Consider the CLOCK page replacement policy. Assume that there are only 3 page slots available in the buffer pool. If a page reference sequence is: 0, 4, 1, 4, 2, 4, 3, 4 (in order from left to right). What happens when the second 4 (i.e., the 4 underlined with blue color) is referenced? Group of answer choices Its reference bit is set to 1. Its reference bit is set to 0. It is evicted. Nothing changes.

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter3: Data Representation
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CSC 472 Introduction to Database Systems Project

Consider the CLOCK page replacement policy.

Assume that there are only 3 page slots available in the buffer pool.

If a page reference sequence is: 0, 4, 1, 4, 2, 4, 3, 4 (in order from left to right).

What happens when the second 4 (i.e., the 4 underlined with blue color) is referenced?

Group of answer choices
Its reference bit is set to 1.
Its reference bit is set to 0.
It is evicted.
Nothing changes.
 
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