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Consider the following transaction involving two bank accounts x and y.
read (x); x := x – 50 ; write (x) ; read (y) ; y≔ y + 50 ; write (y)
The constraint that the sum of the accounts x and y should remain constant is that of
  • a)
    Atomicity
  • b)
    Consistency
  • c)
    Isolation
  • d)
    Durability
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider the following transaction involving two bank accounts x and y...
Let us assume that RS.50 is debited from one account and credited to another account, in such case T1 transaction should execute first then T2
Before transaction: Initially
x = 100 and y = 150 then x + y = 250
After transaction: Finally
x = 50 and y = 200 then x + y = 250
The constraint that the sum of the accounts x and y should remain constant is that of consistency.
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Community Answer
Consider the following transaction involving two bank accounts x and y...
In order to provide a complete response, the statement seems to be incomplete. Could you please provide the full statement for the transaction involving bank accounts x and y?
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Consider the following transaction involving two bank accounts x and y.read (x); x := x – 50 ; write (x) ; read (y) ; y y + 50 ; write (y)The constraint that the sum of the accounts x and y should remain constant is that ofa)Atomicityb)Consistencyc)Isolationd)DurabilityCorrect answer is option 'B'. Can you explain this answer?
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