Compare Multiprogramming Vs Multitasking, The ability of the operating system to store one or more task in the main memory simultaneously is known as multiprogramming. On the other hand, when you have one or more task in a same CPU at a given point of time, it is known as multitasking.
In simple language, multiprogramming means running many programs on a computer. Moreover, in here you will find that the operating system is the one which is deciding everything because as a user you won’t be able to interact with your system.
Now, if you look at Multitasking, then you will witness that it’s the logical extension of the very own multiprogramming. But, in here the users can interact with the system and hopping from one task to another is quite fast and is smoothly done too. In multitasking you can perform various tasks on your computer.
A single CPU is responsible for executing two or more than two jobs, which are interleaved or concurrent in multitasking. But, in multiprogramming, the jobs that are loaded in the pool are the ones which need to be executed. Selected few are there in the main memory and you will see that the CPU is selecting one from there for the execution. The next job comes into action only when the previous job, which was in progress, is terminated and this is the time when CPU’s control is handed over to the next job in line.
In multiprogramming, you will not find CPU lying idle because it keeps on executing some kind of job always, instead of waiting for tape driver or a printer or maybe a console input. So, in multitasking, the tasks share the common resource called the CPU and in multiprogramming a computer is said to run one or more programs at the same time. You can say that running Word and Firefox at the same time is a perfect example of Multiprogramming. Now, multitasking can be termed to jobs like playing games, listening to songs, working in MS Words and some other applications at the same time.
Multitasking and Multiprogramming
Common scheduling of algorithms that are put to use by multitasking are Shortest Process Next, Priority scheduling, round robin, etc. On the other hand, multiprogramming uses the algorithms like Shortest remaining time next, first come first served and shortest job first. In multiprogramming, you might find one program running while several other process residing in the main memory.
But, the main thing is that, multiprogramming is an old term to use because nowadays you won’t find the complete program loaded completely in the system’s main memory. If you think about the concept of multiprogramming and multitasking, then you will see that they almost relate to the same thing, but with a small difference.
The multiprogramming is prevalent in older systems, whereas multitasking is more of a modern concept and is found in the modern OS only. The multitasking OS’s task cannot be termed as full application program because the operating system and mainly the modern ones are separated in logical pages.
Though the tasks are all lined up, but the system is executing only one task at a time, whereas the other tasks that are in the line is waiting for their turn to arrive. In multiprogramming, the main objective is to optimize the utilization of CPU and that is achieved by reducing the idle time of CPU. All these multiprogramming and multitasking refers to the software implementation of the relevant scheduling processes for the system’s CPU execution. You will find that here are no major differences between the two; instead there are subtle differences that differentiate the two.