67 || DBMS || Previous GATE Questions on Functional Dependencies and Normalization - examples
Questions:
1) Let R = ( A, B, C, D, E, F ) be a relation scheme with the following dependencies: C→F, E→A, EC→D, A→B. Which of the following is a key of R?
2) R(A,B,C,D) is a relation. Which of the following does not have a lossless join, dependency preserving BCNF decomposition?
3) Which one of the following statements about normal forms is FALSE?
(a) BCNF is stricter than 3NF
(b) Lossless, dependency-preserving decomposition into 3NF is always possible
(c) Lossless, dependency-preserving decomposition into BCNF is always possible
(d) Any relation with two attributes is in BCNF
4) A table has fields Fl, F2, F3, F4, F5 with the following functional dependencies F1 → F3 F2→ F4 (F1 . F2) → F5 In terms of Normalization, this table is in ?
5) Which of the following is TRUE?
a) Every relation in 3NF is also in BCNF
b) A relation R is in 3NF if every non-prime attribute of R is fully functionally dependent on every key of R
c) Every relation in BCNF is also in 3NF
d) No relation can be in both BCNF and 3NF
6) 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 }
7) Which of the following functional dependencies are satisfied by the instance?
8) Relation R is decomposed using a set of functional dependencies, F and relation S is decomposed using another set of functional dependencies G. One decomposition is definitely BCNF, the other is definitely 3NF, but it is not known which is which. To make a guaranteed identification, which one of the following tests should be used on the decompositions? (Assume that the closures of F and G are available).
Prepare for your GATE exam with our comprehensive guide to solving previous GATE questions on Functional Dependencies and Normalization. This video provides detailed explanations and practical examples to help you understand and tackle these important topics effectively.
🔍 What You'll Learn:
Functional Dependencies: Understand the key concepts, rules, and examples of functional dependencies.
Normalization: Learn the criteria and steps for achieving various normal forms, including 1NF, 2NF, 3NF, and BCNF.
Step-by-Step Solutions: Follow detailed solutions to previous GATE questions, helping you grasp the concepts and improve your problem-solving skills.
Exam Tips: Gain valuable insights and strategies for answering GATE questions related to functional dependencies and normalization.
📚 Why This Video Matters:
Functional dependencies and normalization are critical topics in database management systems, and they frequently appear in GATE exams. This tutorial equips you with the knowledge and skills to solve related questions confidently, boosting your exam preparation.
💡 Who Should Watch:
Students and learners preparing for the GATE exam.
Anyone looking to strengthen their understanding of functional dependencies and normalization in DBMS.
Database administrators and developers seeking to enhance their database design skills.
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