When multiple fields are used to identify a record, it is called a(n) ________ key
A) natural B) composite C) artificial D) alternate
B
Computer Science & Information Technology
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In an Excel PivotChart, what are the fields displayed in rows?
A) Legend (Series) B) Axis (Categories) C) Axis (Series) D) Legend (Categories)
Computer Science & Information Technology
State which of the following schedules are serializable.
a. r1(x) r2(y) r1(z ) r3(z ) r2(x) r1(y) b. r1(x) w2(y) r1(z ) r3(z ) w2(x) r1(y) c. r1(x) w2(y) r1(z ) r3(z ) w1(x) r2(y) d. r1(x) r2(y) r1(z ) r3(z ) w1(x) w2(y) e. r1(x) r2(y) w2(x) w3(x) w3(y) r1(y) f. w1(x) r2(y) r1(z ) r3(z ) r1(x) w2(y) g. r1(z ) w2(x) r2(z ) r2(y) w1(x) w3(z ) w1(y) r3(x)
Computer Science & Information Technology