Operating System (OS)
Which of the following is not a characteristic of a daisy chaining priority control scheme?

the failure of one device may affect other devices on the chain
priority is programmable
it is relatively easy to add more devices to the chain
None of these
the number of control lines is independent of the number of devices on the chain

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Operating System (OS)
The necessary conditions needed before deadlock can occur?

Mutual Exclusion, Hold and wait, No Preemption, Circular Wait
Mutual Exclusion, No Hold and wait, Preemption, Circular Wait
Mutual Exclusion, Hold and wait, Preemption, No Circular Wait
No Mutual Exclusion, Hold and wait, Preemption, Circular Wait

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

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