. |
The processing is slower, as a single job resides in the main memory while execution. |
Multitasking follows the concept of context switching. |
It allows a single process to get multiple code segments. |
A large amount of work can be done in a short period of time. |
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