Question 61 Aggregation is : A an abstraction through which relationships are treated as lower level entities. B an abstraction through which relationships are treated as […]
Question 326 Specialization Lattice stands for A An entity type can participate as a subclass in only one specialization. B An entity type can participate as […]
Question 22 Consider the following schedule for transactions T1, T2 and T3: Which one of the schedules below is the correct serialization of the above? […]
Question 2 Consider the two statements. S1: There exist random variables X and Y such that EX-E(X)Y-E(Y)2>Var[X] Var[Y] S2: For all random variables X and Y, […]