Difference between Multiprogramming and
Multitasking
Multiprogramming
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Multitasking
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In Multiprogramming, at the same
time, we can run the multiple processes concurrently on one processor.
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In Multitasking, at the same time,
we can execute multiple tasks by the use of multiple CPUs.
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Multiprogramming is implemented
by using the concept of context switching
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Multitasking is implemented by
using the concept of time-sharing.
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In Multiprogramming, to execute the
processes, only one CPU is used.
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In Multitasking, to allot a task
we need Multiple CPU’s.
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Multiprogramming requires more
time to execute processes.
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Multitasking requires less time
to execute processes.
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The reason to use multiprogramming
is we can reduce the CPU ideal time.
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The reason to use multitasking is
we can easily run multiple processes concurrently through time-sharing.
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Multiprocessing is more
expensive.
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Multitasking is less expensive.
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Difference between Time-Sharing and Real-Time Operating System
Time-Sharing Operating System
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Real-Time
Operating System
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In
a time-sharing operating system, for a request, a fast response is
emphasized.
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In
a real-time operating system, the task of computation is emphasized before
its nominative point.
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Time-sharing
operating systems provide the switching method/function.
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The real-time operating system does not give
the switching method/function.
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In
a time-sharing operating system, there is a possibility of changes in the
program.
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In
a Real-time operating system, there is no possibility of changes in the
program.
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In
time-sharing, resources are shared externally.
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In
a Real-time operating system, resources are not shared externally.
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The time-sharing system can deal with more
processes and applications concurrently.
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The
real-time operating system can only deal with one process and application at
a time.
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In
this operating system, it is must that the user response is given within a
second.
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In
this operating system, the response is given to the user within the time
constraint.
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Difference between Multicore System and Multiprocessor System
Multicore System
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Multiprocessor System
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In
Multicore, a single program executes faster.
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In
Multiprocessor, multiple programs can execute faster.
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Multicore
is not reliable.
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Multiprocessor
is reliable because if one CPU fails, then other CPU will not be affected.
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In
Multicore, traffic is less.
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In
Multiprocessor, traffic is more.
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In
this type of system, there is only one CPU, and the multiple cores are
resides in that CPU.
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In
this type of system, there are multiple CPUs.
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