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

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

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Operating System (OS)
Swapping

works best with many small partitions
allows many programs to use memory simultaneously
None of these
allows each program in turn to use the memory
does not work with overlaying

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Operating System (OS)
The function(s) of the Syntax phase is(are)

to build a literal table and an identifier table
to build a uniform symbol table
None of these
to parse the source program into the basic elements or tokens of the language.
to recognize the major constructs of the language and to call the appropriate action routines that will generate the intermediate form or matrix for these constructs.

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