Multiprogramming is the rapid switching of the CPU between multiple processes in memory. It is done only when the currently running process requests I/O, or terminates. It was commonly used to keep the CPU busy while one or more processes are doing I/O. It is now mostly
superceded by multitasking, in which processes also lose the CPU when their time quantum expires.
Multiprogramming makes efficient use of the CPU by overlapping the demands for the CPU and its I/O devices from various users. It attempts to increase CPU utilization by always having something for the CPU to execute.
The prime reason for multiprogramming is to give the CPU something to do while waiting for I/O to complete. If there is no DMA, the CPU is fully occupied doing I/O, so there is nothing to be gained (at least in terms of CPU utilization) by multiprogramming.
It improves the CPU efficiency by increasing the CPU utilization. It keeps more than one program in the memory and when
a program needs to do I/O, it starts executing another program. Thus no time is wasted and the CPU doesn't need to wait
for the I/O to get completed.
A multithreaded process is one that can fully utilize the processing power of a computer processor. The processor is many times faster than what is required to run a single threaded java application and hence it spends more than 90% of its time idling. Hence multithreaded applications create multiple threads of execution that can be run in parallel thereby better utilizing the processing power of the CPU.
Multithreaded processes are much faster and efficient in processing than single threaded system.
Multiprocessing helps you to several works at one time e.g you are listening songs working on ms word etc.
1. better performance-shorter response time & higher throughput
2. Better Reliability-if one processor brekdown then other takes its workload
Multiprocessing systems can do two processes at the same time. So if a task's resources are not free then the other task is being processed.
nstalling the computer requires a grueling and expensive task of system analysis and design. There is a scarcity of computer professionals to do this.2 The initial investment can
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Where it has to do with symmetrical shapes and there equations.
The main advantage of ac- it required less maintainance The main disadvantage of ac-it can not be stored the main advantage of dc -it required less amount of conductors to transmit and easily stored The main disadvantage of dc-it is more dangerous than ac at high voltage
A hard real-time system guarantees that critical tasks complete on time. This goal requires that all delays in the system be bounded from the retrieval of the stored data to the time that it takes the operating system to finish any request made of it. A soft real time system where a critical real-time task gets priority over other tasks and retains that priority until it completes. As in hard real time systems kernel delays need to be bounded
uniform deposition will be occur
Operating System level.
Multiprogramming increases CPU utilization by organizing jobs so that the CPU always has a job to execute.
multiprogramming
Advantages of multiprogramming operating system:i) It increases CPU utilization.ii) It decreases total read time needed to execute a job.iii) It maximizes the total job throughput of a computer.Disadvantages of multiprogramming operating system:i) It is fairly sophisticated and more complexii) A multiprogramming operating system must keep track of all kinds of jobs it is concurrently running.
Answer:Multiprogramming makes ef?cient use of the CPU by overlapping thedemands for the CPU and its I/O devices from various users. Itattempts to increase CPU utilization by always having something for the CPU to execute
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
multiprogramming
using multiprogramming we can save the time multiprogramming resources to more than one current application i.e we can run multiple applications at a time that's way we refuses the time
THE multiprogramming system was created in 1968.
timesharing is logical extention of multiprogramming.
It supports multiprogramming since multiple processes can be stored inside the main memory.
is it possible to do multiprogramming with only one partition
The main advantage of T- streak method: 1. To get a very good isolated colonies.2. To obtain pure culture from mixed culture.