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What is the basic need in protecting memory in multi-user environment?

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in Operating System by (102k points)
What is the basic need in protecting memory in multi-user environment?

(a) We need two registers one ‘start’ and other ‘end’

(b) We need a variable register

(c) A fence register has to be used known as base register.

(d) None of the mentioned

I have been asked this question in an online quiz.

I need to ask this question from Protection in division Protection of Operating System

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The correct choice is (c) A fence register has to be used known as base register.

Easiest explanation - None.

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