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Assignment No. 03 Semester: Fall 2014 CS604 –Operating System Total Marks: 15 Due Date: 16/2/2015

Uploading instructions:

 

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  • 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 1:   (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

1

1

2

3

4

2

2

1

2

3

4

P1

1

0

2

2

1

3

4

14

 

 

 

 

P2

1

4

5

6

2

7

5

8

 

 

 

 

P3

2

5

4

2

3

5

7

9

 

 

 

 

P4

1

5

2

7

1

6

3

9

 

 

 

 

 

Need

A

B

C

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Answer the following questions using the banker’s algorithm:

 

(a)   What is the content of the matrix Need?                                             5

 

 

(b)   Is the system in a safe state? If yes identify the safe sequence. Show the step by step execution by updating the data structure if necessary.                                                            10

 

 

NOTE:Do not put any query on MDB about this assignment, if you have any query then emailatcs604@vu.edu.pk.

 

Deadline: Your assignment must be uploaded/submitted on or before

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Replies to This Discussion

hun!

yeh bhe agai 

Safe Sequence:<P4, P2, P3, P0>

This is safe sequence

Safe sequence is not unique. Many other sequences are feasible. But your one is also Ok.

Han g

Han g

ab to khatm hone wali :P 

Please Discuss here about this assignment.Thanks
Our main purpose here discussion not just Solution
We are here with you hands in hands to facilitate your learning and do not appreciate the idea of copying or replicating solutions.

Start Discssion

Safe Sequence is

P4>>P0>>P2>>P3>>P1

AnyBody not agree at this???????????????

plz discuss this assignment

@ Efficient48

Safe sequence is not unique. Many other sequences are feasible. But your one is also Ok.

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