transaction

Question

Consider the following schedule for transaction T₁ , T₂ and T₃.

R1(X),R2(Y),R3(Y),W1(X),W3(X),R2(Z),W1(X)

Also assume that the time-stamp for the three transaction is {30, 10, 20}. Which of the following statement is true with respect to above schedule?

A The schedule is allowed under basic time-stamp protocol but not Thomas write time-stamp

B The schedule is allowed under Thomas write time-stamp protocol but not basic time-stamp protocol.Correct Option

C The schedule is not allowed under any of the basic time-stamp protocol as well as Thomas write.

D The schedule is allowed under both basic time-stamp protocol as well as Thomas write.

Comments

where is the schedule?

I think it is an incomplete question

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 srestha  now question is complete

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Yes B is the correct option.

Due to W3(X) and W1(X)[last] it is not allowed under basic TS but allowed under TWR.