Operating System (OS)
Object modules generated by assemblers that contain unresolved external references are resolved for two or more object modules by a/an

None of these
compiler
operating system
linker
loader

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Operating System (OS)
Memory management is :

not used in modern operating system
not used on multiprogramming systems
None of these
replaced with virtual memory on current systems
critical for even the simplest operating systems

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Operating System (OS)
Fork is

the dispatching of a task
None of these
the creation of a new process
the creation of a new job
increasing the priority of a task

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