Explanation: A Table is in 4NF if and only if, for every one of its non-trivial multivalued dependencies X \twoheadrightarrow Y, X is a superkey—that is, X is either a candidate key or a superset thereof. 9. Which forms are based on the concept of functional dependency:
A. 1NF
B. 2NF
C. 3NF
D. 4NF
Answer:A
Explanation: A Table is in 4NF if and only if, for every one of its non-trivial multivalued dependencies X \twoheadrightarrow Y, X is a superkey—that is, X is either a candidate key or a superset thereof. 9. Which forms are based on the concept of functional dependency:
A. 1NF B. 2NF C. 3NF D. 4NF
Explanation: The table is in 3NF if every non-prime attribute of R is non-transitively dependent (i.e. directly dependent) on every superkey of R. 10. Empdt1(empcode, name, street, city, state,pincode).