Operating System (OS)
What are the two types of Semaphore?

Counting Semaphores and Binary Semaphores
Critical Semaphores and System Semaphores
Analog Semaphores and Octal Semaphores
Digital Semaphores and Binary Semaphores

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Operating System (OS)
Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

they are memory resident
they are available on magnetic tapes
they are partly in primary memory and partly on disk
None of these
they are initially stored on disk

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

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