These are two modes of operation of a computer system.
BATCH Processing continues from beginning to end without user intervention, the process is delayed until all data has been entered.
A batch process may be controlled be Job Control Language (JCL), the JCL contains a batch header, the following items may be contained in the batch header: JobID, Priority, Job completion time, main memory required, name of file to be executed, devices/hardware required.
INTERACTIVE User and computer in two way communication, processing is carried out as the user enters the data.
Interactive process are given higher priority than Batch processing, this is because the user requires an immediate response.
Other features that may effect the priority of a process are: proximity of the end of a job, proximity of the deadline for a batch process, time waiting in inactive list, resources required,estimated running time.
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