I have both BSCS and MSCS, with 24 years in industry, and I have heard the use of these terms vary depending upon who is using them, but this is my view based on my experience.
Multiprogramming is an old and arcane term, that was originally used to describe the earlier timesharing type of system where multiple jobs/Programs could be submitted to a computer system, and it should share its various resources between all of the jobs that were running. The jobs/programs were not decomposed beyond the job level, and this was the granularity of the CPU and resource sharing that occurred. It is true to say that multiprogramming is still supported today on modern computers because it is true that multiple jobs/programs are running at once. However, this is true of all computers now, and is not even a relevant consideration. What is relevant though is the level of sharing that has changed dramatically over the years.
Now, the terms multitasking, multiprocessing and multithreading, mean the exact same thing in the general sense, and none has any dependency on the number of CPUs in a system. The first thing to understand here is that the words are basically synonymous in the general sense in that, a task is a process is a job is a thread is a program. Its all based on your POV. Where these terms start to take on specific meaning is when viewed in the context of a specific execution environment where a program is designed, compiled, loaded and executed on a specific piece of computer hardware. This context might assign a hierarchical meaning such as a program is the highest level of organization that decomposes into multiple tasks that run separately, that each can be decomposed into one or more processes, that can be further decomposed into some number of threads. Just an example.
You can take that same decomposition and apply it in the compiler used to build software for a true multiprocessor system, and it will look for these, and also other patterns of execution that allow load balancing between the processors. Such tools will also usually allow for high level partitioning, but will also usually have automatic load balancing mechanisms in place that try to maximize CPU utilization. In the end, the multiprocessor system is executing the software in the same way on each processor, but can get real parallelism not found in a single processor system.
The use of such terms is also influenced by how a program is designed because it can be designed to execute as single monolithic beast with a single execution path through it, or it can be specifically designed as a set of independent units that all get started by the program, and do all the work. Such units are called tasks, processes, functions, and even threads. One can enter into debates that a thread is really a light weight process, as opposed to a heavy weight process, but then one starts to get into the boring minutia of how processes are represented by the OS,etc, and this is always context specific, and not worth the time.
All computers and operating systems in use today support very fine grained sharing of the CPU between multiple jobs, tasks, threads, processes, and some even analyze the code instructions at runtime to determine which blocks of instructions can be run out of order.in simple words multitasking/ multiprogramming conveys single processor and multiprocessing connotes to 2 processors being used to accomplish a task/job.
A minor difference between multitasking and multiprogramming can be understood by help of threads in JAVA where each (more than 1 program) program being run attributes to multiprogramming and each thread within a program connotes to multitasking as they share time with and r run concurrently......For all the terminologies Multiprogramming is the core. Multiprogramming is the process of loading more than one program into the memory so that processor can be kept busy by switching between any of the loaded programs. Multitasking is derivation of multiprogramming where the operating system treats the programs loaded in the memory as task. But multiprocessing mainly deals with the hardware. Here more than one processing unit (CPU) comes into the picture. Multiprocessing leads to parallel computing.
The difference of these three words/computer jargon is that: 1. Multitasking is the ability of a computer to handle a number of tasks or jobs simultaniously, while multiprogramming is the capacity to run or handle several programs at the same time. Lastly but not the least, multiprocessing is the ability or capacity of a computer to handle or rather solve a particular task in various ways. Hope you will make some sense out of this.
Mutitasking and mutiprogramming are basically one and the same thing, in which the computer handles many tasks or programs simultniously. but multiprocessing is the techniuqe of handling one or more jobs in different ways, like in mutiprocessor architecture.
Multi programing means executing more than one program ,but here when ever the processor is idle during execution of one process it go for execution of another program.Where as in Multitasking,this is a combination of both multi programing and time sharing.means in this it will execute more than one process simultaneously.
The term Multitasking is used when more than one applications/programs/tasks are being run on a single processor. On the other hand, Multi-Processing is the ability to use more than one processor (CPU), on a single machine.
the main difference b/w multiprogramming and multiprocessing O.S. is that the previous one is non-interactive O.S. and the later is interactive O.S. By-Satyam Maheshwari
Multitasking is being able to do more than one thing at a time. Multiprogramming is using more than one 'language' to accomplish a task.
Multiprocessing / multitasking Multiprocessing is the use of two or more processors in a single computer. to acheive greater throughput, economy of scale and increased reliability.Most multiprocessing systems use symmetric multiprocessing, SMP, (as opposed to asymmetric) where all processes share the processing load equally. Multitasking on the other hand is best explained by first defining what multiprogramming is. Multiprogramming is used to ensure the best effecient use of the CPU. Whenever a CPU is processing a program, which is loaded in memory, and it must wait for resources or I/O then it will sit idly which is a waste of the CPU. Multiprogramming will store a number of 'jobs' in a queue and whenever the CPU is waiting for I/O etc while executing a particular job, it will immediately open the next job in the queue and process that job until such time as it must wait again, and then it can select the next job in the queue or return to the previous job. In this way the CPU idle time is reduced. Multitasking is a logical extension of multiprogramming in that instead of waiting for a process to reach a stage where it must wait for I/O or some resource, it schedules time for each process that is loaded into memory, such that each process appears to the user to be running at exactly the same time.Another name for multitasking is timesharing.
First of all there is difference between program and a task. There may be multiple tasks running related to one program at the same time. so if the processor is busy in multiple tasks related to one program then it is multitasking. But if the multiple tasks which the processor is executing concurrently are related to different independent programs then the concept is know as multiprogramming.
Multiprocessing means the computer can do multiple processes parallel of each other (at the same time) with no performance degradation. Multiprogramming is an application that can be used to interface with different programming languages (java, C++, etc)
What is the difference between parallel processing and multiprocessing?
no of tasks can be done at a time is called multi tasking no of programmes can be executed in a single system is called multi programming
Multitasking: The ability to execute more than one task at the same time is called multitasking. It involves only one CPU. Multiprogramming: The ability to execute more than one task but not simultaneously is called multiprogramming.
multiprocessing is what men do, and multi tasking is what men cant do
Cooperative multitasking is multitasking tohelp someone else, while peemative multitasking is multiaatsking for yourself.
multiprogramming or multitasking means more than one program can execute at the same time. It is the allocation of a computer system and its resources to more than one application at the same time. However in uni-programming you can have only one program running at any point in time.
the "-ing" part...
* Multiuser: A computer system the can handle more then one user at a time. Windows is not a multiuser OS. It can handle only one user at a time. * Multitasking: The ability of an OS to do more then one thing at atime. for instance, you can be downloading a large file and still use another program to do something, like write a book. * Multiprocessing: The chip in new computers is able to do more then one task at a time because there is more then one processing unit on/in the chip.
acc. to me,multiprogramming is based on system level and multitasking is based on user level.operating system can execute a program or application once at a time.it means the code related to other applications would be stored in operating systems but it will activate when that particular application is activated by user. acc. to me,multiprogramming is based on system level and multitasking is based on user level.operating system can execute a program or application once at a time.it means the code related to other applications would be stored in operating systems but it will activate when that particular application is activated by user. acc. to me,multiprogramming is based on system level and multitasking is based on user level.operating system can execute a program or application once at a time.it means the code related to other applications would be stored in operating systems but it will activate when that particular application is activated by user.
Multi-tasking means doing more than one task at a time; such as printing, burning c.d's, etc. all at the same time. Multi-programming means running more than one program at one time; such as Microsoft word, AOL, Windows Media Player, all at one time. Multi-processing means that your computer can process more than one thing at a time.
ALU stands for arithmetic and logic unit. The ALU does complex calculations, so by having two it gets the job done faster. This may not really make a difference if your an average user, although if you do AutoCAD and stuff that requires rendering then it will make a HUGE difference.
Multitasking is a method for multiple tasks to share a single resource, like a CPU. This is usually accomplished in software via special programming.Multiprocessing is the use of multiple CPUs in the same computer and the method of splitting tasks between them. This is usually done with hardware on the motherboard.
multitasking is doing more than two task or more. And combing task is two task
In Multiprogramming it is possible to run several programs at same time rather than one at a time in uniprogramming.. and higher resource utilization.
Multiprogramming is collecting several jobs in a job pool and the OS selects the job from the pool so that the CPU has one job to execute , in case of any IO request for the job in execution the CPU switches to another job here switching is less compared to multitasking.So a computer system which allows such type of switching in between jobs is called a multiprogramming system. Please make note that multitasking is done by user but multiprogramming is done by operating system only.
Multiprocessing is a generic term for the use of two or more central processing units (CPUs) within a single computer system. There are many variations on this basic theme, and the definition of multiprocessing can vary with context, mostly as a function of how CPUs are defined. The term multiprocessing is sometimes used to refer to the execution of multiple concurrent software processes in a system as opposed to a single process at any one instant. However, the term multiprogramming is more appropriate to describe this concept, which is implemented mostly in software, whereas multiprocessing is more appropriate to describe the use of multiple hardware CPUs. A system can be both multiprocessing and multiprogramming, only one of the two, or neither of the two. Time-sharing refers to sharing a computing resource among many users by multitasking. Because early mainframes and minicomputers were extremely expensive, it was rarely possible to allow a single user exclusive access to the machine for interactive use. But because computers in interactive use often spend much of their time idly waiting for user input, it was suggested that multiple users could share a machine by using one user's idle time to service other users. Similarly, small slices of time spent waiting for disk, tape, or network input could be granted to other users. Computers capable of providing time-sharing services would often operate in batch mode overnight.
When a person is task switching, they are working on one thing at a time. If a person is multitasking, they are working on more than one thing at once.
Multitasking is when one computer processor is doing more than one thing at once; it is like you trying to eat a snack while reading a book. Multiprocessing is when more than one computer processor is working on the same problem. It is like when you and your friends work together on homework.
a multiprocessor is a small chip insisde a computer system and a multiprocessing system is a computer that is able to have multiple people running processes on a computer at the same time without affecting other users.
multiprogramming or multitasking means more than one program can execute at the same time. It is the allocation of a computer system and its resources to more than one application at the same time. However in uni-programming you can have only one program running at any point in time