Operating System (OS)
A partitioned data set is most used for

storing program data
storing backup information
a program or source library
None of these
storing ISAM files

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Operating System (OS)
A Processor

is the device where information is stored
is a sequence of instructions
is typically characterized by interactive processing and time of the CPU
is a device that performs a sequence of operations specified by instructions in memory.
None of these

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Operating System (OS)
The advantage of a command processor running only built-in commands is:

the processing is much faster than would other-wise be the case when user defined commands are used
None of these
users can create system programs and run them as commands
flexibility to the users in running lists of commands by simply collecting them in named batch command files
the command set being common across different hardware configurations

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