The following diagram shows the process_state and other_resources fields of 4 processes in the PCB array. The RCB array shows the state and the waiting list of 4 resources. The ready list RL contains processes 1 then 0. Consider (1), (2) as independent operations. PCB 0 PCB 1 PCB 2 PCB 3 process state ready other_resources *** waiting list *** *** state allocated RCB 0 2 *** *** *** running *** RCB 1 free (1) Process 1 requests resource 1. After the operation: Process 1 is Select Resource 1 is Select *** (2) Process 1 requests resource 3. After the operation: Process 1 is Select Resource 3 is Select blocked *** *** RCB 2 allocated *** 0-0 3 2 blocked *** RCB 3 allocated *** Resource 1's waiting list Select RL contains the processes Ex: 1,2,3 Resource 3's waiting list Select RL contains the processes Ex: 1,2,3 -3-0 Ⓒ
The following diagram shows the process_state and other_resources fields of 4 processes in the PCB array. The RCB array shows the state and the waiting list of 4 resources. The ready list RL contains processes 1 then 0. Consider (1), (2) as independent operations. PCB 0 PCB 1 PCB 2 PCB 3 process state ready other_resources *** waiting list *** *** state allocated RCB 0 2 *** *** *** running *** RCB 1 free (1) Process 1 requests resource 1. After the operation: Process 1 is Select Resource 1 is Select *** (2) Process 1 requests resource 3. After the operation: Process 1 is Select Resource 3 is Select blocked *** *** RCB 2 allocated *** 0-0 3 2 blocked *** RCB 3 allocated *** Resource 1's waiting list Select RL contains the processes Ex: 1,2,3 Resource 3's waiting list Select RL contains the processes Ex: 1,2,3 -3-0 Ⓒ
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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Transcribed Image Text:The following diagram shows the process_state and other_resources fields of 4 processes in the PCB array. The RCB array shows
the state and the waiting list of 4 resources.
The ready list RL contains processes 1 then 0. Consider (1), (2) as independent operations.
PCB 0
PCB 1
PCB 2
PCB 3
process state ready
other resources
***
waiting_list
state allocated
RCB 0
2
Show Transcribed Text
running
RCB 1
free
(1) Process 1 requests resource 1. After the operation:
Process 1 is Select
Resource 1 is Select ✪
(2) Process 1 requests resource 3. After the operation:
Process 1 is Select
Resource 3 is Select ŷ
blocked
RCB 2
This is a 2 part question, please answer both (1) and (2).
allocated
6-7
blocked
***
***
RCB 3
Resource 1's waiting list Select
RL contains the processes Ex: 1, 2, 3
allocated
Resource 3's waiting list Select
RL contains the processes Ex: 1, 2, 3
♥
3-0
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