General doubt

Question

W1(A) W2(A) Commit1 Commit2
Is a
A) Concurrent Schedule
B) Recoverable Schedule
C) Cascadeless rollback Recoverable schedule
D) Strictly recoverable schedule

Comments

but is it a roll back??

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Mam,it is a blind write any manipulation of variable A is occur between R(A) and write operation  i.e W(A).in this question there is no read operation then both write operation can write anything .W2(A) does not goes to check what is value of A written by W1(A) in log file.it's my interpretation .if it's wrong correct me.

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simply saying, there is no dirty read ===> cascadeless recoverable schedule. (yes option a and b also true)

But note that it is not strict schedule

Answer 1

It will be Cascadeless rollback or cascadeless schedule and recoverable schedule.

A,B,C are true.