Consider a computer system with the following allocation status for four non-sharable resources, A, B, C, D at a certain time: Allocation Max АВCD Available АВCD АВCD PO 0101 8532 2301 P1 3020 3220 P2 3021 6022 At this instant, P0 requests (0, 2, 0, 1). The Operating System applies Banker's Algorithm to decide whether or not to grant this request. Mark all the correct statements below based on this scenario: O Need (2) = 3001 O The system is currently deadlocked. O Granting this request brings the system to a safe state. O First row of Allocation matrix becomes 0302. O Need (0) = 8230

Consider a computer system with the following allocation status for four non-sharable resources, A, B, C, D at a certain time: Allocation Max АВCD Available АВCD АВCD PO 0101 8532 2301 P1 3020 3220 P2 3021 6022 At this instant, P0 requests (0, 2, 0, 1). The Operating System applies Banker's Algorithm to decide whether or not to grant this request. Mark all the correct statements below based on this scenario: O Need (2) = 3001 O The system is currently deadlocked. O Granting this request brings the system to a safe state. O First row of Allocation matrix becomes 0302. O Need (0) = 8230

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider the following snapshot of a system: Allocation Маx Available ABCD ABCD ABCD PO 2001 4212 3321 P1 3121 5252 P2 2103 2316 P3 1312 1424 P4 1432 3665 Answer the following questions using the banker's algorithm: a. llustrate that the system is in a safe state by demonstrating an order in which the processes may complete. b. If a request from process P1 arrives for (1, 1, 0, 0), can the request be granted immediately? c.Ifa request from process P4 arrives for (0, 0, 2, 0), can the request be granted immediately? Show transcribed image text
Consider a computer system which has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in any way that is, two in one shot or one by one. The system always satisfies a request for a resource if enough resources are available. If the processes don't request any other kind of resource, show that the system never deadlocks?
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Write a divide-and-conquer algorithm for the Towers of Hanoi problem. TheTowers of Hanoi problem consists of three pegs and n disks of differentsizes. The object is to move the disks that are stacked, in decreasing order oftheir size, on one of the three pegs to a new peg using the third one as atemporary peg. The problem should be solved according to the followingrules: (1) when a disk is moved, it must be placed on one of the three pegs;(2) only one disk may be moved at a time, and it must be the top disk on oneof the pegs; and (3) a larger disk may never be placed on top of a smallerdisk.(a) Show for your algorithm that S (n) = 2n − 1. (Here S (n) denotes thenumber of steps (moves), given an input of n disks.)(b) Prove that any other algorithm takes at least as many moves as given in
Suppose we have four machines that are using the Berkeley algorithm for clock synchronization. The time daemon is running on machine MO. The other machines are named M1, M2, and M3. The time readings on the four machines are as follows wenty-four hour clocks are usedt. MO 09:10 M1: 08:30 M2 10:10 M3: 07:14 In the third step of the algorithm, what are the values that the time daemon sends to each machine? Assume that the time values are expressed in minutes. Below, these values are presented in a vector value sent to MO, value sent to MI, value sent to M2. value sent to M3I none of these O84, 44, 96, 321 O(24, 16, -84, 92) O192. 84, 16. -24 O-32, 76, 40
Consider the following snapshot of a system: Allocation Мах АВCD АВCD Po P1 P2 P3 P4 3014 5117 2210 3211 3121 3321 0510 4612 4212 6325 Using the banker's algorithm, determine whether or not each of the following states is unsafe. If the state is safe, illustrate the order in which the processes may complete. Otherwise, illustrate why the state is unsafe. а. Available 3D (0, 3, 0, 1) b. Available = (1, 0, 0, 2) If a request from process P3 arrives for (3, 0, 2, 0), can the request be granted immediately?
Consider the following table as a snapshot of resources in a system: A (10 instances), B (5 instances), and C (7 instances). a) Write down the calculation steps to find a Safe/Unsafe state: b) Is this system in a safe state? If so, write the safe sequence. Allocation Max Available АВС АВС 332 Po P1 P2 P3 PA 010 753 200 322 302 902 211 222 002 433
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