Operating System (OS)
A form of code that uses more than one process and processor, possibly of different type, and that may on occasions have more than one process or processor active at the same time, is known as

None of these
time sharing
broadcasting
multiprogramming
multithreading

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Operating System (OS)
Memory management is :

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

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Operating System (OS)
The LRU algorithm

pages out pages that have not been used recently
pages out pages that have been least used recently
None of these
pages out the first page in a given area
pages out pages that have been used recently

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