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Please provide your answer to the question from todays workshop

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Will you be answering the question today

No

Yes

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A page-fault occurs. No free frames are available. All entries in the page table have the dirty-bit set. What happens next?

The page-fault causes a trap to kernel code. The kernel code invokes the page-replacement algorithm which chooses a page to evict from memory but, because all pages are flagged as dirty, no victim page can be chosen. In this (very rare) situation, the memory management system will fail, causing a "kernel panic" or "blue screen of death".

The page-fault causes a trap to kernel code. The kernel code invokes the page-replacement algorithm which chooses a page to evict from memory. Because the page is flagged as dirty, the data in the frame currently allocated to that page is copied out to backing store and the data for the requested page is then copied in to replace it. The page-table entry for the requested page is updated to point to the re-allocated frame, setting the valid bit and un-setting the dirty bit. The instruction that caused the page-fault is then restarted.

The page-fault causes a trap to kernel code. Because no free-frames are available, the process that caused the page-fault is terminated. All frames that were previously allocated in the page table are moved on to the free-frame list and the dirty-bits are all un-set.

The page-fault causes a trap to kernel code. The kernel code invokes the page-replacement algorithm which chooses a page to evict from memory. Because the page is flagged as dirty, the data in the frame currently allocated to that page is discarded and the data for the requested page is then copied in to replace it. The page-table entry for the requested page is updated to point to the re-allocated frame, setting the valid bit and un-setting the dirty bit. The instruction that caused the page-fault is then restarted.

The page-fault causes a trap to kernel code. Because the requested page is faulty, it is removed from the page-table, un-setting the dirty-bit and terminating the process that executed the offending instruction.

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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-

7 5 0

0 5 7

7 7 7

5 5 5

2 2 2

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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.

File Group

File Date

File Name

File Permissions

File Owner

File Size

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Which of the following is NOT an example of securitisation, as defined in the Lecture learning?

(select all correct answers only, selecting the wrong answer will result in a mark penalty)

A Mortgage-backed security

A bank deposit

A Company Share

A Home Loan

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T5 KCT 4 (Lecture)

Which of the following are benefits of increasing superannuation guarantee scheme to 12% in 2025?

(select all correct answers only, selecting an wrong answer will result in a mark penalty)

Increased reliance on the government pension

Reduced retirement savings

Reduced reliance on the government pension

Increased retirement savings

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Identify the correct permissions that are granted with the following commands

chmod 454

chmod 770

chmod 657

chmod 707

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