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IN1011 Operating Systems (PRD2 A 2024/25)

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A file that exists in a directory  has the permissions shown in the image, identify the permissions in a numeric way.

--w--w--w-

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A system with a First In First Out page replacement algorithm can store 3 pages in memory at any given time.

Assume that a series of pages arrive in the following order:

 (first)   7,0,1,2,3,4   (last)

The diagram below illustrates the process, three time points have already been completed:

Complete the remaining pages with the incoming pages. Answer which pages are stored in the locations denoted "a?" and "b?". Write down your answer as a two digit response, e.g. if the pages were 8 and 9, write down 89 without spaces, commas or other symbols

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In MAC (Mandatory Access Control), users are assigned to roles first, and then privileges are assigned to the roles. 

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Visit the Common Vulnerabilities and Exposures (CVE) website (https://www.cvedetails.com/top-50-products.php). Select the year 2004

, and observe which products had the highest number of vulnerabilities. Select the top five products (i.e. highest number of vulnerabilities). If you cannot find this year, select any year and then edit the date in

the URL e.g.,

https://www.cvedetails.com/top-50-products.php?year=2022.

(

Whilst

you are there, study other years. Is there a pattern on how things have

changed over the years? Are there any products that you expected to be

there but were not? Or the reverse?

)

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A file that exists in a directory  has the permissions shown in the image, identify the permissions in a numeric way.

- rwxr-x---

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A system with a First In First Out page replacement algorithm can store 3 pages in memory at any given time.

Assume that a series of pages arrive in the following order:

 (first)   7,0,1,4,3,7   (last)

The diagram below illustrates the process, three time points have already been completed:

Complete the remaining pages with the incoming pages. Answer which pages are stored in the locations denoted "a?" and "b?". Write down your answer as a two digit response, e.g. if the pages were 8 and 9, write down 89 without spaces, commas or other symbols

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The following commands were entered into a unix system:

Select the correct tree structure created with these commands.

0%
0%
0%
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Describe one case of

Revocation

of Access Rights

. Give details about the type revocation, is it immediate or delayed, is it selective or general, will it be partial or total, temporary or permanent.

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A system with a First In First Out page replacement algorithm can store 3 pages in memory at any given time.

Assume that a series of pages arrive in the following order:

 (first)   7,0,1,2,3,7   (last)

The diagram below illustrates the process, three time points have already been completed:

Complete the remaining pages with the incoming pages. Answer which pages are stored in the locations denoted "a?" and "b?". Write down your answer as a two digit response, e.g. if the pages were 8 and 9, write down 89 without spaces, commas or other symbols

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The following image contains a listing of a unix directory with one of the attributes enclosed in a red box. Select the correct attribute from the options below.

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