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.
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Difference between Multiprogramming, Multithreading, Multitasking and 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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