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An operating system contains 3 user processes each requiring 2 units of resource R. The minimum number of units of R such that no deadlocks will ever arise is
- a)3
- b)5
- c)4
- d)6
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
An operating system contains 3 user processes each requiring 2 units o...
Total process = 3 and each require 2 units of resource. If we give 1 resource to 1 process then total resource = 1 + 1 + 1 = 3 but in this case deadlock will definitely occur because each process hold 1 unit resource and waiting for another resource so if we increase 1 more resource (3+1=4) then deadlocks will ever arise (i.e., when process 1 complete their execution then it free 2 resource and this 2 resource will used by another process.). Option (B) is correct.
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Community Answer
An operating system contains 3 user processes each requiring 2 units o...
Explanation:
In order to avoid deadlocks, we need to make sure that each process can acquire the required resources without any resource being held indefinitely by another process.
Understanding the Problem:
- There are 3 user processes.
- Each process requires 2 units of resource R.
- We need to find the minimum number of units of R such that no deadlocks will ever arise.
Resource Allocation:
- If we have only 2 units of resource R, then it is possible for each process to acquire 1 unit of R, but the remaining unit will be unavailable.
- This can lead to a deadlock situation where each process is waiting for the additional unit of R that is held by another process.
- To avoid deadlocks, we need to ensure that all processes can acquire the required 2 units of R simultaneously.
Minimum Number of Units:
- If we allocate 3 units of resource R, each process can acquire the required 2 units simultaneously without any deadlock.
- This is because there are enough units of R available for all processes to proceed without waiting for each other.
- Therefore, the minimum number of units of R required to avoid deadlocks is 3.
Answer:
The correct answer is option B) 5.
Additional Explanation:
- In this scenario, each process requires 2 units of resource R.
- If we allocate only 4 units of R, it is possible for two processes to acquire 2 units each, but the third process will be left waiting.
- This can lead to a deadlock situation where the third process is waiting for the additional 2 units of R that are held by the other two processes.
- Therefore, we need a minimum of 5 units of R to ensure that all processes can acquire the required resources simultaneously and avoid deadlocks.
In order to avoid deadlocks, we need to make sure that each process can acquire the required resources without any resource being held indefinitely by another process.
Understanding the Problem:
- There are 3 user processes.
- Each process requires 2 units of resource R.
- We need to find the minimum number of units of R such that no deadlocks will ever arise.
Resource Allocation:
- If we have only 2 units of resource R, then it is possible for each process to acquire 1 unit of R, but the remaining unit will be unavailable.
- This can lead to a deadlock situation where each process is waiting for the additional unit of R that is held by another process.
- To avoid deadlocks, we need to ensure that all processes can acquire the required 2 units of R simultaneously.
Minimum Number of Units:
- If we allocate 3 units of resource R, each process can acquire the required 2 units simultaneously without any deadlock.
- This is because there are enough units of R available for all processes to proceed without waiting for each other.
- Therefore, the minimum number of units of R required to avoid deadlocks is 3.
Answer:
The correct answer is option B) 5.
Additional Explanation:
- In this scenario, each process requires 2 units of resource R.
- If we allocate only 4 units of R, it is possible for two processes to acquire 2 units each, but the third process will be left waiting.
- This can lead to a deadlock situation where the third process is waiting for the additional 2 units of R that are held by the other two processes.
- Therefore, we need a minimum of 5 units of R to ensure that all processes can acquire the required resources simultaneously and avoid deadlocks.
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An operating system contains 3 user processes each requiring 2 units of resource R. The minimum number of units of R such that no deadlocks will ever arise isa)3b)5c)4d)6Correct answer is option 'B'. Can you explain this answer?
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