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Question No 1                                                                                                15 Marks

Consider the below given snapshot of the system. P1 to P5 represent the 5 processes currently running on the system. M, N, O and P represent the resources whereas M, N, O and P have 13, 11, 9 and 16 instances respectively.

Processes

Allocation

Max

M

N

O

P

M

N

O

P

P1

0

0

1

2

4

3

2

2

P2

3

1

2

1

5

2

4

2

P3

2

1

0

3

4

4

2

6

P4

1

3

1

2

3

3

3

4

P5

1

4

3

2

4

5

5

5

 

Considering the given snapshot, answer the following questions using the banker’s algorithm:

  • What will be the content of the matrix Available? 5 Marks
  • What will be the content of the matrix Need? 5 Marks
  • Is the system in a safe state Yes/No? If yes, then identify the safe sequence. 5 Marks  

 

Question No 2                                                                                                 5 Marks  

Consider the following resource allocation graph. Is there any deadlock in this graph or not? If yes, then mention the dead lock sequence.                   

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