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Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:
R1 = F(Printer) = 12
R2 = F (Tape Drive) = 1
R3 = F(Disk Drive) = 4
Which of the following access patterns necessarily avoids deadlock?
R1 = F(Printer) = 12
R2 = F (Tape Drive) = 1
R3 = F(Disk Drive) = 4
Which of the following access patterns necessarily avoids deadlock?
- a)R1, R3, R2
- b)R2, R3, R1
- c)R1, R2, R3
- d)R3, R2, R1
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Consider a system with three resources, tape drive, printer and disk d...
To avoid deadlock, we must request the devices in ascending order of enumeration. This ensures that circular wait does not hold. The correct sequence is 1, 4, 12, i.e. R2, R3, R1.
Most Upvoted Answer
Consider a system with three resources, tape drive, printer and disk d...
Understanding the question:
In this question, we are given three resources - tape drive, printer, and disk drive - each with a unique number assigned to them. We need to determine which access pattern among the given options necessarily avoids deadlock.
Deadlock:
Deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource. It can occur when multiple processes acquire resources in such a way that each process holds one resource and is waiting for another resource that is held by another process.
Resource Allocation Graph (RAG):
To analyze the given access patterns, we can use the concept of a Resource Allocation Graph (RAG). A RAG consists of nodes representing processes and resources, and edges representing the allocation and request relationships.
Analysis of access patterns:
Let's analyze each access pattern to determine if it can lead to a deadlock:
a) R1, R3, R2:
- Process P1 acquires R1 (Printer).
- Process P2 acquires R3 (Disk Drive).
- Process P3 acquires R2 (Tape Drive).
- No process is requesting a resource that is currently held by another process.
- This access pattern does not lead to a deadlock.
b) R2, R3, R1:
- Process P1 acquires R2 (Tape Drive).
- Process P2 acquires R3 (Disk Drive).
- Process P3 acquires R1 (Printer).
- No process is requesting a resource that is currently held by another process.
- This access pattern does not lead to a deadlock.
c) R1, R2, R3:
- Process P1 acquires R1 (Printer).
- Process P2 requests R2 (Tape Drive), but it is currently held by Process P3.
- Deadlock can occur as P2 is waiting for R2, which is held by P3.
d) R3, R2, R1:
- Process P1 acquires R3 (Disk Drive).
- Process P2 requests R2 (Tape Drive), but it is currently held by Process P3.
- Deadlock can occur as P2 is waiting for R2, which is held by P3.
Conclusion:
Based on the analysis, the access patterns R1, R3, R2 and R2, R3, R1 do not lead to a deadlock. However, the access patterns R1, R2, R3 and R3, R2, R1 can potentially lead to a deadlock. Therefore, the correct answer is option B.
In this question, we are given three resources - tape drive, printer, and disk drive - each with a unique number assigned to them. We need to determine which access pattern among the given options necessarily avoids deadlock.
Deadlock:
Deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource. It can occur when multiple processes acquire resources in such a way that each process holds one resource and is waiting for another resource that is held by another process.
Resource Allocation Graph (RAG):
To analyze the given access patterns, we can use the concept of a Resource Allocation Graph (RAG). A RAG consists of nodes representing processes and resources, and edges representing the allocation and request relationships.
Analysis of access patterns:
Let's analyze each access pattern to determine if it can lead to a deadlock:
a) R1, R3, R2:
- Process P1 acquires R1 (Printer).
- Process P2 acquires R3 (Disk Drive).
- Process P3 acquires R2 (Tape Drive).
- No process is requesting a resource that is currently held by another process.
- This access pattern does not lead to a deadlock.
b) R2, R3, R1:
- Process P1 acquires R2 (Tape Drive).
- Process P2 acquires R3 (Disk Drive).
- Process P3 acquires R1 (Printer).
- No process is requesting a resource that is currently held by another process.
- This access pattern does not lead to a deadlock.
c) R1, R2, R3:
- Process P1 acquires R1 (Printer).
- Process P2 requests R2 (Tape Drive), but it is currently held by Process P3.
- Deadlock can occur as P2 is waiting for R2, which is held by P3.
d) R3, R2, R1:
- Process P1 acquires R3 (Disk Drive).
- Process P2 requests R2 (Tape Drive), but it is currently held by Process P3.
- Deadlock can occur as P2 is waiting for R2, which is held by P3.
Conclusion:
Based on the analysis, the access patterns R1, R3, R2 and R2, R3, R1 do not lead to a deadlock. However, the access patterns R1, R2, R3 and R3, R2, R1 can potentially lead to a deadlock. Therefore, the correct answer is option B.
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Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:R1 = F(Printer) = 12R2 = F (Tape Drive) = 1R3 = F(Disk Drive) = 4Which of the following access patterns necessarily avoids deadlock?a)R1, R3, R2b)R2, R3, R1c)R1,R2, R3d)R3, R2, R1Correct answer is option 'B'. Can you explain this answer?
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Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:R1 = F(Printer) = 12R2 = F (Tape Drive) = 1R3 = F(Disk Drive) = 4Which of the following access patterns necessarily avoids deadlock?a)R1, R3, R2b)R2, R3, R1c)R1,R2, R3d)R3, R2, R1Correct answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:R1 = F(Printer) = 12R2 = F (Tape Drive) = 1R3 = F(Disk Drive) = 4Which of the following access patterns necessarily avoids deadlock?a)R1, R3, R2b)R2, R3, R1c)R1,R2, R3d)R3, R2, R1Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:R1 = F(Printer) = 12R2 = F (Tape Drive) = 1R3 = F(Disk Drive) = 4Which of the following access patterns necessarily avoids deadlock?a)R1, R3, R2b)R2, R3, R1c)R1,R2, R3d)R3, R2, R1Correct answer is option 'B'. Can you explain this answer?.
Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:R1 = F(Printer) = 12R2 = F (Tape Drive) = 1R3 = F(Disk Drive) = 4Which of the following access patterns necessarily avoids deadlock?a)R1, R3, R2b)R2, R3, R1c)R1,R2, R3d)R3, R2, R1Correct answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:R1 = F(Printer) = 12R2 = F (Tape Drive) = 1R3 = F(Disk Drive) = 4Which of the following access patterns necessarily avoids deadlock?a)R1, R3, R2b)R2, R3, R1c)R1,R2, R3d)R3, R2, R1Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a system with three resources, tape drive, printer and disk drive. Each one of them are assigned a unique number:R1 = F(Printer) = 12R2 = F (Tape Drive) = 1R3 = F(Disk Drive) = 4Which of the following access patterns necessarily avoids deadlock?a)R1, R3, R2b)R2, R3, R1c)R1,R2, R3d)R3, R2, R1Correct answer is option 'B'. Can you explain this answer?.
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