UGC-NET DEC-2019 Part-2
November 27, 2023Question 7680 – UGC-NET DEC-2019 Part-2
November 27, 2023UGC-NET DEC-2019 Part-2
| Question 15 |
Suppose a system has 12 magnetic tape drives and at time to, three processes are allotted tape drives out of their need as given below:
At time to, the system is in safe state. Which of the following is safe sequence so that deadlock is avoided?
| (p0, p1, p2) | |
| (p1, p0, p2) | |
| (p2, p1, p0) | |
| (p0, p2, p1) |
Question 15 Explanation:
Out of Total 12 resources, 9 resources are allocated. So the remaining resources are 3.
With 3 resources process P1 requirements can be fulfilled. So after that total resources will be 3+ resources allocated to P1(i.e. 3+2= 5)
Now process P0 requirement will be fulfilled. So after that total resources will be 5+ resources allocated to P0(i.e. 5+5=10)
Now process P2 requirement will be fulfilled. So after that total resources will be 10+ resources allocated to P2(i.e. 10+2=12)
Correct Answer: B
Question 15 Explanation:
Out of Total 12 resources, 9 resources are allocated. So the remaining resources are 3.
With 3 resources process P1 requirements can be fulfilled. So after that total resources will be 3+ resources allocated to P1(i.e. 3+2= 5)
Now process P0 requirement will be fulfilled. So after that total resources will be 5+ resources allocated to P0(i.e. 5+5=10)
Now process P2 requirement will be fulfilled. So after that total resources will be 10+ resources allocated to P2(i.e. 10+2=12)