Chapter 27

Question 1

What is deadlock handling

Answer 1

• Deadlock prevention
• Deadlock avoidance
• Deadlock detection and recovery

Question 2

What is low resources utilization

Answer 2

When a process request all of its resource, and when he is able to receive all of them then start utilizing. It is low resources utilization.

Question 3

What is Deadlock prevention

Answer 3

In Deadlock prevention, we try to prevent any one of the four conditions that are necessary to deadlock to occur. i.e.

1. Circular wait
2. Mutual exclusion
3. Hold and wait
4. No Preemption

Question 4

What is Deadlock avoidance

Answer 4

A safe sequence of processes and allocation of resources ensures a safe state. Deadlock avoidance algorithms try not to allocate resources to a process if it will make the system in an unsafe state.

Question 5

Does deadlock avoidance ensures that there can never be a circular-wait condition

Answer 5

Yes

Question 6

What is safe state

Answer 6

System is in a safe state if all process exists in a safe sequence.

Question 7

What is safe sequence

Answer 7

The order in which we finish the execution of all process of a system is called safe sequence.

Question 8

If system is in safe state then there can not be deadlock and if system is in unsafe state then there is possibility of deadlock. True/false

Answer 8

True