ISRO2016-49

Question

Working Set $(t,k)$ at an instant of time $t$ is

• A. the set of $k$ future references that the OS will make
• B. the set of future references that the OS will make in next $t$ unit of time
• C. the set of $k$ references with high frequency
• D. the $k$ set of pages that have been referenced in the last $t$ time units

Comments

D ?

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Good read:

https://web.stanford.edu/~ouster/cgi-bin/cs140-winter12/lecture.php?topic=thrashing

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Also check: https://gateoverflow.in/45557/isro-2013-65

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The set of pages that a process is currently using is called its working set

Answer 1

Ans- D. k set of pages that have been referenced in the last t time units.

Reference- http://www.informit.com/articles/article.aspx?p=25260&seqNum=9

Comments

Reference http://www.cs.utexas.edu/users/witchel/372/lectures/16.PageReplacementAlgos.pdf

Answer 2

Working set(t,k) = Set of Unique pages referenced during the past Delta references(Delta is gues which is int) within t unit of time.

Hence ,option (D) the k set of pages that have been referenced in the last tt time units ,should be correct