A system has four processes, viz. P1 to P4, and three resource types. The system is in a safe state with011]624435Available [111], Max =L121granted?(a) Request = [1 0 1] from P3.(b) Request[101] from P2.and Allocation =[001]42333310 2 1.Which of the following requests should be

The topic discussed is resource allocation in a system with multiple processes and resource types.…

Answered: A system has four processes, viz. P1 to…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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For Heap File with a page directory, assume that a page can contain up to 100 directory entries and a page can contain 1000 records, for a file of 1,000,000 records, what is the number of pages to store these records, assuming that on average data pages are filled up 70%? With this data page utilization, what is the number of pages to store the directory, assuming that each directory page is full? Assuming both the directory and the file are stored on disk, what is the I/O cost to insert one record in worst case, and in the average case?
QUESTION 2 Assume that there are : • 3 processes P1, P2, & P3 o 3 Resources R1( two instances), R2 (one instance), & R3 (two instances) And the processes make the requests for resources in the following order: o Pl requests R1 o P2 requests R2 o Pl requests R2 o P3 request R3 • P3 Request R2 o P2 request R3 Draw the resource allocation graph and find whether deadlock exists? Justify your answer.
Guests are arriving at a party at a rate of 12 per minute. Each guest will be checked in by a receptionist, served a drink by a bartender, and accompanied to his/her table by one usher. Both the receptionist and usher can serve 10 guests per minute, whereas the bartender takes 5 minutes to serve one guest. The is a non bottleneck resource and its utilization is bartender, 100% receptionist, 20% usher, 100% usher, 2%
Suppose that an operating system supports two kinds of sequential processes: high-priority interactive processes, and low-priority non-interactive processes. The behavior of the high-priority processes is to alternate between periods of computation of duration Tc and periods of blocking (waiting for input) of duration Tb. The behavior of the low-priority processes is to compute constantly, with no blocking. The operating system’s scheduling policy is round-robin with a quantum q, where Tc < q. Scheduling decisions are made only when a quantum expires, or when the running process blocks. The scheduler selects a low-priority process to run only if no high-priority processes are ready. Suppose there is one high-priority process and one low-priority process in the system, and that both processes will run for a long time. For what fraction of the time does the low-priority process run?
Consider a system with five processes and three resource type. Resource type X has 7 instances, resource type Y has 10 instances and resource type Z has 5 instances. Suppose that at time 0, the following snapshot of the system has been taken. What is the content of the matrix Need?
a. Three processes share four resource units that can be reserved and released only one at a time. Each process needs a maximum of two units. Show that a deadlock cannot occur. b. N processes share M resource units that can be reserved and released only one at a time. The maximum need of each process does not exceed M, and the sum of all maximum needs is less than M + N. Show that a deadlock cannot occur.
1. Let A, B and C be three different non-preemptible resource types. Assume maximum claims and current resource assignments for four processes P0, P1, P2, and P3, are given in the following table, along with the total number of allocated resources for each process. Маx Allocation Available АВС АВС АВС РО 001 001 P1 175 100 P2 235 135 P3 065 063 Total 299 152 a) How many resources are there of type (AB.C)? b) What is the contents of the Need matrix? c) Is the system in a safe state? Why? d) If a request from process P1 arrives for additional resources of (0,5,2), can the Banker's algorithm grant the request immediately?
I eant solution with step
1.5. Given the following state of system: the system comprises of four processes and three resouroes. P1-P4 denotes the set of processes R1- R3 denotes the set of resources Claim Matrix C RI R2 R3 P1 4 5 3 213 P2 P31 2 3 P4 Allocation Matrix A R1R2 R3 2 0 P2 Available Matrix V RI R2 R3 1.5.1 Compute the Resouroe vector R. 1.5.2 Compute the need Matrix Is the curent allocation state safe? If, give a safe sequence of the process. In addition, show how the Available (working array) changes as each 1.5.3 process temminates
Consider the following system with 4 processes and 2 resources. The allocation and request matrices and available vector are given below. Request Matrix Process A B 4 3 12 17 Allocation Matrix Available B Process A B P1 4 P1 A P2 1 3 P2 4 5 P3 1 2 P3 P4 P4 5 1 What will be the available for A and B after the execution of process P1? O a. A = 8, B = 6 O b. None of these O .A = 6, B = 4 O d. A = 8, B = 8 O e. A = 6, B = 8

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A system has four processes, viz. P1 to P4, and three resource types. The system is in a safe state with [011] 624 435 [121] Available = [1 1 1], Max = granted? (a) Request = [101] from P3. (b) Request = [101] from P2. and Allocation = [001] 423 333 10 2 1J Which of the following requests should be