(1) Process 0 requests resource 2. After the operation: Process D is ready Resource 2 is Select 3 Resource 2's waiting list Select RL contains the processes Ex: 1, 2, 3 (2) Process 0 requests resource 0. After the operation: Process 0 is Select Resource 0 is Select Resource 0's waiting list Select RL contains the processes Ex: 1, 2, 3
(1) Process 0 requests resource 2. After the operation: Process D is ready Resource 2 is Select 3 Resource 2's waiting list Select RL contains the processes Ex: 1, 2, 3 (2) Process 0 requests resource 0. After the operation: Process 0 is Select Resource 0 is Select Resource 0's waiting list 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
Related questions
Question
![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.
439508,3112870 qx3zqy7
Jump to level 1
The ready list RL contains processes 0 then 3. Consider (1), (2) as independent operations.
PCB 0
PCB 1
PCB 2
PCB 3
process state running
other resources
state
waiting list
***
***
Check
free
RCB 0
3
Next
440
2
***
blocked
***
(1) Process 0 requests resource 2. After the operation:
Process 0 is ready
Resource 2 is Select V
RCB 1
allocated
(2) Process 0 requests resource 0. After the operation:
Process 0 is Select
Resource 0 is Select
HY
blocked
3
***
****
RCB 2
allocated
***
ready
***
RCB 3
allocated
***
Resource 2's waiting list Select
RL contains the processes Ex: 1,2,3
Resource 0's waiting list Select
RL contains the processes Ex: 1, 2, 3
2
5
2
>> DDD](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb97a9e49-f5c1-4ea5-8736-c78f0d8c614a%2F0ee264d2-0bb4-444f-976b-76623f5b1421%2Fy5k6qv_processed.jpeg&w=3840&q=75)
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.
439508,3112870 qx3zqy7
Jump to level 1
The ready list RL contains processes 0 then 3. Consider (1), (2) as independent operations.
PCB 0
PCB 1
PCB 2
PCB 3
process state running
other resources
state
waiting list
***
***
Check
free
RCB 0
3
Next
440
2
***
blocked
***
(1) Process 0 requests resource 2. After the operation:
Process 0 is ready
Resource 2 is Select V
RCB 1
allocated
(2) Process 0 requests resource 0. After the operation:
Process 0 is Select
Resource 0 is Select
HY
blocked
3
***
****
RCB 2
allocated
***
ready
***
RCB 3
allocated
***
Resource 2's waiting list Select
RL contains the processes Ex: 1,2,3
Resource 0's waiting list Select
RL contains the processes Ex: 1, 2, 3
2
5
2
>> DDD
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