Operating System (OS)
Under virtual storage,

interprogram interference may occur
two or more programs are stored concurrently in primary storage
a single program is processed by two or more CPUs
only the active pages of a program are stored in primary storage
None of these

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

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

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Operating System (OS)
The dispatcher

actually schedules the tasks into the processor
None of these
never changes task priorities
puts tasks in I/O wait
is always small and simple

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Operating System (OS)
The Memory Buffer Register (MBR)

contains the address of the memory location that is to be read from or stored into.
contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
None of these
is a hardware memory device which denotes the location of the current instruction being executed.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.

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