Homework Answers
Answer: True.
- Consider all the processes, resources as nodes.
- Request and holdings as edges.
- Then try to find out cycles in the graph.
- If there is a cycle in the single instance resource allocation graph then there is deadlock.
- If there is no cycle then there is no dead lock.
- Now look at the graph, i found a loop that is P1 - R2 - P0 - R3 - P3 - R1 - P1.
- We have started at P1 and found a loop back to P1, which is a cycle.
- There is a cycle, so there is a dead lock.
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Q. Consider the following resource allocation graph (RAG) involving six resources (Ro,...,Rs} and four processes Po....,P3}....
In the code below, three processes are competing for six resources labeled A to F. a....
In the code below, three processes are competing for six resources labeled A to F. a. Determine a sequence of requests and locks that results in a deadlock among the 3 processes. You could, for example, for each process list which resources it currently has locked (Allocated) and which resource it is requesting. Hint: it might be useful to draw a resource allocation graph to help you find a deadlock. b. Modify the order of some of the get requests...
A system has five processes P1 through P5 and four resource types R1 through R4. There...
A system has five processes P1 through P5 and four resource types R1 through R4. There are 2 units of each resource type. Given that: P1 holds 1 unit of R1 and requests 1 unit of R4 P2 holds 1 unit of R3 and requests 1 unit of R2 P3 holds one unit of R2 and requests 1 unit of R3 P4 requests 1 unit of R4 P5 holds one unit of R3 and 1 unit of R2, and requests...
Part B (10) Deadlock Avoidance Consider the following maximum-claim reusable resource system with four processes and...
Part B (10) Deadlock Avoidance Consider the following maximum-claim reusable resource system with four processes and three resource types. The maximum claim matrix is given by C [4 3 5 11 1 41 1 4 6 13 1 6] where Cij denote maximum claim of process i for resourcej. The total units of each resource type are given by the vector (5, 8, 15). The current allocation of resources is given by the matrix To 1 4] 2 0 1...
Please give an explanation for the answers as well. 1. A system has three processes (P1,...
Please give an explanation for the answers as well. 1. A system has three processes (P1, P2, and P3) and three resources (R1, R2, and R3). There is one instance of RI, two instances of R2, and three instances of R3. PI holds RI and one instance of R3 and is requesting one instance from R2. P2 holds one instance of R3 and is requesting RI and one instance from R2. P3 holds two instances of R2 and one instance...
I have done the a and b, but i'm so confuse with other questions, could someone help me to fix these questions, thanks so much. 4 Directed graphs Directed graphs are sometimes used operating syst...
I have done the a and b, but i'm so confuse with other
questions, could someone help me to fix these questions, thanks so
much.
4 Directed graphs Directed graphs are sometimes used operating systems when trying to avoid deadlock, which is a condition when several processes are waiting for a resource to become available, but this wil never happen because Page 2 p2 T2 Figure 1: Minimal example of a resource allocation graph with deadlock other processes are holding...
Write a C program for: One technique for dealing with deadlock is called “detect and recover.” In...
Write a C program for:
One technique for dealing with deadlock is called “detect and
recover.” In this scheme, some procedure is used
to identify when a deadlock occurs, and then another procedure
is used to deal with the blocked processes. One technique to
identify a deadlock is to maintain a resource graph that identifies
all processes, all resources, and the relationships between them
(that is, which processes exclusively own which resources, and
which processes are blocked waiting for which...
Part A (Worth 60%) 1. Answer four of the following- each question carries equal weight. In...
Part A (Worth 60%) 1. Answer four of the following- each question carries equal weight. In each case answer True, False or Uncertain and explain your answer. Limit each answer to one page (a) A firm has a production function in which the marginal product of capital does not depend on the amount of labour used. Based only on the information provided then Q-K+L, where Q is output, K is capital and L is labour would be a valid representation...
PART I: Multiple Choice Write all answers to the following questions. No partial credit available. Consumption...
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6. Which of the following is often referred to as the franchisee's "bible? A. the franchisor's...
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Chapter overview 1. Reasons for international trade Resources reasons Economic reasons Other reasons 2. Difference between...
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Part B (10) Deadlock Avoidance Consider the following maximum-claim reusable resource system with four processes and three resource types. The maximum claim matrix is given by C [4 3 5 11 1 41 1 4 6 13 1 6] where Cij denote maximum claim of process i for resourcej. The total units of each resource type are given by the vector (5, 8, 15). The current allocation of resources is given by the matrix To 1 4] 2 0 1...
Please give an explanation for the answers as well. 1. A system has three processes (P1, P2, and P3) and three resources (R1, R2, and R3). There is one instance of RI, two instances of R2, and three instances of R3. PI holds RI and one instance of R3 and is requesting one instance from R2. P2 holds one instance of R3 and is requesting RI and one instance from R2. P3 holds two instances of R2 and one instance...
I have done the a and b, but i'm so confuse with other
questions, could someone help me to fix these questions, thanks so
much.
4 Directed graphs Directed graphs are sometimes used operating systems when trying to avoid deadlock, which is a condition when several processes are waiting for a resource to become available, but this wil never happen because Page 2 p2 T2 Figure 1: Minimal example of a resource allocation graph with deadlock other processes are holding...
Write a C program for:
One technique for dealing with deadlock is called “detect and
recover.” In this scheme, some procedure is used
to identify when a deadlock occurs, and then another procedure
is used to deal with the blocked processes. One technique to
identify a deadlock is to maintain a resource graph that identifies
all processes, all resources, and the relationships between them
(that is, which processes exclusively own which resources, and
which processes are blocked waiting for which...
Part A (Worth 60%) 1. Answer four of the following- each question carries equal weight. In each case answer True, False or Uncertain and explain your answer. Limit each answer to one page (a) A firm has a production function in which the marginal product of capital does not depend on the amount of labour used. Based only on the information provided then Q-K+L, where Q is output, K is capital and L is labour would be a valid representation...
6. Which of the following is often referred to as the franchisee's "bible? A. the franchisor's business plan B. the franchising agreement or contract C. the PERT chart D. the operations manual 7. The most important section of the business plan is: A. The Management Segment B. The Executive Summary C. The Marketing Segment D. The Legal Requirements I 8. In urban areas, approximately how much of a store's business is done by people who live or work within a...
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