DSSSB PGT 2021
December 15, 2024NTA UGC NET DEC-2022 Paper-2
December 17, 2024Candidate-key
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Question 2
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Given the STUDENTS relation as shown below.
For (StudentName, StudentAge) to be the key for this instance, the value X should not be equal to
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19
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20
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21
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22
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Question 2 Explanation:
There is already one entry with StudentName as “Shankar” and Age as 19. So, X value should not be 19.
Correct Answer: A
Question 2 Explanation:
There is already one entry with StudentName as “Shankar” and Age as 19. So, X value should not be 19.