Operating System (OS)
The primary purpose of an operating system is to:

allow people to sue the computers
make the most efficient use of the hardware
None of these
make computer easier to use
keep system programmers employed

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Operating System (OS)
File record length

should be chosen to match the data characteristics
Should always be variable
None of these
depends upon the size of the file
should always be fixed

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Operating System (OS)
The advantage(s) of incorporating the macro processor into pass 1 is(are):

None of these
more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros.
many functions do not have to be implemented twice.
All of these
Functions are combined and it is not necessary to create intermediate files as output from the macros processor and input to the assembler.

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Operating System (OS)
What is the method of handling deadlocks?

Use a protocol to ensure that the system will never enter a deadlock state
All of these
Allow the system to enter the deadlock state and then recover
Pretend that deadlocks never occur in the system

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Operating System (OS)
The instruction register

is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
is a hardware memory device which denotes the location of the current instruction being executed.
None of these
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".

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