In multiprogrammed batch systems, the user cannot interact with the program during its execution. In time-sharing or multitasking systems, multiple jobs are executed by the CPU switching between them, but the switching occurs so frequently that the user may interact with each program while it is running. Time-sharing operating systems:
– uses CPU scheduling and multiprogramming,
– uses time-slice mechanism,
– allows interactive I/O,
– allows many users to share the computer simultaneously.
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