26. A system has four processes and five allocatable resources. The current allocation and maximum needs are as follows: Available 00 x 1 1 Allocated Махітит Process A 10 211 11213 Process B 20110 22210 Process C Process D 11010 21310 1111 0 11221 What is the smallest value of x for which this is a safe state?
Q: A system has four processes, viz. P1 to P4, and three resource types. The system is in a safe state…
A: We will use the same logic we apply in banker's algorithm. Max = need+allocation
Q: Consider a computer system with the following allocation status for four non-sharable resources, A,…
A: Let's calculate the need of each process. Need = maximum - allocated A B C D P0 8 4 3 1…
Q: Deadlock A) A system has four processes and five resources. The Claim matrix, current Allocation…
A:
Q: Answer the following questions using the banker’s algorithm: How many instances of resources are…
A:
Q: Consider a computer system with the following allocation status for four non-sharable resources, A,…
A: Let's calculate the need of each process. Need = maximum - allocation The need matrix A B C D…
Q: Consider the following set of processes P1, P2, P3, P4, and with the length of the CPU burst time…
A: The answer is given below.
Q: Assume total resources = 11 Consider the following system state: Process Маx (Р.) Allocate ( P;) P1…
A: For doing this first we have to know what is a safe and unsafe state A state is safe if the system…
Q: Answer the following questions using the banker’s algorithm: How many instances of resources are…
A: How many instances of resources are present in the system under each type of a resource? => Total…
Q: First Come First Service (FCFS)? Preemptive Shortest Job first? Round-Robin with time quantum of
A: First Come First Service (FCFS), Preemptive Shortest Job first and Round-Robin with time quantum…
Q: 4. Consider the following set of processes, with the length of the CPU burst given in milliseconds:…
A: Turnaround time is the time difference between submission and completion of the process. First Come…
Q: A system contains five periodic implicit deadline tasks Ti, for i = 1,2,...,5. Their utilizations…
A: periodic implicit deadline tasks are t1,t2,t3,t4 and t5 and utilization are denoted by…
Q: 22. A system has two processes and three identical resources. Each process needs a maximum of two…
A: Given - p processes, max requirement m resources, r resources available. Now system will be…
Q: A system has four processes, viz. P1 to P4, and three resource types. The system is in a safe state…
A: Grant the request=[1 0 1] from P3. Because when the number of requested resources of each type is…
Q: Consider a system with three processes (P1, P2, and P3) and four resources (R1 has one instance, R2…
A: There are three process (P1,P2,P3) and four resources (R1,R2,R3,R4). P1 is assigned to R2 and…
Q: A deadlock avoidance algorithm dynamically examines the __________ to ensure that a circular wait…
A: Question A deadlock avoidance algorithm dynamically examines the __________ to ensure that a…
Q: Problem: Characterize the state of the system given the following table below with total resources…
A: Here, we are given 4 processes with resources R1 and R2. Available resources= Total - Alloc…
Q: :4 Processes (P1,P2,P3) arrived at time 0. The Duration of the processes are (2,4,6,8). All…
A: The waiting time of P0 is 0 the completion time of P0 is 8.88 waiting time P1 =8.88 similarly…
Q: 1. Consider the following set of processes, with the length of the CPU burst given in milliseconds…
A: The processes are assumed to have arrived in the order p1, p2, p3, and p4. The Gantt charts for…
Q: Consider the following set of processes, each of which needs a certain amount of a series of shared…
A: Consider the following set of processes, each of which needs a certain amount of a series of shared…
Q: Let S = {P1, P2 P3 P4} be the set of processes %3D arriving at time 0 and the length of CPU burst…
A: Given process p1 p2 p3 p4 with CPU burst times of 5 7 6 4 respectively
Q: 1. Consider the following set of processes, with the length of the CPU burst given in milliseconds.…
A: a)Four Gantt Charts are as follows
Q: Question no 02: Consider the following set of processes, with the length of the CPU burst given in…
A: a. Gantt chart 1. FCFS -First Come First Served Scheduling Criteria: Arrival time Mode:…
Q: Question no 02: Consider the…
A: Process Burst P1 32 P2 24 P3 4 P4 36 P5 12 FCFS Process Turn Around Time Waiting…
Q: 10. Consider the following set of processes, the length of the CPU burst time given in milliseconds:…
A: 10. Consider the following set of processes, the length of the CPU burst time given in milliseconds:…
Q: Banker’s Algorithm Assume a computer system with a total of 300 units of resources to be allocated…
A: Here in this question we have given three process with their max and hold matrix. availabe = 300…
Q: A system has 4 processes and 5 allocatable resource. The current allocation and maximum needs are as…
A: Introduction :Given , 4 process are given ,Number of resources are = 5.we have to calculate the…
Q: Draw resource allocation graph and explain if the system is in a deadlock or not? • Given 3…
A: Deadlock: When a resource is held by another process and at the same time is requested by some other…
Q: Consider the following set of six processes, with the arrival times, CPU burst time (in…
A: Consider the following set of six processes, with the arrival times, CPU burst time (in…
Q: Consider the following set of processes, with the length of the CPU burst time given in…
A: Arrival time of each process is 0. As per question larger priority number implies a higher priority…
Q: . A deadlock avoidance algorithm dynamically examines the __________ to ensure that a circular wait…
A: Explanation: Resource allocation states are used to maintain the availability of the already and…
Q: A system has four processes, viz. P1 to P4, and three resource types. The system is in a safe state…
A: system process request for given data is disscussed below:-
Q: Question 1 Consider following Producers and Consumer Problem where there are N Producers and…
A: Given, There are N producers and N consumers. The producers and consumers share the same memory…
Q: i) How many resources are there of type (A. B. C)? What is the contents of the Need marix? iii) Is…
A: Solution i) Type A has 3 resources because (2+1)=3 Type B has 14 resources because (9+5)=14 Type C…
Q: 12. Match the following: Scheduling Policies P. FCFS Selection function 1. max(w+s/s) 2. min(s - e)…
A: P)FCFC: Average waiting time is defined as the sum of total time waited before starting of the…
Q: Given 4 processes PO0 to P3, and 3 resource types: A (7 instances), B (3 instances), and C 5…
A:
Q: Consider the following snapshot of a system: Allocation Max Available Process АВСD ABCD АВСD 2001…
A: the solution is an given below :
Q: A system has 12 magnetic tape drives and 3 processes : P0, P1, and P2. Process P0 requires 10 tape…
A: Let's calculate the need of each process Need = maximum-allocated Need P0 5 P1 2 P2 7
Q: Consider five processes Po through P4; four resources A, B, C and D. At time t the snapshot of the…
A: Solution in step 2:
Q: 1. Let A, B and C be three different non-preemptible resource types. Assume maximum claims and…
A: Note: The solutions of the first three subparts are shown below. Please report the remaining subpart…
Q: A system has four processes and five allocatable resources. The current allocation and maximum needs…
A: The smallest value of x for given system in safe state
Q: Question no 02: Consider the following set of processes, with the length of the CPU burst given in…
A:
Q: 4. Consider the following set of processes, with the length of the CPU burst given in milliseconds:…
A: Consider Set of Process a. Gantt chart for FCFS(First Come First Server) Gantt chart for…
Q: 1. Schedule the following programs with listed workload and burst time and calculate average wait…
A:
Q: An operating system uses the Banker's algorithm for deadlock avoidance when managing the allocation…
A: EXPLANATION: We'll discover the Need matrix using the banker's approach, and we'll try to come up…
Q: The following table represents the present state of a system Process Allocated Маx Available R1 R2…
A:
Q: A system has four processes, viz. P1 to P4, and three resource types. The system is in a safe state…
A: we need to find, if the given resources can be granted to the processes. We use Bankers algorithm.
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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?(i) Describe Banker’s algorithm for deadlock avoidance with supporting example Consider a computer system with 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 anyway, that is, two in one shot or one by one. The system always satisfies a request a request for a resource if enough resources are available. If the process doesn’t request any other kind of resource, show that the system never deadlock Give a solution for the following synchronization problem using semaphores Producer- Consumer Problem Readers- Writers Problem List out the issues in preprocessor scheduling that causes performance degradation in multiprocessor systemsCh-6 1. The first known correct software solution to the critical-section problem for n processes with a lower bound on waiting of n − 1 turns was presented by Eisenberg and McGuire. The processes share the following variables: enum pstate { idle, want_in, in_cs}; pstate flag[n]; int turn; All the elements of flag are initially idle. The initial value of turn is immaterial (between 0 andn-1).ThestructureofprocessPi isshowninthefollowingFigure.Provethatthe algorithm satisfies all three requirements for the critical-section problem.
- An operating system has 3 user processes running in a set, each requiring 2 units of resource R. The minimum number of units of R such that no deadlocks will ever arise is:Consider a computer system to which two types ofcomputer jobs are submitted. The mean time to run eachtype of job is m1. The interarrival times for each type of jobare exponential, with an average of li type i jobs arrivingeach hour. Consider the following three situations. a Type 1 jobs have priority over type 2 jobs, and pre-emption is allowed. b Type 1 jobs have priority over type 2 jobs, and nopreemption is allowed.c All jobs are serviced on a FCFS basis.Under which system are type 1 jobs best off? Worst off?Answer the same questions for type 2 jobs.QUESTION TWO A. (i) Describe Banker’s algorithm for deadlock avoidance with supporting example (ii)Consider a computer system with 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 anyway, that is, two in one shot or one by one. The system always satisfies a request a request for a resource if enough resources are available. If the process doesn’t request any other kind of resource, show that the system never deadlock B. Give a solution for the following synchronization problem using semaphores (i)Producer- Consumer Problem (ii)Readers- Writers Problem C. List out the issues in preprocessor scheduling that causes performance degradation in multiprocessor systems
- List/explain 3 different ways that a system can recover from deadlock. Know the necessary conditions for deadlock and explanations of each. Why is it necessary to have an atomic instructions for providing access to a critical section? Consider a system with 5 processes (A, B, C, D and E) and 5 single instances of resources (Q, R, S, T, U) with given assignments (A holds R and wants T, C holds T and wants Q, etc). Construct a resource allocation graph. Determine if deadlock occurred. Draw a wait-for graph of the system. It's a C ProgrammingOn a real computer system, neither the resources available nor the demands of processes forresources are consistent over long periods (months). Resources break or are replaced, newprocesses come and go, new resources are bought and added to the system. If deadlock iscontrolled by the banker's algorithm, which of the following changes can be made safely(without introducing the possibility of deadlock), and under what circumstances?a) Increase Available (new resources added).b) Decrease, Available (resource permanently removed from system).c) Increase Max for one process (the process needs more resources than allowed; it maywant more).d) Decrease Max for one process (the process decides it does not need that manyresources).e) Increase the number of processes.Banker’s Algorithm Assume a computer system with a total of 300 units of resources to be allocated to processes as shown: Process Max Hold P1 140 90 P2 120 80 P3 120 30 Determine if the following requests are safe or unsafe using the Banker’s Algorithm with solutions. P4 arrives with a maximum memory of 120 and allocation of 50 units. P4 arrives with a maximum memory of 120 and allocation of 70 units.
- A system contains five periodic implicit deadline tasks Ti, for i = 1,2,...,5. Their utilizations areu1=0.8, u2 = u3 = u4 = u5 = 0.003. Are these tasks schedulable rate-monotonicallyif all tasks share the same period? What if only tasks T2, T3, T4, and T5 share the same period length? What if we do not know anything about the periods? Explain why.An Operating System Resource Allocation Graph G shows processes and needed resources. Which graph condition proves that deadlock cannot occur? Which proves that deadlock is possible? Which condition is proof of deadlock?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. Suppose B request 2 additional instances of resource type X and 1 instance for resource type Y, can the request be granted? Is the system safe? If yes, what is the safe sequence?