1. Considering a syslem with five processes P0 through P4 and three resources lypes A, B, C. Resource type A has 7 instances, B has 10 instances and type C has 5 instances. Suppose at time to following snapshot of the system has been taken: Proccss Allocation Маx Available A В C A В A B PO 3 7 3 3 P1 2 2 3 2 P2 2 3 P3 1 1 2 2 2 P4 2 3 4 3 i) ii) What will be the content of need matrix? Is the system in safe state? If yes, then what is the safe sequence? in

1. Considering a syslem with five processes P0 through P4 and three resources lypes A, B, C. Resource type A has 7 instances, B has 10 instances and type C has 5 instances. Suppose at time to following snapshot of the system has been taken: Proccss Allocation Маx Available A В C A В A B PO 3 7 3 3 P1 2 2 3 2 P2 2 3 P3 1 1 2 2 2 P4 2 3 4 3 i) ii) What will be the content of need matrix? Is the system in safe state? If yes, then what is the safe sequence? in

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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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?
Given 4 processes PO to P3, and 3 resource types: A (7 instances), B (3 instances), and C (5 instances). Suppose a snapshot taken for the system at time To as follows: Allocation Мах Available ABC ABC ABC Po 200 4 1 2 111 P1 10 1 1 1 2 P2 3 1 1 4 3 1 P3 0 1 2 3 2 4 A- Apply Banker's algorithm to determine if the system is in a SAFE or UNSAFE state? Note: show all the changes made to the available resources (work). B- If the system is safe, what is the execution sequence of processes that avoids deadlock? [if unsafe, just write NONE] C- To avoid deadlock, can a request for resources (1,2,0) by P2 be granted? why?
Consider a system with five processes (P1-P5) and four resources (R1-R4) where R1 has 3, R2 has 8, R3 has 6 and R4 has 6 instances. By considering the snapshot of the system given below: a. What is the content of the matrix Need? b. What is the content of the vector Available? Allocation Max R1 R2 R3 R4 R1 R2 R3 R4 P1 1 1 2 P2 1 6. 5 2 P3 1 6 6 P4 1 1 P5 4. 1 7 6, 2. LO 3. 2. 3. 3.
To not let any process wait longer than 500 ms, a system developer programs the Round Robin procedure with a dynamic time quantum size. With ‘n’ processes ready, the time quantum Q is set to 500 ms/n. What do you think of this scheduling strategy? (In which situations is this strategy feasible, and when is it not? Are there edge cases?) Explain your reasoning.
In the Dinning-Philoshper problem, Deadlock might occur due to Select one: a. non-sharing resources b. non-preemptive nature of resource held by processes c. All of these options d. hold and wait situation of the resources by the processes which deduce further circular wait
All sub parts please
QUESTION 3 Suppose the system has 4 processes and 3 resources At time T15 the snapsbot of the system is taken and given below which of the following options is a safe sequence? Total number of resources-12, 8, 6 Available number of resources-0, 3, 1 Allocation matrie P1 P1 2. P2 1. P2 2. P4 2 P4 O P1. P2. P3, P4 O P4, P1, P3. P2 P1, P3, P2, P4 No safe sequence Saut Arpe Cese Click Save and Submit to save and submit. Click Save All Ansuvers to save all aners, OAC
Consider a system consisting of four processes and a single resource. The current state of the claim and allocation matrices are 44 A = What is the minimum number of units of the resource needed to be available for this state to be safe?
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Do Execution Paths 3 and 4 encompass the first three conditions for a deadlock to occur? Explain your answer.
3. Please Help me to solve the following all the subparts perfectly on word: PS: You just need to show the prove or disprove (for a) and show the prove or show if it is true (for b).