Operating System (OS)
Supervisor state is

never used
entered by programs when they enter the processor
None of these
only allowed to the operating system
required to perform any I/O

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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 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.
None of these
to parse the source program into the basic elements or tokens of the language.
to build a uniform symbol table

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