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Assignment No. 04
Semester: Spring 2015
CS604 –Operating System Total Marks: 10

Due Date:08/08/2015
Uploading instructions:

Your assignment must be in .doc format (Any other formats like scan images, PDF, Zip, rar, bmp, etc will not be accepted).
Save your assignment with your ID (e.g. bc020200786.doc).
No assignment will be accepted through email.

Rules for Marking:

It should be clear that your assignment will not get any credit if:
The assignment is submitted after due date.
The submitted assignment does not open or file is corrupted.
Your assignment is copied from internet, handouts or from any other student
(Strict disciplinary action will be taken in this case).

Assignment

Question: (5 marks).

Consider the following table to compare the paging with segmentation. Fill your answer with yes and no.


Consideration Paging Segmentation
Can the total address space exceed the size of physical memory

Need the programmer be aware that this technique is being used?

Is sharing of procedures between users facilitated?
Can tables whose size fluctuates be accommodated easily?
Can procedures and data be distinguished and separately protected?

Question: (5 marks).
Consider the following snapshot of a system:


Allocation Max Available
A B C D A B C D A B C D
P0 1 0 1 1 2 4 5 2 1 5 2 0
P1 1 0 0 1 1 3 5 7
P2 1 3 5 2 3 6 5 5
P3 0 4 2 2 1 4 4 2
P4 0 2 1 4 0 3 1 6

Need
A B C D


Answer the following questions using the banker’s algorithm:
What is the content of the matrix Need?

NOTE: Do not put any query on MDB about this assignment, if you have any query then email at cs604@vu.edu.pk.

Deadline: Your assignment must be uploaded/submitted on or before 08July 2015.

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