Geeks for Geeks Test

Question

Consider the following schedules:

S₁: r₁(A); r₁(B); w₁(C); w₂(D); w₁(A); w₂(A); r₁(D);
S₂: r₁(A); r₁(B); r₁(C); r₁(D); w₁(A); w₂(B); w₃(C); w₄(D)

Which of the following option is correct?

A. S₁ has blind writes and S₂ is not

B. S₂ has blind writes and S₁ is not

C. Both schedules are conflict serializable

D. None of the above

 

Comments

I appeared today for the DBMS test that went live today.

Most of the questions are wrongly interpreted. only 30 minutes time for 15 questions, which seem equally tough with 5 marks alloted for each question.

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i hope they wrong, any explanation they given?

 

if you have some doubt, just post with the question.. Otherwise we have to solve complete question...

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In their explanation, they have directly written that S2 does not have blind writes. But its clearly visible S2 has blind writes.