Operating System (OS)
The advantage(s) of incorporating the macro processor into pass 1 is(are):

many functions do not have to be implemented twice.
more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros.
All of these
Functions are combined and it is not necessary to create intermediate files as output from the macros processor and input to the assembler.
None of these

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Operating System (OS)
All of the following are task performed by the operating system except

Provides an interface for user to interact with computer
Performing housekeeping task like file compression and disk defragmentation
Managing hardware on the computer
Controlling the access that application program has to the CPU

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