Differentiate between Multi-Programming and Multi-Threading
Q1. Differentiate between Multi-Programming and Multi-Threading.
Ans.
| Multi Programming | Multi Threading |
| 1. Multiprogramming is a rudimentary form of parallel processing in which several programs are run at the same time on one processor. | 1. Multi-threading is the ability of a program or an operating system process to manage its use by more than one user at a time. |
| 2. Since there is only one processor, there can be no true simultaneous execution of different programs. | 2. Even manage multiple requests by the same user without having to have multiple copies of the program running in the computer. |
| 3. Instead the operating system executes part of one program, then part of another, and so on. | 3. In some situation a single application may be required to perform several similar tasks. |
| 4. To the user it appears that all programs are executing at the same time. | 4. Example as web server accepts client requests for web pages, images, sound and so forth. A busy web server may have several of clients. Concurrently accessing it, if the web server runs as a traditional single-threaded process, it would be able to service only one client at a time. The amount of time that a client might have to wait for its request to be serviced could be enormous. |
| 5. The operating system selects a job from the job pool and starts executing a job, when that job needs to wait for any input/output operations the CPU are switched to another job. So the main idea here is that the CPU is never idle. | 5. Resources sharing economy and utilization of multiprocessor architectures multi-threading concept can be used. |