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State true or false: If I = read(Q) and J = write(Q) then the order of I and J does not matter.

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State true or false: If I = read(Q) and J = write(Q) then the order of I and J does not matter.

(a) True

(b) False

This question was addressed to me in final exam.

This question is from Serializability topic in division Transactions of RDBMS

1 Answer

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Best answer
The correct option is (b) False

Easiest explanation: If I = read(Q) and J = write(Q) then the order of I and J matters because both I  and J are different operations on the query. The order of execution determines the state of the database that is being read or written.

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