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

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

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Operating System (OS)
What hole will allocates in "Worst-Fit" algorithm of memory management?

It allocates the exact same size memory hole
It allocates the smallest hole from the available memory holes
It allocates the largest hole from the available memory holes
It allocates the smaller hole than required memory hole

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Operating System (OS)
Addressing structure

All of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
None of these
defines the fundamental method of determining effective operand addresses

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