Biju Patnaik University of Technology 2008-4th Sem B.Tech (B Tech) , relation database management system . - Question Paper
BPUT(B Tech) , fourth semester relation database management system ques. paper. Total number of printed pages-7 B. Tech BCSE 3202 Fourth Semester Examination
RELATIONAL DATABASE MANAGEMENT SYSTEMS
Full Marks-70
Time-3 Hours
Answer Question No. 1 which is compulsory and any five from the rest.
The figures in the right-hand margin indicate marks.
1. Define the following terms : 2*10
(a) What is the difference between a primary key and a candidate key ?
(b) Let R = (A, B, C, D) and functional dependencies (1) A -> C, (2) AB -> D. What is the closure of {A, B} ?
(c) What do you mean by semi less join ?
(d) Define super key and give example to illustrate the super key.
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(e) What are the two techniques to prevent deadlock ?
(f) What do you mean by multi-valued
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dependency ?
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(g) Define and differentiate between Natural Join and Inner Join.
(h) What is meant by Concurrency ?
(i) Mention the various categories of Data Model.
(j) Define : Entity Type, Entity Set and Value Set.
2. (a) What is normalization of relation ? What
is a key attribute in a relation ? What is the difference between 1st Normal Form, 2nd normal form and 3rd normal form ?
5(b) Define entity, attribute and relationships as used in relational databases. Describe purpose of E-R Model. Illustrate your answer with an example. 5
3. (a) Define the structure and properties of B
Tree. Explain how the B tree is used as
a index structure. Construct a B tree of
order 3 with following key value : 10, 2,
30, 20, 86, 4, 6, 3, 60, 84, 88, 33, 52,
91, 69. 5
BCSE 3202 3 P.T.O.
(b) What are the major components of the relational model ? What is simple relational database ? What are two models in which you can use SQL ? 5
4. (a) Explain difference between Implicit and
Explicit locks. Give examples to support your answer. 5
(b) What is an object-oriented database ? What is its advantages compared to relational database ? Explain some applications where an object-oriented database may be useful. 5
5. (a) State Armstrongs axioms. Show that
Armstrongs axioms are complete. 5 BCSE 3202 4 Contd.
(b) Explain the difference between inner join and outer join. What are the restrictions on using outer join ? Give examples to support your answer. 5
6. (a) What does the term redundancy mean ? Discuss the implications of r edundancy in a relational database. 5
(b) Define (i) Primary key, and (ii) Foreign key, Suppose relation R(A,B,C,D,E) has functional dependencies:
AB -> C D > A AE -> B CD -> E BE -> D
Find all the candidate keys of R. 5 BCSE 3202 5 P.T.O.
7. (a) What is a distributed database management system ? How is it different to that of client server database systems ? 5
(b) Consider the following tables : 2
S R
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Show the semantics and the output of the following query :
SELECT *
FROM S, R
WHERE S.A = R.A AND S.B = R.G ;
(c) Define Data mining. What are the supports must available with DBMS to facilitate data mining ? 3
8. (a) List out the six fundamental operators and
4 additional operators in relational algebra.
2.5
(b) Explain the two conditions needed for the set difference operation (union operation) to be valid. 2.5
(c) Construct a B+ tree of order 1 with following keys, 1, 9, 5, 3, 7, 11, 17, 13, 15 ? 2.5
(d) What is the use of outer join and list out the three types of outer join with the notations used in relational algebra ?
2.5
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