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fragments of memory words unused in a page

fragments of memory words used in a page

dividing the main memory into equal-sized fragments

dividing the secondary memory into equal sized fragments

Correct! Wrong!

the portion of the main memory which can be accessed only by one process at a time

a part of the operating system which is not allowed to be accessed by any process

a set of instructions that access common shared resource which exclude one another in time

none of the above

Correct! Wrong!