Operating System (OS)
Part of a program where the shared memory is accessed and which should be executed invisibly is called

critical section
directory
None of these
mutual exclusion
semaphores

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Operating System (OS)
Addressing structure

are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
defines the fundamental method of determining effective operand addresses
All of these
None of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.

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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
Allow the system to enter the deadlock state and then recover
All of these
Pretend that deadlocks never occur in the system

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