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

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

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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
the command set being common across different hardware configurations
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
None of these

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Operating System (OS)
Trojan-Horse programs

do not usually work
None of these
are hidden programs that do not show up on the system
are legitimate programs that allow unauthorized access
usually are immediately discovered

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