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A computer system has 6 tape drives, with 'n' processes competing for them. Each process may need 3 tape drives. The maximum value of ‘n’ for which the system is guaranteed to be deadlock free is
  • a)
    2
  • b)
    3
  • c)
    4
  • d)
    1
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A computer system has 6 tape drives, with 'n'processes competi...
2 process can never lead to deadlock as the peak time demand of 6 (3 + 3) tape drives can be satisfied. But 3 processes can lead to a deadlock if each hold 2 drives and then demand one more.
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Most Upvoted Answer
A computer system has 6 tape drives, with 'n'processes competi...
N that would not result in deadlock is 2.

To see why, let's consider the worst-case scenario where all processes are competing for the same 3 tape drives. If there are more than 2 processes, there will always be at least one process that cannot acquire all 3 tape drives, resulting in deadlock.

For example, if there are 3 processes, each needing 3 tape drives, only 2 processes can acquire the tape drives while the third process will be left waiting indefinitely, leading to deadlock.

However, if there are only 2 processes, each needing 3 tape drives, both processes can acquire the tape drives simultaneously and complete their tasks without deadlock.
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A computer system has 6 tape drives, with 'n'processes competing for them. Each process may need 3 tape drives. The maximum value of ‘n’ for which the system is guaranteed to be deadlock free isa)2b)3c)4d)1Correct answer is option 'A'. Can you explain this answer?
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