The ready list RL contains processes 2 then 3. Consider (1), (2) as independent operations. РСВ З РСВО PCB 1 РСВ 2 process_state blocked blocked running ready -2 other_resources ... ... RCB 0 RCB 1 RCB 2 RCB 3 state free allocated allocated allocated waiting_list 1 (1) Process 2 requests resource 0. After the operation: Process 2 is Select v Resource O's waiting list Select Resource O is Select RL contains the processes Ex: 1, 2, 3 (2) Process 2 requests resource 3. After the operation: Process 2 is Select v Resource 3's waiting list Select Resource 3 is Select RL contains the processes Ex: 1, 2, 3

The ready list RL contains processes 2 then 3. Consider (1), (2) as independent operations. РСВ З РСВО PCB 1 РСВ 2 process_state blocked blocked running ready -2 other_resources ... ... RCB 0 RCB 1 RCB 2 RCB 3 state free allocated allocated allocated waiting_list 1 (1) Process 2 requests resource 0. After the operation: Process 2 is Select v Resource O's waiting list Select Resource O is Select RL contains the processes Ex: 1, 2, 3 (2) Process 2 requests resource 3. After the operation: Process 2 is Select v Resource 3's waiting list Select Resource 3 is Select RL contains the processes Ex: 1, 2, 3

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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P and Q are two processes that share a set of variables that is common. The variable includes: seq, tA and tB: Before either process starts to execute, variable seg initially has the value 10. State the possible sets of different values of seg when both processes have finished executing. Provide an order of execution of statements from processes P and Q that would produce each of the values you give. Justify your answer in detail.
P and Q are two processes that share a set of variables that is common. The variable includes: seq, tA and tB: Before either process starts to execute, variable seg initially has the value 10. State the possible sets of different values of seg when both processes have finished executing. Provide an order of execution of statements from processes P and Q that would produce each of the values you give. Justify your answer in detail. P P1: tA= seq + 1; P2: seq = tA; tily has the value 10. Q Q1: tB = seq+ 2; Q2: seq = tB;
b. Upon creation, 3 processes (A, B and C) are admitted into the ready queue in quick i.e., one immediately after another. You notice the processes always successfully terminate in the order A, B, C-and the average turnaround time is always the same - irrespective of the order in which the processes are first admitted into the ready queue. The processes make no 10 requests and have different service times. succession 1. What scheduling policy could the OS be employing? Explain why you think this. Name 3 scheduling policies that are not employed by the OS. Explain why you II. think this for each policy you mention.
answer this 2 subparts please
P and Q are two processes that share a set of variables that is common. The variable includes: seq, tA and tB: Before either process starts to execute, variable seg initially has the value 10. State the possible sets of different values of seg when both processes have finished executing. Provide an order of execution of statements from processes P and Q that would produce each of the values you give. Justify your answer in detail. P ... P1: tA= seq + 1; P2: seq = tA; .. atle seg inally has the value 10 Q1: tB = seq+ 2; Q2: seq = tB;
LAB MAKEUP 1 Initial value of shared variable m is equal to 0. Four threads A, B, Y, Z use this variable as follows: Processes A and B increase the value of m by 1. Processes Y and Z decrease the value of m by 1. Since m is shared, each process protects the critical region using semaphore S initialized to 2. Run your program to show that it is possible that m's value can be equal 2 after all processes run once. S=2 Proses A W(S) m=m+1 S(S) ADD TEXT OF YOUR CODE HERE Proses B W(S) m=m+1 S(S) ADD PRINTSCREEN OF YOUR OUTPUT HERE Proses Y W(S) m=m-1 S(S) Proses Z W(S) m=m-1 S(S)
Operating system -pls fill in the blanks for the following questions.
A Deadlock condition in which, multiple processes are not allowed to use the same resource at the same time. This condition is known as a. Mutual Exclusion O b. Hold and Wait O c. No Preemption O d. Circular Wait
P and Q are two processes that share a set of variables that is common. The variable includes: seq, tA and tB: Before either process starts to execute, variable seg initially has the value 10. State the possible sets of different values of seg when both processes have finished executing. Provide an order of execution of statements from processes P and Q that would produce each of the values you give. Justify your answer in detail. ... P1: tA = seq + 1; P2: seq tA; Q1: tB = seqt 2; Q2: seq = tB; %3D %3D
4. With a single resource, deadlock occurs a. if there are more than two processes competing for that resource b. if there are only two processes competing for that resource c. if there is a single process competing for that resource d. none of these