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Which of the following is false?
- a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database design
- b)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decomposition
- c)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.
- d)none of these
Correct answer is option 'C'. Can you explain this answer?
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Which of the following is false?a)Normal forms are defined to test the...
FD need not to be preserved in an individual table,it can be preserved by the combination of more than one table.
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Which of the following is false?a)Normal forms are defined to test the...
False Statement: The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.
Explanation:
Normalization is a process in database design that helps eliminate redundancy and improve the efficiency of a database. The process involves decomposing a relation schema into multiple smaller relations based on functional dependencies. Each of these smaller relations should satisfy certain properties to ensure a good database design.
a) Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database design:
This statement is true. Normal forms, such as First Normal Form (1NF), Second Normal Form (2NF), Third Normal Form (3NF), etc., are defined to eliminate redundancy in relation schemas. These normal forms help in ensuring a good database design by organizing data efficiently.
b) The lossless join property guarantees that spurious tuple generation problem does not occur with respect to relation schemas created after decomposition:
This statement is true. The lossless join property ensures that when a relation schema is decomposed into smaller relations, it is still possible to reconstruct the original relation by joining the smaller relations. This property guarantees that no spurious tuples (additional or missing tuples) are generated during the join operation.
c) The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition:
This statement is false. The dependency preservation property does not guarantee that each functional dependency is represented in some individual relations resulting after decomposition. In fact, during the decomposition process, some functional dependencies may be lost. However, it is important to ensure that the decomposed relations can be joined back to enforce the lost dependencies.
d) None of these:
This option is incorrect as option c) is false.
In summary, the false statement is option c) which states that the dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.
Explanation:
Normalization is a process in database design that helps eliminate redundancy and improve the efficiency of a database. The process involves decomposing a relation schema into multiple smaller relations based on functional dependencies. Each of these smaller relations should satisfy certain properties to ensure a good database design.
a) Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database design:
This statement is true. Normal forms, such as First Normal Form (1NF), Second Normal Form (2NF), Third Normal Form (3NF), etc., are defined to eliminate redundancy in relation schemas. These normal forms help in ensuring a good database design by organizing data efficiently.
b) The lossless join property guarantees that spurious tuple generation problem does not occur with respect to relation schemas created after decomposition:
This statement is true. The lossless join property ensures that when a relation schema is decomposed into smaller relations, it is still possible to reconstruct the original relation by joining the smaller relations. This property guarantees that no spurious tuples (additional or missing tuples) are generated during the join operation.
c) The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition:
This statement is false. The dependency preservation property does not guarantee that each functional dependency is represented in some individual relations resulting after decomposition. In fact, during the decomposition process, some functional dependencies may be lost. However, it is important to ensure that the decomposed relations can be joined back to enforce the lost dependencies.
d) None of these:
This option is incorrect as option c) is false.
In summary, the false statement is option c) which states that the dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.
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Which of the following is false?a)Normal forms are defined to test the...
For dependency preservation each fd need not to be represented in some individual relation . we can also obtain through transitivity among different relation
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Which of the following is false?a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database designb)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decompositionc)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.d)none of theseCorrect answer is option 'C'. Can you explain this answer?
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Which of the following is false?a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database designb)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decompositionc)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.d)none of theseCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about Which of the following is false?a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database designb)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decompositionc)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.d)none of theseCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is false?a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database designb)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decompositionc)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.d)none of theseCorrect answer is option 'C'. Can you explain this answer?.
Which of the following is false?a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database designb)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decompositionc)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.d)none of theseCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about Which of the following is false?a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database designb)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decompositionc)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.d)none of theseCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is false?a)Normal forms are defined to test the redundancy level of relation schemas in order to ensure good database designb)The lossless join property guarantees that spurious tuple generation problem doesnot occur with respect to relation schemas created after decompositionc)The dependency preservation property ensures that each functional dependency is represented in some individual relations resulting after decomposition.d)none of theseCorrect answer is option 'C'. Can you explain this answer?.
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