GATE 2007
October 14, 2023GATE 2007
October 14, 2023Database-Management-System
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Question 21
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A relation Empdtl is defined with attributes empcode (unique), name, street, city, state and pincode. For any pincode, there is only one city and state. Also, for any given street, city and state, there is just one pincode. In normalization terms, Empdtl is a relation in
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1NF only
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2NF and hence also in 1NF
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3NF and hence also in 2NF and 1NF
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BCNF and hence also in 3NF, 2NF an 1NF
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Question 21 Explanation:
It is in 2NF. For 2NF all non-prime attribute should be fully functionally dependent on key.
Here key is empcode and contains only one attribute, hence no partial dependency. But there is transitive dependency in this.
Pincode → city, state, so it is not in 3NF.
Here key is empcode and contains only one attribute, hence no partial dependency. But there is transitive dependency in this.
Pincode → city, state, so it is not in 3NF.
Correct Answer: B
Question 21 Explanation:
It is in 2NF. For 2NF all non-prime attribute should be fully functionally dependent on key.
Here key is empcode and contains only one attribute, hence no partial dependency. But there is transitive dependency in this.
Pincode → city, state, so it is not in 3NF.
Here key is empcode and contains only one attribute, hence no partial dependency. But there is transitive dependency in this.
Pincode → city, state, so it is not in 3NF.
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