Q10

MCQ1 mark, −0.33

Consider concurrent execution of two transactions $T 1$ and $T 2$ in a DBMS, both of which access a data object $A$ . For these two transactions to not conflict on $A$ , which one of the following statements must be true?

(A)

Both $T 1$ and $T 2$ only read $A$

(B)

$T 1$ reads $A$ and $T 2$ writes $A$

(C)

$T 1$ writes $A$ and $T 2$ reads $A$

(D)

Both $T 1$ and $T 2$ write $A$

Loading…