What is the difference between multitasking and multiprocessing in operating system

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Computer Organization. Discrete Mathematics. The illusion of parallelism is achieved when the CPU is reassigned to another task. So for multitasking to take place, firstly there should be multiprogramming i. And secondly the concept of time sharing.

Adapted from: "Difference between Multiprogramming, multitasking, multithreading and multiprocessing" by Darshan L. Multiprocessing In a uni-processor system, only one process executes at a time. Say processes P1, P2, P3 and P4 are waiting for execution. Now in a single processor system, firstly one process will execute, then the other, then the other and so on.

But with multiprocessing, each process can be assigned to a different processor for its execution. If its a dual-core processor 2 processors , two processes can be executed simultaneously and thus will be two times faster, similarly a quad core processor will be four times as fast as a single processor. It is based on a time slice concept which allocates a fixed interval of time to each task to be executed. It is very effective when a program needs a high degree of parallelism.

It provides a fixed interval of time for every program to execute. Multiprogramming and Multitasking are the two aspects of the Modern operating system. Multiprogramming is recording several processes in the memory and then executing it one after the other on a single processor. Multitasking is quite similar to multiprogramming but in this CPU is allocated to a process for fixed timing.

It executes more than one program or task at the same time utilizing multiple CPUs on the same computer. So, we can say that Multitasking can be considered as multiprogramming however, a Multiprogramming cannot be considered as multitasking. Skip to content The operating system is an important piece of program that manages the computer hardware and other software applications.

What is Multiprogramming? C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services. What is Multiprogramming? Advantages and disadvantages of multiprogramming There are various advantages and disadvantages of multiprogramming.

It has a shorter response time. It can assign priority to the jobs. Disadvantages Its scheduling implementation is not easy. It required more management. What is Multitasking?

Advantages and disadvantages of multitasking There are various advantages and disadvantages of multitasking. Some of them are as follows: Advantages It provides logical parallelism. It provides a shorter response time. It provides CPU utilization. Disadvantages It couldn't be executed on a slow-speed processor. It needs a large amount of storage memory to do the work. Main Differences between the multiprogramming and multitasking There are various main differences between multiprogramming and multitasking.

Some of them are as follows: Multiprogramming is mostly used to maximize CPU utilization by organizing applications always to have one program to execute. On the other hand, multitasking aims to enhance reaction time by sharing computing resources across several users.

Multiprogramming is primarily focused on increasing CPU use. The programs are organized so that the CPU will never idle; it will always execute one program after another. On the other hand, multitasking tries to improve CPU reaction time.