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NIELIT 2016 MAR Scientist B - Section C: 41
Lakshman Patel RJIT
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Mar 31, 2020
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The employee salary should not be greater than Rs.$2000$. This is
integrity constraint
referential constraint
over-defined constraint
feasible constraint
nielit2016mar-scientistb
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Lakshman Patel RJIT
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Mar 31, 2020
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Lakshman Patel RJIT
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Option A. Integrity Constraint
Saitheja Muthoju
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Apr 26, 2020
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Saitheja Muthoju
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Answer:
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NIELIT 2016 MAR Scientist B - Section C: 34
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NIELIT 2016 MAR Scientist B - Section C: 42
The relational algebra expression equivalent to the tuple calculus expression $\{t\mid t \in r \land (t[A]=10 \land t[B]=20)\}$ is $\sigma_{(A=10\:\lor\:B=20)}(r)$ $\sigma_{(A=10)}(r)\cup\sigma_{(B=20)}(r)$ $\sigma_{(A=10)}(r)\cap\sigma_{(B=20)}(r)$ $\sigma_{(A=10)}(r)-\sigma_{(B=20)}(r)$
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NIELIT 2016 MAR Scientist B - Section C: 44
For a database relation $R(a,b,c,d)$ where the domains of $a,b,c,d$ include only atomic values, only the following functional dependencies and those that can be inferred from them hold: $a\to c\\b\to d$ the relation is in first normal form but not in second normal form. second normal form but not in third normal form. third normal form. none of these.
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