Database-Management-System
October 14, 2023Database-Management-System
October 14, 2023Database-Management-System
| Question 27 |
For a database relation R(a,b,c,d), where the domains a, b, c, d include only atomic values, only the following functional dependencies and those that can be inferred from them hold:
a → c b → d
This relation is
| in first normal form but not in second normal form | |
| in second normal form but not in third normal form | |
| in third normal form | |
| None of the above |
Question 27 Explanation:
Candidate key is ab.
Since all a, b, c, d are atomic. So the relation is in 1NF.
Checking the FD’s
a → c
b → d
We can see that there is partial dependencies. So it is not 2NF.
So answer is option (A).
Since all a, b, c, d are atomic. So the relation is in 1NF.
Checking the FD’s
a → c
b → d
We can see that there is partial dependencies. So it is not 2NF.
So answer is option (A).
Correct Answer: A
Question 27 Explanation:
Candidate key is ab.
Since all a, b, c, d are atomic. So the relation is in 1NF.
Checking the FD’s
a → c
b → d
We can see that there is partial dependencies. So it is not 2NF.
So answer is option (A).
Since all a, b, c, d are atomic. So the relation is in 1NF.
Checking the FD’s
a → c
b → d
We can see that there is partial dependencies. So it is not 2NF.
So answer is option (A).
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