Operating System (OS)
The category of operating system that you most likely have running on your PDA computer is a ....... Operating system

Single user, single task
Single user, multitask
Multiuser, multitask
Real time

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

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

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Operating System (OS)
Memory management is :

not used on multiprogramming systems
critical for even the simplest operating systems
replaced with virtual memory on current systems
None of these
not used in modern operating system

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